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Table A.1:

A list of all known MHOs in the Orion.

Objecta 		RAa Deca Other IDb HHc Referencesd Comment Region
MHO 1 05 35 19.3 -04 55 45 ${\rm 1-1/SMZ1}$ - 1, 2 Two compact knots east and west of a young star in OMC 3 Orion-A
MHO 2 05 35 31.5 -05 00 15 ${\rm 1-2/SMZ2}$ - 1, 2 Faint knotty flow orientated northwest-southeast in OMC 3 Orion-A
MHO 3 05 35 24.5 -05 00 23 ${\rm YBD 36/41/42/50, 1-3/SMZ3}$ - 3, 1, 2 Arcs/filaments in eastern lobe of a bipolar outflow in OMC 3, counter-lobe of MHO 4-6 Orion-A
MHO 4 05 35 17.9 -05 00 35 ${\rm YBD 7, 1-4/SMZ3}$ - 3, 1, 2 Knot and filament extending west of the MHO 3-6 (SMZ 3)outflow sources in OMC 3 Orion-A
MHO 5 05 35 13.0 -05 00 33 ${\rm YBD 2/3, 1-5/SMZ3}$ - 3, 1, 2 East - west group of knots and filaments, part of MHO 3-6(SMZ 3) outflow in OMC 3 Orion-A
MHO 6 05 35 06.6 -05 00 53 ${\rm YBD 1, 1-6/SMZ3}$ - 3, 1, 2 Large, faint bows at western end of MHO 3-6 (SMZ3) outflow in OMC 3 Orion-A
MHO 7 05 35 23.4 -05 01 30 ${\rm YBD 28/30/32, 1-7/SMZ4}$ - 3, 1, 2 Three compact knots in north-south outflow, either side of a young IR source in OMC Orion-A
MHO 8 05 35 21.1 -05 01 16 ${\rm YBD 13/17, 1-8/SMZ5}$ HH 293 3, 1, 2 Series of compact knots in east-west outflow in OMC 3 Orion-A
MHO 9 05 35 33.6 -05 02 13 ${\rm 1-9/SMZ7}$ - 1, 2 Faint bow in OMC 2/3, possibly associated with MHO 10 Orion-A
MHO 10 05 35 31.8 -05 03 13 ${\rm YBD 76, 1-10/SMZ7}$ - 3, 1, 2 Two faint knots in OMC 2/3, possibly part of the SMZ 7 outflow Orion-A
MHO 11 05 35 24.7 -05 04 03 ${\rm YBD 27/46, 1-11/SMZ6}$ HH 294 3, 1, 2 Emission associated with Haro 5a/6a bipolar outflow and bright IR reflection nebula Orion-A
MHO 12 05 35 09.9 -05 03 56 ${\rm 1-12/SMZ6}$ - 1, 2 Large faint bow shocks in western lobe of outflow from Haro 5a/6a (MHO 11/12, SMZ 6) Orion-A
MHO 13 05 34 42.2 -05 04 18 ${\rm 1-13/SMZ6}$ HH 295 1, 2 Knots/filaments in OMC 2/3, probably extension of MHO 12 flow lobe from Haro 5a/6a Orion-A
MHO 14 05 35 42.1 -05 04 41 ${\rm YBD 80, 1-14/SMZ8}$ - 3, 1, 2 Bow shock in OMC 2/3 orientated towards the east Orion-A
MHO 15 05 35 31.6 -05 04 39 ${\rm YBD 75, 1-15/SMZ8?}$ - 3, 1, 2 Group of very faint, compact knots in OMC 2/3, possibly associated with MHO 14 Orion-A
MHO 16 05 35 35.5 -05 05 02 ${\rm YBD 78/79, 1-16/SMZ10}$ HH 287 3, 1, 2 Limb-brightened wings of a northeast-southwest bow shock in OMC 2/3, Orion-A
MHO 17 05 35 27.6 -05 05 08 ${\rm 1-17/SMZ7}$ - 1, 2 Faint emission elongated northeast-southwest, either side of an IR source in OMC 2/3 Orion-A
MHO 18 05 35 24.2 -05 05 52 ${\rm YBD 4/5/8/15/16/25/29/39/40/}$ HH 330 3, 1, 2 Bright, east-west orientated outflow in OMC 2/3 Orion-A
      ${\rm 43/48/54/59/70, 1-18/SMZ9}$        
MHO 19 05 35 23.8 -05 06 01 ${\rm 1-19/SMZ11}$ - 1, 2 Two bright knots elongated north-south in OMC 2/3, probably associated with MHO 22 Orion-A
MHO 20 05 35 31.9 -05 06 22 ${\rm YBD 74/77, 1-20/SMZ14}$ - 3, 1, 2 Cone of knotty emission in OMC 2/3; may be associated with MHO 25 or MHO 208 Orion-A
MHO 21 05 35 27.6 -05 07 07 ${\rm YBD 61/63, 1-21/SMZ12}$ - 3, 1, 2 Two compact knots elongated north-south; located either side of IR source in OMC 2/3 Orion-A
MHO 22 05 35 22.5 -05 07 18 ${\rm YBD 21/24/31/33/38,}$ - 3, 1, 2 Curving chain of bright, compact knots in OMC 2/3 Orion-A
      ${\rm 1-22/SMZ11/13}$        
MHO 23 05 35 17.7 -05 07 22 ${\rm 1-23}$ - 1, 2 Faint, compact knot in OMC 2/3 Orion-A
MHO 24 05 35 20.2 -05 07 55 ${\rm 1-24}$ - 1, 2 Faint, compact knot in OMC 2/3, possibly associated with MHO 22 Orion-A
