WISE J004945.61+215120.0
Coordinates: 
00h 49m 45.61s, +21° 51′ 20″
| Observation data Epoch J2000[1] Equinox J2000[1] | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 49m 45.61s[1] |
| Declination | 21° 51′ 20″[1] |
| Characteristics | |
| Spectral type | T8.5[1][2] |
| Astrometry | |
| Distance | ~ 24.1[1] ly (~ 7.4[1] pc) |
| Other designations | |
WISE J004945.61+215120.0 is a brown dwarf of spectral class T8.5,[1][2] located in constellation Andromeda at approximately 24 light-years from Earth.[1]
Discovery
WISE J004945.61+215120.0 was discovered in 2012 by Mace et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. The discovery paper in not yet published.[2]
Distance
Trigonometric parallax of WISE J004945.61+215120.0 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).
WISE J004945.61+215120.0 distance estimates
| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|
| Kirkpatrick et al. (2012), Tables 4 & 8 | 7.4 | 24.1 | [1] |
Non-trigonometric distance estimates are marked in italic.
References
- 1 2 3 4 5 6 7 8 9 10 11 Kirkpatrick, J. D.; Gelino, C. R.; Cushing, M. C.; Mace, G. N.; Griffith, R. L.; Skrutskie, M. F.; Marsh, K. A.; Wright, E. L.; Eisenhardt, P. R.; McLean, I. S.; Mainzer, A. K.; Burgasser, A. J.; Tinney, C. G.; Parker, S.; Salter, G. (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122
. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. - 1 2 3 Mace et al., in prep.