Table 2
Data for the currently known MW satellites.
Name | α 2000 | δ 2000 | r helio | l MW | b MW | r MW | Ref. |
![]() |
![]() |
Δv | Ref. | L V | Ref. |
[h m s] | [° m s] | [kpc] | [°] | [°] | [kpc] | [kms-1] | [km s-1] | [kms-1] | [L⊙] | ||||
|
|||||||||||||
New: | |||||||||||||
Boo | 14 00 05 | +14 30 21 | 64 ± 2 | 357.9 | 76.5 | 61 | 2; 10; 28; 8 | 94.4 | 94.2 | ±3.4 | 21 | (2.6 ± 0.5) × 104 | 2; 18 |
Boo II | 13 58 05 | +12 51 36 | 45 ± 2 | 348.6 | 78.9 | 43 | 30; 31; 14 | (9.2 ± 5.4) × 102 | 30; 18; 31 | ||||
CVn | 13 28 04 | +33 33 27 | 214 ± 9 | 84.2 | 80.0 | 213 | 36; 8; 16; 17 | 64.8 | 69, 7 | ±0.6 | 13; 29 | (2.0 ± 0.3) × 105 | 36; 18 |
CVn II | 12 57 10 | +34 19 20 | 154 ± 5 | 129.4 | 81.3 | 155 | 25; 3; 12; 8 | –97, 5 | –93,2 | ±1.2 | 29 | (7.5 ± 3.1) × 103 | 25; 3; 18 |
CBe | 12 26 59 | +23 54 37 | 43 ± 2 | 202.2 | 75.5 | 44 | 3; 8; 23 | 47, 4 | 40, 4 | ±0.9 | 29 | (3.1 ± 1.1) × 103 | 3; 18; 22 |
Her | 16 31 04 | +12 47 24 | 135 ± 4 | 31.2 | 38.2 | 129 | 3; 7; 8; 1; 26 | 128, 6 | 140, 0 | ±1.1 | 29; 1 | (2.9 ± 0.7) × 104 | 3; 18; 26 |
Leo IV | 11 32 58 | –00 32 09 | 156 ± 5 | 261.1 | 56.3 | 156 | 3; 20 | 10, 6 | –6, 0 | ±1.4 | 29 | (1.3 ± 0.3) × 104 | 3; 18; 27; 9 |
Leo V | 11 31 09 | +02 13 05 | 176 ± 10 | 257.9 | 58.3 | 176 | 4; 9 | 58, 5 | 42, 8 | ±3.1 | 4 | (6.4 ± 2.4) × 103 | 4; 9 |
Pis I | 23 40 00 | –00 18 00 | 80 ± 14 | 100.2 | –57.8 | 80 | 32; 15 | 42, 1 | 58, 0 | 15 | |||
Pis II | 22 58 31 | +05 57 09 | 182 ± 36∗ | 84.1 | –47.6 | 181 | 6 | ~ 8.6 × 103 | 6 | ||||
Seg I | 10 07 04 | +16 04 40 | 23 ± 2 | 206.2 | 39.5 | 28 | 3 | 94, 5 | 79, 3 | ±1.3 | 11 | (3.4 ± 2.7) × 102 | 3; 18 |
Seg II | 02 19 16 | +20 10 31 | 35 ± 2 | 157.0 | –31.1 | 41 | 5 | 54, 8 | 67, 6 | ±2.5 | 5 | (8.6 ± 2.7) × 102 | 5 |
UMa | 10 34 49 | +51 55 48 | 100 ± 4 | 162.0 | 51.3 | 105 | 34; 29; 24 | –6, 9 | –0, 3 | ±1.4 | 29 | (1.4 ± 0.4) × 104 | 18 |
UMa II | 08 51 30 | +63 08 22 | 30 ± 5 | 159.7 | 30.4 | 37 | 35 | –29, 0 | –17, 1 | ±1.9 | 29 | (3.3 ± 1.0) × 103 | 35; 18; 22 |
Wil1 | 10 49 22 | +51 03 10 | 41 ± 6 | 164.4 | 48.8 | 46 | 33; 8 | (1.1 ± 0.6) × 103 | 33; 18 | ||||
|
|||||||||||||
Classical: | |||||||||||||
Car† | 06 41 37 | –50 58 00 | 101 ± 5 | 255.2 | –21.7 | 103 | 19 | 22, 5 | –4, 9 | ±3 | 19 | 4.5 × 104 | 19 |
Dra† | 17 20 19 | +57 54 48 | 82 ± 6 | 93.5 | 34.6 | 82 | 19 | –112, 3 | –87, 7 | ±2 | 19 | 2.8 × 105 | 19 |
For† | 02 39 59 | –34 27 00 | 138 ± 8 | 230.0 | –63.4 | 140 | 19 | –29,2 | –40, 4 | ±3 | 19 | 1.6 × 107 | 19 |
Leo I | 10 08 27 | +12 18 30 | 250 ± 30 | 224.7 | 48.6 | 254 | 19 | 179, 9 | 165, 4 | ±2 | 19 | 4.9 × 106 | 19 |
Leo II | 11 13 29 | +22 09 12 | 205 ± 12 | 217.5 | 66.1 | 208 | 19 | 17, 0 | 9, 0 | ±2 | 19 | 5.9 × 105 | 19 |
LMC† | 05 23 34 | –69 45 24 | 49 ± 2 | 268.5 | –33.4 | 48 | 19 | 143, 3 | 118, 6 | 19 | 2.1 × 109 | 37 | |
SMC† | 00 52 44 | –72 49 42 | 58 ± 2 | 291.6 | –47.4 | 55 | 19 | 49, 6 | 32, 5 | 19 | 5.7 × 108 | 37 | |
Sgr† | 18 55 03 | –30 28 42 | 24 ± 2 | 9.4 | –22.4 | 16 | 19 | 161, 1 | 164, 0 | ±5 | 19 | 2.0 × 107 | 19 |