MHO 25 05 35 25.6 -05 07 57 ${\rm YBD 49/53/58, 1-25/SMZ14}$ HH 383 3, 1, 2 Limb-brightened cavities extending northeast and southwest of IR source in OMC 2/3 Orion-A
MHO 26 05 35 07.2 -05 08 05 ${\rm 1-26}$ - 1, 2 Faint, compact knot in OMC 2/3 Orion-A
MHO 27 05 35 29.1 -05 08 50 ${\rm YBD 67/68/69/71/72/73, }$ HH 887 3, 1, 2 Bright complex lobe of emission in OMC 2, comprising multiple knots Orion-A
      ${\rm 1-27/SMZ17/SMZ18}$     and bow shocks, possibly two flows  
MHO 28 05 35 23.2 -05 08 44 ${\rm YBD 23/37, 1-28}$ - 3, 1, 2 Faint knotty filament in OMC 2, possibly associated with MHO 25 Orion-A
MHO 29 05 35 19.6 -05 08 56 ${\rm 1-29/SMZ16}$ - 1, 2 Faint filament or bow shock in OMC 2, possibly associated with MHO 25 Orion-A
MHO 30 05 35 25.4 -05 09 22 ${\rm YBD 51/52, 1-30/SMZ19/SMZ20}$ HH 384 3, 1, 2 Chain of knots in OMC 2 extending west and north of IR sources, possibly two jets Orion-A
MHO 31 05 35 27.5 -05 09 36 ${\rm YBD 65, 1-31/SMZ17}$ - 3, 1, 2 Bright nebulous region assoc. with embedded star in OMC 2, counter-lobe of MHO 27 Orion-A
MHO 32 05 35 16.1 -05 10 27 ${\rm YBD 6, HH 44 IR, 1-32/SMZ25}$ HH 44 3, 4, 1, 2 Bright bow-shock/knots in northern lobe of outflow in OMC 2; associated with MHO 39? Orion-A
MHO 33 05 35 27.7 -05 10 10 ${\rm 1-33}$ - 1, 2 Group of faint compact knots associated with conical, bipolar nebula in OMC 2 Orion-A
MHO 34 05 35 24.3 -05 10 43 ${\rm YBD 44, 1-34}$ - 3, 1, 2 Faint bow shock feature associated with conical, bipolar nebula in OMC 2 Orion-A
MHO 35 05 35 24.2 -05 11 00 ${\rm 1-35}$ - 1, 2 Two compact knots in OMC 2 Orion-A
MHO 36 05 34 50.4 -05 11 10 ${\rm 1-36}$ - 1, 2 Group of knots/filaments to the west of OMC 2 Orion-A
MHO 37 05 35 27.3 -05 11 51 ${\rm YBD 60/62/64/66, }$ - 3, 1, 2 Two or three compact knots in a north-south flow in OMC 2 Orion-A
      ${\rm 1-37/SMZ21/SMZ22 }$        
MHO 38 05 35 20.3 -05 14 03 ${\rm YBD 14/18/20, 1-38/SMZ23}$ - 3, 1, 2 Collimated jet and bow shock flowing towards the Southwest in OMC 2 Orion-A
MHO 39 05 35 19.1 -05 11 43 ${\rm YBD 11/12, 1-39/SMZ25}$ HH 535 3, 1, 2 Knotty filament in OMC 2, probably in the same flow lobe as MHO 32 Orion-A
MHO 40 05 35 23.3 -05 12 03 ${\rm YBD 9/10/19/22/26/35, }$ HH 536 3, 1, 2 Limb-brightened outflow lobe and knots extending towards the southwest in OMC 2 Orion-A
      ${\rm 1-40/SMZ24}$        
MHO 41 05 34 45.5 -05 12 29 ${\rm 1-41}$ - 1, 2 Faint knot and filament extending towards MHO 36 in OMC 2-west Orion-A
MHO 42 05 35 20.5 -05 12 41 ${\rm 1-42/SMZ25}$ - 1, 2 Faint compact knots in OMC 2, possibly part of the MHO 32/39 (SMZ 25) outflow lobe Orion-A
MHO 43 05 35 17.1 -05 13 29 ${\rm 1-43, DFS 104}$ - 1, 2 Small group of compact knots in OMC 2 Orion-A
MHO 44 05 35 11.5 -05 20 55 ${\rm 2-1}$ - 1, 2 Small, triangular knot to north-west of the main nebula (Orion ``bullet''?) Orion-A
MHO 45 05 35 02.5 -05 21 50 ${\rm 2-2/SMZ26}$ - 1, 2 Three compact knots to west of the Orion nebula Orion-A
MHO 46 05 35 09.1 -05 22 50 ${\rm 2-3/SMZ26}$ - 1, 2 Compact knots/bow shock to west of the Orion nebula Orion-A
MHO 47 05 35 00.0 -05 23 32 ${\rm 2-4/SMZ28?}$ - 1, 2 Small group of knots to west of the Orion nebula Orion-A
MHO 48 05 35 11.7 -05 23 40 ${\rm 2-5/SMZ27/SMZ28}$ - 1, 2 Chain of knots with southeast-northwest orientation situated to west of the Orion nebula Orion-A
MHO 49 05 35 09.9 -05 23 46 ${\rm 2-6/SMZ28}$ - 1, 2 Group of features with east-west orientation found to west of the Orion nebula Orion-A
MHO 50 05 34 38.5 -05 30 14 ${\rm 2-7/SMZ29}$ - 1, 2 Faint features with southeast-northwest orientation in the OMC 4 region Orion-A
