WISE J004945.61+215120.0 is a brown dwarf of spectral class T8.5,[1] located in constellation Andromeda at approximately 24 light-years from Earth.[1]
| 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] |
| Astrometry | |
| Proper motion (μ) | RA: -483.2 mas/yr Dec.: -46.5 mas/yr |
| Parallax (π) | 139.9 ± 2.5 mas[2] |
| Distance | 23.3 ± 0.4 ly (7.1 ± 0.1 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
Discovery
editWISE 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. In 2013, the discovery paper was published.[3]
Distance
editCurrently the most accurate distance estimate of WISE J004945.61+215120.0 is a trigonometric parallax, published in 2019 by Kirkpatrick et al.: 7.1+0.1
−0.1 pc, or 23.3+0.4
−0.4 ly.[2]
References
edit- ^ a b c d e f g h Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (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. S2CID 119279752.
- ^ a b Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. (February 2019). "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime". The Astrophysical Journal Supplement Series. 240 (2): 69. arXiv:1812.01208. Bibcode:2019ApJS..240...19K. doi:10.3847/1538-4365/aaf6af. 19.
- ^ Mace, Gregory N.; Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; mix, Katholeen; Bailey, Vanessa; Beichman, Charles A.; Bloom, Joshua S.; Burgasser, Adam J.; Fortney, Jonathan J.; Hinz, Philip M.; Knox, Russell P.; Lowrance, Patrick J.; Marley, Mark S.; Morley, Caroline V.; Rodigas, Timothy J.; Saumon, Didier; Sheppard, Scott S.; Stock, Nathan D. (2013). "A Study of the Diverse T Dwarf Population Revealed by WISE". The Astrophysical Journal Supplement Series. 205 (6): 1–49. arXiv:1301.3913. Bibcode:2013ApJS..205....6M. doi:10.1088/0067-0049/205/1/6. S2CID 10535516.