Scu† | 01 00 09 | –33 42 30 | 79 ± 4 | 234.6 | –81.9 | 79 | 19 | 77, 9 | 73, 8 | ±3 | 19 | 2.4 × 106 | 19 |
Sex | 10 13 03 | –01 36 54 | 86 ± 4 | 237.8 | 40.8 | 89 | 19 | 76, 9 | 56, 4 | ±3 | 19 | 5.4 × 105 | 19 |
UMi† | 15 09 11 | +67 12 54 | 66 ± 3 | 114.2 | 43.2 | 68 | 19 | –92, 9 | –71, 7 | ±2 | 19 | 3.1 × 105 | 19 |
Notes. Data for the MW satellites used for fitting the DoS. Seg 1 and 2
(marked in italics) are included in this list for reference, but they
have not been included in the fitting because they appear to be diffuse star clusters
(Niederste-Ostholt et al. 2009). The
positions are given both in Heliocentric coordinates (right ascension
α2000, declination δ2000,
and Heliocentric distance rhelio for epoch J2000.0) and in
Galactocentric coordinates assuming the Sun to have a distance of 8.5 kpc from the MW
centre. lMW gives the Galactic longitude with
0° pointing from the Galactic centre to the Sun.
bMW is the latitude as seen from the Galactic centre and
rMW the radial distance from the centre of the MW. The
coordinates were obtained using data from the references listed in the column labelled
Ref., where more than one source is given, the distances to the satellites were
obtained by error-weighted averaging over the available measurements. The satellite’s
line-of-sight velocities with respect to the Galactic standard of rest (GSR) are
calculated assuming the Sun to move into the direction l = 90°,
b = 0° (in Heliocentric, Galactic coordinates) with a velocity of
either 220 km s-1 () or 250 km-1 (
). The measurement-uncertainties for the radial
velocities reported in the respective papers (referred to in column Ref.) are
reproduced in the column labelled Δv. Finally,
LV gives the satellite luminosities in the photometric
V-band; again uncertainty-weighted averages are quoted when more
than one reference is given in column Ref. Data marked with † have measured proper
motions, listed in Table 1 of Metz et al.
(2008). ∗: As no distance uncertainties for Pisces II are
available in the literature, the error is estimated to be 20 percent of the
distance.
References. 1: Adén et al. (2009a), 2: Belokurov et al. (2006), 3: Belokurov et al. (2007), 4: Belokurov et al. (2008), 5: Belokurov et al. (2009), 6: Belokurov et al. (2010), 7: Coleman et al. (2007b), 8: de Jong et al. (2008), 9: de Jong et al. (2010), 10: Dall’Ora et al. (2006), 11: Geha et al. (2009), 12: Greco et al. (2008), 13: Ibata et al. (2006), 14: Koch et al. (2009), 15: Kollmeier et al. (2009), 16: Kuehn et al. (2008), 17: Martin et al. (2008a), 18: Martin et al. (2008b), 19: Mateo (1998), 20: Moretti et al. (2009), 21: Muñoz et al. (2006), 22: Muñoz et al. (2010), 23: Musella et al. (2009), 24: Okamoto et al. (2008), 25: Sakamoto & Hasegawa (2006), 26: Sand et al. (2009), 27: Sand et al. (2010), 28: Siegel (2006), 29: Simon & Geha (2007), 30: Walsh et al. (2007), 31: Walsh et al. (2008), 32: Watkins et al. (2009), 33: Willman et al. (2005a), 34: Willman et al. (2005b), 35: Zucker et al. (2006a), 36: Zucker et al. (2006b), 37: van den Bergh (1999).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.