MHO 51 05 35 18.5 -05 31 25 ${\rm 2-8/SMZ30}$ - 1, 2 Two faint knots in OMC 4 Orion-A
MHO 52 05 35 17.3 -05 32 02 ${\rm 2-9/SMZ30}$ - 1, 2 Compact knot in OMC 4 Orion-A
MHO 53 05 35 04.5 -05 33 31 ${\rm 3-1, DFS 108}$ HH 541 1, 2 Small, curving jet from embedded source in OMC 4 Orion-A
MHO 54 05 34 43.6 -05 34 06 ${\rm 3-2/SMZ29}$ - 1, 2 Two groups of faint knots/filaments near bright star in OMC 4 Orion-A
MHO 55 05 35 12.1 -05 34 04 ${\rm 3-3}$ - 1, 2 Faint knot in OMC 4 Orion-A
MHO 56 05 35 03.2 -05 34 22 ${\rm 3-4}$ - 1, 2 Two faint knots in OMC 4 Orion-A
MHO 57 05 35 23.7 -05 36 09 ${\rm 3-5, DFS 109}$ - 1, 2 Two bow shocks in eastern lobe of outflow found in OMC 4 Orion-A
MHO 58 05 34 29.5 -05 36 05 ${\rm 3-6, DFS 106}$ - 1, 2 Faint, curving filament to west of OMC 4 Orion-A
MHO 59 05 34 32.0 -05 37 51 ${\rm 3-7, DFS 107}$ - 1, 2 Faint though collimated chain of knots to west of OMC 4 Orion-A
MHO 60 05 35 11.5 -05 39 28 ${\rm 3-8/SMZ32}$ - 1, 2 Group of faint knots, possibly associated with MHO 62 (SMZ 32) in OMC 4 Orion-A
MHO 61 05 34 35.2 -05 39 51 ${\rm 3-9/SMZ31}$ - 1, 2 Compact bipolar outflow from IR source in OMC 4 Orion-A
MHO 62 05 35 11.4 -05 40 13 ${\rm 3-10/SMZ32}$ - 1, 2 Faint knot, possibly associated with MHO 60 (SMZ 32) in OMC 4 Orion-A
MHO 63 05 34 46.6 -05 40 55 ${\rm 3-11, DFS 111}$ - 1, 2 Knotty bow shock facing northeastward and situated in OMC 4 Orion-A
MHO 64 05 34 52.5 -05 41 43 ${\rm 3-12/SMZ33}$ - 1, 2 Faint, S-shaped filament in OMC 4 Orion-A
MHO 65 05 35 09.8 -05 43 43 ${\rm 3-13/SMZ34}$ - 1, 2 Grouping of one bright knot and one faint knot in OMC 4 Orion-A
MHO 66 05 34 50.8 -05 44 20 ${\rm 3-14/SMZ35}$ - 1, 2 Two small knots in OMC 4 Orion-A
MHO 67 05 35 10.1 -05 45 05 ${\rm 3-15/SMZ36}$ - 1, 2 Grouping of three knots in OMC 4 Orion-A
MHO 68 05 35 06.2 -05 51 04 ${\rm 3-16/SMZ37}$ - 1, 2 Bow shock and small knot in OMC 5 Orion-A
MHO 69 05 35 04.8 -05 51 51 ${\rm 3-17/SMZ38?}$ - 1, 2 Group of three knots and a filament in OMC 5, may be associated with MHO 70-73 Orion-A
MHO 70 05 35 04.5 -05 52 51 ${\rm 4-1/SZM38}$ - 1, 2 Faint filament in OMC 5, part of MHO 70-73 (SMZ 38) Orion-A
MHO 71 05 35 05.8 -05 54 11 ${\rm 4-2/SMZ38}$ - 1, 2 Two faint knots in OMC 5, part of MHO 70-73 (SMZ 38) Orion-A
MHO 72 05 35 08.3 -05 55 30 ${\rm 4-3/SMZ38}$ - 1, 2 Faint filament in OMC 5, part of MHO 70-73 Orion-A
MHO 73 05 35 11.0 -05 56 58 ${\rm 4-5/SMZ38/, SMZ39?}$ - 1, 2 Bow shocks in southern counter-lobe of MHO 70-73 flow in OMC 5 Orion-A
MHO 74 05 35 12.6 -05 56 38 ${\rm 4-4/SMZ39}$ - 1, 2 Compact knots in OMC 5, part of flow that runs orthogonal to MHO 70-73 Orion-A
MHO 75 05 35 13.1 -05 57 11 ${\rm 4-6/SMZ39}$ - 1, 2 Three compact knots in OMC 5 Orion-A
MHO 76 05 35 10.9 -05 57 37 ${\rm 4-7/SMZ39}$ - 1, 2 Filament with east-west orientation in OMC 5 Orion-A
MHO 77 05 35 03.1 -06 00 42 ${\rm 4-8/SMZ39}$ - 1, 2 Two faint knots adjacent to two bright stars in OMC 5 (can not be seen in this image) Orion-A
MHO 78 05 35 37.5 -06 02 32 ${\rm 4-9/SMZ40}$ - 1, 2 Filament with east-west orientation in OMC 5 Orion-A
MHO 79 05 35 10.5 -06 03 49 ${\rm 4-10/SMZ41}$ - 1, 2 Knotty, south-facing bow shock in OMC 5 Orion-A
MHO 80 05 35 30.5 -06 12 17 ${\rm 4-11/SMZ42}$ - 1, 2 Faint counter-lobe of MHO 80/81 outflow (SMZ 42) in OMC 5-south Orion-A
MHO 81 05 35 18.5 -06 13 29 ${\rm 4-12/SMZ42}$ - 1, 2 Jet and bow-shock, associated with MHO 80 in OMC 5-south Orion-A
MHO 82 05 36 09.3 -06 09 28 ${\rm 5-1}$ - 5, 1, 2 Two faint knots in OMC 5-south Orion-A
MHO 83 05 35 50.5 -06 10 22 ${\rm 5-2/SMZ43}$ - 5, 1, 2 Arced filament or bubble in OMC 5-south (possibly a PDR) Orion-A
