Table 3
Orion groups and clusters.
| Name | RA | Dec | Age | Distance | Reference |
| (J2000) | (J2000) | (Myr) | (pc) | ||
|
|
|||||
| Orion A | |||||
|
|
|||||
| NGC 1980 | 83
 80 |
–5
 95 |
5 ~ 10 | ~380 | (1) |
| NGC 1981 | 8378 |
–434 |
5 ± 1 | 380 ± 17 | (2) |
| Group 189 | 8384 |
–471 |
... | ... | (3) |
| L1641N | 8394 |
–628 |
2 ~ 3 | ... | (4) |
| Trapezium | 8384 |
–540 |
1 ~ 3 | 390 ~ 440 | (4), (5), (6) |
| OMC 2 | 8386 |
–517 |
≲1 | 420 ~ 450 | (4), (6), (7) |
| OMC 3 | 8379 |
–492 |
≲1 | 420 ~ 450 | (4), (6), (7) |
| L1641W | 8369 |
–628 |
5 ~ 10 | ~380? | (1) |
| OriA-Fore 1 | 8362 |
–497 |
5 ~ 10 | ~380? | (1) |
|
|
|||||
| Ori OB1abc & λ −Ori | |||||
|
|
|||||
| Collinder 80 | 8388 |
–110 |
1 ~ 7 | 385 | (8) |
| σ-Ori | 8469 |
–260 |
3 ~ 5 | 385 | (8) |
| Collinder 69 | 8377 |
+993 |
5 ~ 10 | 400 | (9) |
| 25 Ori | 8119 |
+185 |
7 ~ 10 | 380 | (10) |
Reference. (1) This work; (2) Maia et al. (2010); (3) Chupina & Vereshchagin (2000); (4) Gomez & Lada (1998); (5) Hirota et al. (2007); (6) Menten et al. (2007); (7) Peterson & Megeath (2008); (8) Caballero & Solano (2008); (9) Barrado y Navascués et al. (2007); (10) Briceño et al. (2007).
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