MHO 84 05 35 43.5 -06 12 20 ${\rm 5-3/SMZ44}$ - 5, 1, 2 Elongated knot in OMC 5-south with bow shock to the southeast Orion-A
MHO 85 05 36 17.0 -06 11 59 ${\rm 5-4/SMZ45}$ - 5, 1, 2 Collection of faint knots, probably in a north-south orientated flow north of L 1641-N Orion-A
MHO 86 05 36 36.9 -06 14 41 ${\rm 5-5/SMZ46}$ HH 304 5, 1, 2 Group of knots around a nebulous IR source found to the north of L 1641-N Orion-A
MHO 87 05 35 39.0 -06 15 24 ${\rm 5-6/SMZ47}$ - 5, 1, 2 Chain of faint, compact knots/bows to the north-west of L 1641-N Orion-A
MHO 88 05 35 41.8 -06 18 30 ${\rm 5-7/SMZ52}$ HH 324 5, 1, 2 Faint filaments and a bow shock to the north-west of L 1641-N Orion-A
MHO 89 05 36 18.3 -06 19 42 ${\rm 5-8/SMZ49}$ HH 303 5, 1, 6, 2 Filament a few arcmin north of the L1641-N cluster Orion-A
MHO 90 05 36 10.8 -06 19 49 ${\rm 5-9/SMZ48}$ HH 299 5, 1, 6, 2 Filament with northeast-southwest orientation near L 1641-N Orion-A
MHO 91 05 36 02.7 -06 20 03 ${\rm 5-10/SMZ52}$ - 5, 1, 2 Faint filament/two knots with east-west orientation near L 1641-N Orion-A
MHO 92 05 36 48.2 -06 20 36 ${\rm 5-11/SMZ51}$ - 5, 1, 2 Faint knot to the east of L 1641-N, probably associated with MHO 93 and MHO 98 Orion-A
MHO 93 05 36 38.0 -06 21 29 ${\rm 5-12/SMZ51}$ HH 301 5, 1, 2 Knotty bow shock to the east of L 1641-N, associated with MHO 92 and MHO 98 Orion-A
MHO 94 05 35 26.2 -06 21 10 ${\rm 5-13A/SMZ55}$ - 5, 1, 2 Filament to the west of L 1641-N, associated with MHO 95 Orion-A
MHO 95 05 35 26.5 -06 23 21 ${\rm 5-13B/SMZ55}$ - 1, 2 Faint filament to the west of L 1641-N, associated with MHO 94 Orion-A
MHO 96 05 36 29.5 -06 24 33 ${\rm 5-20/SMZ54, DFS 115}$ - 5, 1, 6, 7, 2 Compact knots southeast of L1641-N Orion-A
MHO 97 05 36 12.2 -06 22 14 ${\rm 5-15/SMZ50}$ - 5, 1, 6, 7, 2 Chain of compact knots orientated north-south, situated just west of L 1641-N Orion-A
MHO 98 05 36 25.5 -06 22 45 ${\rm 5-16/SMZ51}$ - 5, 1, 6, 7, 2 Two east-west filaments at the base of the MHO 92/93 flow lobe in L 1641-N Orion-A
MHO 99 05 36 38.8 -06 22 38 ${\rm 5-17/SMZ17}$ - 5, 1, 2 Faint bow shock just east of L 1641-N Orion-A
MHO 100 05 36 47.8 -06 23 04 ${\rm 5-18/SMZ52, DFS 115}$ - 5, 1, 2 Small, faint bows heading east-northeast from L 1641-N; same flow as MHO 102? Orion-A
MHO 101 05 35 53.3 -06 24 32 ${\rm 5-19}$ - 5, 1, 2 Group of faint knots west of L 1641-N Orion-A
MHO 102 05 36 29.5 -06 24 33 ${\rm 5-20/SMZ54, DFS 115}$ - 5, 1, 6, 2 Compact knots southeast of L1641-N Orion-A
MHO 103 05 35 29.8 -06 26 58 ${\rm 5-21/SMZ55}$ HH 34 8, 5, 1, 9, 2 Collimated jet and counter jet; well-known HH flow with bows Orion-A
MHO 104 05 36 35.7 -06 25 49 ${\rm 5-22/SMZ54}$ - 5, 1, 2 Faint emission $\sim $3$^\prime$ southeast of L 1641-N cluster Orion-A
MHO 105 05 36 21.5 -06 30 30 ${\rm 5-23/SMZ49}$ - 5, 1, 2 Extensive chain of knots, filaments and bows; part of large flow from the L1641-N cluster Orion-A
MHO 106 05 35 30.0 -06 28 05 ${\rm 5-24/SMZ56}$ - 5, 1, 2 Collimated north-south jet near HH 34/MHO 103 Orion-A
MHO 107 05 36 56.9 -06 34 18 ${\rm 5-25/SMZ57}$ HH 292 5, 1, 2 Two compact knots to southeast of L 1641-N Orion-A
MHO 108 05 35 40.0 -06 35 40 ${\rm 5-26/SMZ55}$ HH 86 5, 1, 2 Group of knotty bow shocks to south-west of L 1641-N; extension of MHO 103/HH 34? Orion-A
MHO 109 05 35 44.0 -06 37 40 ${\rm 5-26/SMZ55}$ HH87/88 5, 1, 2 Group of bow shocks downwind of MHO 108 in the MHO 103/HH 34/ SMZ 55 outflow Orion-A
MHO 110 05 37 00.1 -06 37 12 ${\rm 5-27/SMZ58}$ - 5, 1, 2 Collimated bipolar jets and sweeping bow shocks to southeast of L 1641-N Orion-A
MHO 111 05 36 36.1 -06 38 45 ${\rm 5-28/6-1/SMZ59}$ - 5, 1,10, 2 Curving bipolar outflow from V 380 Ori-NE, $\sim $8$^\prime$ northeast of HH 1/2 Orion-A
MHO 112 05 36 30.3 -06 39 56 ${\rm 6-2/SMZ49}$ - 1, 2 Two groups of features to north of HH 1/2, probably an extension of MHO 105/SMZ 49 Orion-A
MHO 113 05 36 22.2 -06 41 50 ${\rm 6-3/SMZ60}$ HH 35 1, 2 Bright though compact knots to north of HH 1/2 Orion-A
MHO 114 05 36 32.1 -06 42 30 ${\rm 6-4/SMZ49}$ - 1, 2 Large groups of arcs and filaments near HH 1/2, a continuation of MHO 105/SMZ 49 Orion-A
MHO 115 05 36 17.8 -06 42 44 ${\rm 6-5/SMZ61}$ - 1, 2 Faint arc of emission 2-4$^\prime$ north of HH 1 Orion-A
MHO 116 05 36 11.5 -06 43 04 ${\rm 6-6/SMZ62}$ HH 3 1, 2 Compact bow shock to the north-west of HH 1/2 Orion-A
MHO 117 05 36 23.6 -06 43 12 ${\rm 6-7/SMZ60}$ HH 148 1, 2 Group of faint knots near very bright star in the NGC 1999 (HH 1/2) region Orion-A
MHO 118 05 36 27.8 -06 43 31 ${\rm 6-8}$ - 1, 2 Small, faint knot southeast of very bright star near HH 1/2 Orion-A
MHO 119 05 36 46.0 -06 44 18 ${\rm 6-9, DFS 121}$ HH 36 1, 2 Knotty bow shock $\sim $5$^\prime$ northeast of HH 1/2 Orion-A
MHO 120 05 36 20.7 -06 45 14 ${\rm 6-10/SMZ62/}$ HH 1 1, 2, 11, 12, 13, The bright and well-known HH 1 jet and bow shock Orion-A
      ${\rm SMZ64}$   14, 15, 16    
MHO 121 05 36 14.3 -06 44 27 ${\rm 6-11}$ - 1, 2 Two faint knots near HH 1/2 (MHO 120/125) Orion-A
MHO 122 05 36 23.6 -06 45 00 ${\rm 6-12/SMZ63}$ HH 147 12, 2, 1 Arc of knots $\sim $30 $^{\prime\prime}$ south-west of IR source in the NGC 1999 (HH 1/2) region Orion-A
MHO 123 05 36 18.9 -06 45 18 ${\rm 6-13/SMZ61}$ - 1, 2 Small faint knot near HH 1/2 (MHO 120/125) Orion-A
MHO 124 05 36 19.9 -06 46 00 ${\rm 6-14/SMZ65}$ HH 144 12, 2, 1 Sequence of faint knots/bow shocks with an east-west orientation near HH 1/2 Orion-A
MHO 125 05 36 25.5 -06 47 09 ${\rm 6-15/SMZ64}$ HH 2 11, 12, 2, 14, 1 The bright and well-known HH 2 cluster of knots. Orion-A
MHO 126 05 36 32.7 -06 53 21 ${\rm 6-16/SMZ49, DFS 124}$ - 1, 2 Knotty bow shock facing southeast; a possible extension of HH 1/2 (MHO 120/125) Orion-A
MHO 127 05 35 53.3 -06 57 00 ${\rm 6-17, DFS 125}$ - 1, 2 Two compact knots a few arcmin north of MHO 128 (to south-west of HH 1/2) Orion-A
MHO 128 05 35 50.0 -07 00 17 ${\rm 6-18, DFS 125}$ HH 127 1, 2 Small bow shocks aligned along the same axis as MHO 127 Orion-A
MHO 129 05 38 45.2 -06 59 30 ${\rm 7-1/SMZ66}$ - 1, 2 Faint filament in the L 1641-C cluster, part of collimated MHO 129-132 (SMZ 66) outflow Orion-A
MHO 130 05 38 48.2 -07 00 15 ${\rm 7-2/SMZ66}$ - 1, 2 Group of compact knots/bows in MHO 129-132 flow in L 1641-C Orion-A
MHO 131 05 38 52.8 -07 01 01 ${\rm 7-3/SMZ66}$ - 1, 2 Faint knots along MHO 129-132 flow in L 1641-C Orion-A
MHO 132 05 39 09.7 -07 04 38 ${\rm 7-4/SMZ66?}$ - 1, 2 Faint knot towards southeastern end of MHO 129-132 flow in L 1641-C Orion-A
MHO 133 05 37 47.0 -07 05 22 ${\rm 7-5/SMZ67}$ HH 64 1, 2 Knotty wing of HH bow shock in extensive HH 38/43/64 outflow Orion-A
MHO 134 05 37 51.6 -07 06 11 ${\rm 7-6/SMZ67}$ - 1, 2 Filaments along extensive HH 38/43/64 outflow Orion-A
MHO 135 05 38 00.2 -07 07 31 ${\rm 7-7/SMZ67}$ - 1, 2 Series of small bow shocks along axis of extensive HH 38/43/64 outflow Orion-A
MHO 136 05 38 04.3 -07 07 55 ${\rm 7-8/SMZ68}$ - 1, 2 Bow shock in flow parallel (and very close to) the HH 38/43/64 system Orion-A
MHO 137 05 38 05.4 -07 08 25 ${\rm 7-9/SMZ67}$ - 1, 2 Bow shock in the extensive HH 38/43/64 outflow Orion-A
MHO 138 05 38 11.1 -07 09 28 ${\rm 7-10/SMZ67}$ HH 43 17, 18, 1, 2 Bright complex group of knots and bow shocks in the extensive HH 38/43/64 outflow Orion-A
MHO 139 05 38 35.0 -07 09 14 ${\rm 7-11}$ - 1, 2 Two compact knots to east of (though not associated with) HH 43 Orion-A
MHO 140 05 39 05.0 -07 10 41 ${\rm 7-12/SMZ69}$ - 1, 2 Faint filament extending west of a young star south of L1641-C Orion-A
MHO 141 05 39 13.9 -07 11 11 ${\rm 7-13, DFS 129}$ - 1, 2 Faint knot or bow shock to the south of a young star in the L1641-C/HH43 area Orion-A
MHO 142 05 38 21.5 -07 11 35 ${\rm 7-14}$ HH 38 1, 19, 2 Arc of knots in the southeastern lobe of the HH 38/43/64 outflow Orion-A
MHO 143 05 38 41.5 -07 12 25 ${\rm 7-15/SMZ70}$ HH 449 1, 2 Emission in northern lobe of bipolar nebula in L1641-C/HH43 area, assoc. with MHO 144 Orion-A
MHO 144 05 38 45.3 -07 13 16 ${\rm 7-16/SMZ70}$ - 1, 2 Emission in southern lobe of bipolar nebula in L1641-C/HH43 area, assoc. with MHO 143 Orion-A
MHO 145 05 39 00.6 -07 20 18 ${\rm 8-1/SMZ71}$ - 1, 2 Faint knots and filaments, possibly an extension of HH 38/43/64 (MHO 142/138/133) Orion-A
MHO 146 05 39 39.5 -07 23 41 ${\rm 8-2/SMZ72(?)}$ - 1, 2 Faint, compact knot, possibly part of MHO 148 (SMZ 72) from Haro 4-255 FIR Orion-A
MHO 147 05 39 14.2 -07 25 41 ${\rm 8-3}$ - 1, 2 Faint feature $\sim $2$^\prime$ northwest of Haro 4-255 FIR Orion-A
MHO 148 05 39 22.5 -07 25 59 ${\rm 8-4/SMZ72}$ HH 469 20, 1, 2 Knotty jets and bow shocks from Haro 4-255 FIR Orion-A
MHO 149 05 39 28.3 -07 26 14 ${\rm 8-5}$ - 1, 2 Single knot to east of Haro 4-255 FIR Orion-A
MHO 150 05 39 28.9 -07 28 14 ${\rm 8-6/SMZ73}$ HH 470 1, 2 HH bow shock from cTTS Haro 4-255, very faint in H2 emission Orion-A
MHO 151 05 38 50.3 -07 32 00 ${\rm 8-7/SMZ72?}$ - 1, 2 Single knot, possible part of the counter-flow from Haro 4-255 FIR (MHO 148/SMZ 72) Orion-A
MHO 152 05 40 24.8 -07 20 22 ${\rm 9-1/SMZ74}$ - 1, 2 Small group of faint features orientated northeast-southwest; situated north of MHO 155-157 Orion-A
MHO 153 05 40 10.7 -07 21 45 ${\rm 9-2/SMZ74}$ - 1, 2 Three compact knots north of the major MHO 155-157 flow, possibly associated with MHO 152 Orion-A
MHO 154 05 40 25.8 -07 22 14 ${\rm 9-3/SMZ75/SMZ76?}$ - 1, 2 Two conical bow shocks just to the north of the major MHO 155-157 flow Orion-A
MHO 155 05 40 41.9 -07 23 41 ${\rm 9-4/SMZ76}$ - 1, 2 Spectacular knotty, curving filament near Re 50, probably associated with MHO 156 and MHO 157 Orion-A
MHO 156 05 40 28.2 -07 24 47 ${\rm 9-5/SMZ76}$ - 1, 2 Fainter knots and filaments that bridge the gap between MHO 155 and MHO 157 Orion-A
MHO 157 05 40 15.9 -07 24 25 ${\rm 9-6/SMZ76}$ HH 65 1, 2 Large, curving chain of bow shocks and knots near Re 50, associated with MHO 155 and MHO 156 Orion-A
MHO 158 05 40 21.2 -07 27 15 ${\rm 9-7, DFS 131}$ - 1 Three knots near Re 50, probably part of a northeast-pointing bow shock Orion-A
MHO 159 05 40 25.0 -07 27 57 ${\rm 9-8}$ - 1, 2 Three faint knots/features close to Re 50/Re 50N Orion-A
MHO 160 05 40 18.2 -07 27 48 ${\rm 9-9}$ - 1, 2 Faint filament extending south west from knot to west of Re 50N, possibly associated with MHO 158 Orion-A
MHO 161 05 40 29.6 -07 28 32 ${\rm 9-10}$ - 1, 2 Three faint wisps between Re 50 and Re 50N Orion-A
MHO 162 05 39 52.7 -07 31 25 ${\rm 9-11/SMZ76}$ - 1, 2 Three knotty features to south-west of Re 50, probably part of counter-flow to MHO 155-157 Orion-A
MHO 163 05 39 50.3 -07 33 27 ${\rm 9-13/SMZ76}$ - 1, 2 Group of knots and wisps of emission to south-west of Re 50, roughly aligned with MHO 162 Orion-A
MHO 164 05 39 44.3 -07 33 34 ${\rm 9-12/SMZ76}$ - 1, 2 Snaking chain of knots to south-west of Re 50 Orion-A
MHO 165 05 39 40.7 -07 35 25 ${\rm 9-14/SMZ76}$ - 1, 2 Arcuate knots and wisps of emission to south-west of Re 50 Orion-A
MHO 166 05 39 46.3 -07 36 53 ${\rm 9-15/SMZ76}$ - 1, 2 Diffuse emission to south-west of Re 50 Orion-A
MHO 167 05 34 28.4 -04 55 13 ${\rm DFS 101}$ - 2 Curving, collimated, knotty bipolar outflow to west of OMC 3 Orion-A
MHO 168 05 36 05.3 -05 04 41 ${\rm HH 128 IR-1/2/3,}$ HH 42 21, 4, 2 Bright bow shock and diffuse emission east of OMC 2/3 Orion-A
      ${\rm HH 129 IR, DFS102}$        
MHO 169 05 35 24.4 -05 08 39 ${\rm YBD 45, DFS 103}$ - 3, 2 Two adjacent, compact knots/bow shocks in OMC 2 Orion-A
MHO 170 05 33 58.9 -05 21 54 ${\rm DFS 105}$ - 2 Bow shock with extended wings situated to west of the Orion nebula Orion-A
MHO 171 05 32 41.6 -05 35 46 ${\rm DFS 110}$ - 2 Arc of bright knots, associated with Haro 4-145 and found west of the main OMC 1/2/3 ridge Orion-A
MHO 172 05 32 27.7 -05 34 55 ${\rm DFS 114}$ - 2 Faint, curving filament 4-5$^\prime$ west of Haro 4-145 and MHO 171 Orion-A
MHO 173 05 32 21.9 -05 34 53 ${\rm DFS 114}$ - 2 Faint, diffuse feature near MHO 172 Orion-A
MHO 174 05 32 22.7 -05 36 43 ${\rm DFS 114}$ - 2 Faint knots near MHO 172 Orion-A
MHO 175 05 35 33.7 -05 45 12 ${\rm DFS 112}$ - 2 Conical bow shock pointing towards the Southeast in OMC 4 Orion-A
MHO 176 05 34 59.7 -05 52 40 ${\rm DFS 113}$ - 2 Faint, very diffuse, bow-shaped feature in OMC 4/5 Orion-A
MHO 177 05 35 20.9 -06 18 23 ${\rm DFS 116}$ HH 40 11, 22, 2 Bright, elongated knot better known as HH 40 Orion-A
MHO 178 05 35 17.8 -06 17 39 ${\rm DFS 116}$ HH 33 11, 22, 2 Bright bow shock with diffuse emission; associated with HH 40/MHO 177 Orion-A
MHO 179 05 34 10.9 -06 33 39 ${\rm DFS 117}$ HH 84 2 Arc of emission to west of L 1641, possibly part of counter-flow to HH 83 Orion-A
MHO 180 05 34 12.4 -06 34 27 ${\rm DFS 117}$ - 2 Compact arcuate knots $\sim $1$^\prime$ Southeast of MHO 179/HH 84 Orion-A
MHO 181 05 33 32.3 -06 29 40 ${\rm DFS 117}$ HH 83 9, 2 Well-known outflow source and collimated, knotty jet, HH 83 Orion-A
MHO 182 05 36 22.1 -06 23 46 ${\rm DFS 118}$ - 2 Two small, nested bow shocks $\sim $20'' south of protostar in L 1641-N Orion-A
MHO 183 05 35 49.9 -06 34 54 ${\rm DFS 119}$ - 2 Compact knot next to protostar Orion-A
MHO 184 05 37 46.8 -06 53 32 ${\rm DFS 120}$ - 2 Two faint knots Orion-A
MHO 185 05 37 51.1 -06 47 30 ${\rm DFS 122}$ - 2 Compact/faint knots in counter-flow to MHO 186/HH 89; to east of NGC 1999 (HH 1/2) region Orion-A
MHO 186 05 37 47.2 -06 45 57 ${\rm DFS 122}$ HH 89 2 Collimated jet to east of NGC 1999 region, associated with conical nebula and MHO 185 Orion-A
MHO 187 05 37 32.4 -06 50 20 ${\rm DFS 123}$ - 2 Bright, complex, knotty structure located east of NGC 1999; part of MHO 187-189 Orion-A
MHO 188 05 37 14.6 -06 49 40 ${\rm DFS 123}$ - 2 Arc/bow shock and filament, part of MHO 187-189 Orion-A
MHO 189 05 37 03.8 -06 49 43 ${\rm DFS 123}$ - 2 Large, filamentary bow shocks, part of MHO 187-189 Orion-A
MHO 190 05 37 05.4 -06 55 58 ${\rm DFS 126}$ - 2 Bright bow to southeast of NGC 1999; extension of HH 38/43/64 (MHO 133/138/142)? Orion-A
MHO 191 05 37 56.8 -06 56 41 ${\rm DFS 127}$ - 2 Compact knot with tail near protostar Orion-A
MHO 192 05 37 59.0 -07 13 16 ${\rm DFS 128}$ - 2 Compact knots and (possible) faint bow shock to south Orion-A
MHO 193 05 40 10.4 -07 10 42 ${\rm DFS 130}$ - 2 Southeast-facing bow shock with extended wing Orion-A
MHO 194 05 39 10.2 -07 39 40 ${\rm DFS 132}$ - 2 Large bright complex of knots, filaments and bow shocks; possible counter-flow to MHO 155-157 Orion-A
MHO 195 05 38 47.9 -07 40 46 ${\rm DFS 132}$ - 2 Arc of emission, probably associated with MHO 194 Orion-A
MHO 196 05 41 06.2 -08 00 15 ${\rm DFS 134}$ - 2 Northward-facing bow shocks in collimated flow Orion-A
MHO 197 05 40 47.6 -08 04 37 ${\rm DFS 135}$ - 2 Collimated jet and bow shock (in counter-flow?) from bright IR source in L 1641-S Orion-A
MHO 198 05 40 47.5 -08 06 45 ${\rm DFS 138}$ - 2 Features near source of large MHO 201/202/203 bipolar outflow Orion-A
MHO 199 05 41 06.0 -08 06 39 ${\rm DFS 136}$ - 2 Faint, knotty flow that crosses MHO 200 in L 1641-S Orion-A
MHO 200 05 41 06.9 -08 06 08 ${\rm DFS 137}$ - 2 Faint flow that crosses MHO 199 in L 1641-S Orion-A
MHO 201 05 41 12.7 -08 12 05 ${\rm DFS 138}$ - 2 Knots and filaments in southeastern lobe of large bipolar flow (MHO 201-203) in L 1641-S Orion-A
MHO 202 05 40 32.5 -08 03 38 ${\rm DFS 138}$ - 2 Extended knots in northwestern lobe of bipolar flow (MHO 201-203) in L 1641-S Orion-A
MHO 203 05 40 12.2 -08 02 07 ${\rm DFS 138}$ - 2 Small group of knots in L 1641-S, possibly in the same flow lobe as MHO 202 Orion-A
MHO 204 05 41 24.8 -08 12 45 ${\rm DFS 139}$ - 2 Faint, curving filament in L 1641-S Orion-A
MHO 205 05 42 31.7 -08 01 20 ${\rm DFS 140}$ - 2 Elongated fingers of emission to east of the L 1641-S region Orion-A
MHO 206 05 39 48.5 -08 01 42 ${\rm DFS 142}$ - 2 Compact knots and faint bow shock to west of the L 1641-S region Orion-A
MHO 207 05 39 41.8 -08 02 54 ${\rm DFS 142}$ - 2 Faint knots and filament to west of the L 1641-S region, possibly assoc. with MHO 206 Orion-A
MHO 208 05 35 22.5 -05 08 03 ${\rm YBD 34, 1-22/SMZ15}$ HH 385 3, 1, 2 Bright, compact knots in OMC 2/3 Orion-A
MHO 209 05 35 25.7 -05 14 29 ${\rm YBD 56}$ - 3 Faint, compact knots in OMC 2/3 Orion-A
MHO 210 05 36 02.1 -05 02 53 ${\rm HH 41 IR}$ - 4 Faint feature in OMC 2/3 Orion-A
MHO 211 05 19 58.9 -05 52 20 ${\rm [HL] 10/8/11}$ HH 241 23, 24, 25 Knotty bow shocks in eastern lobe of bipolar outflow in L 1634 (assoc. with MHO 212) Orion-A
MHO 212 05 19 38.9 -05 51 29 ${\rm [HL] 1/2/3}$ HH 240 23, 24, 25 Nested bow shocks in western lobe of bipolar outflow in L 1634 (assoc. with MHO 211) Orion-A
MHO 213 05 19 56.9 -05 53 15 ${\rm [HL] 9}$ - 23 Faint feature northwest of the MHO 211/212 (assoc. with MHO 214?) Orion-A
MHO 214 05 19 45.9 -05 50 49 ${\rm [HL] 4}$ - 23 Faint feature southeast of the MHO 211/212 flow (assoc. with MHO 213?) Orion-A
MHO 215 05 36 18.4 -06 21 12 ${\rm 5-14/SMZ49/SMZ53}$ - 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 216 05 36 19.3 -06 21 28 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 217 05 36 20.2 -06 21 42 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 218 05 36 18.5 -06 21 40 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 219 05 36 19.2 -06 21 48 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 220 05 36 17.9 -06 21 49 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 221 05 36 18.3 -06 21 58 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 222 05 36 19.7 -06 23 25 ${\rm 5-14/SMZ49/SMZ53}$ - 20, 5, 1, 6, 7, 2 Part of a complex group; associated with at least two outflows in the L1641-N cluster Orion-A
MHO 223 05 42 47.8 -08 17 03 ${\rm - }$ - 26 Knotty bow shock to east of IRAS 05403+0818 in L 1641-S Orion-A

Notes. (a) Catalogue reference for the Molecular Hydrogen emission-line Object (MHO), with coordinates. (b) Other acronyms and labels used in the literature.

(c) Associated Herbig-Haro object, if any. (d) References to papers presenting near-IR images, listed chronologically (including papers citing other IDs); see the full list of references at the end of Table A15.


Source LaTeX | All tables | In the text

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