Astronomy:WISEPA J031325.96+780744.2
Coordinates: 
03h 13m 26.02s, +78° 07′ 44.4″
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 03h 13m 26.02s[1] |
| Declination | 78° 07′ 44.4″[1] |
| Characteristics | |
| Spectral type | T8.5[1][2] |
| Apparent magnitude (J (2MASS filter system)) | 17.65 ± 0.07[1] |
| Apparent magnitude (H (2MASS filter system)) | 17.63 ± 0.06[1] |
| Astrometry | |
| Proper motion (μ) | RA: 71.1 ± 1.2[3] mas/yr Dec.: 54.8 ± 1.2[3] mas/yr |
| Parallax (π) | 134.3 ± 3.6[3] mas |
| Distance | 24.3 ± 0.7 ly (7.4 ± 0.2 pc) |
| Other designations | |
WISEPA J031325.96+780744.2 (designation abbreviated to WISE 0313+7807, or WISE J0313+7807) is a brown dwarf of spectral class T8.5,[1][2] located in constellation Cepheus at approximately 21 light-years from Earth.[4]
Discovery
WISE 0313+7807 was discovered in 2011 by J. Davy Kirkpatrick 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 2011 Kirkpatrick et al. published a paper in The Astrophysical Journal Supplement, where they presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 0313+7807.[1][note 1]
Distance
Currently the most accurate distance estimate of WISEPA J031325.96+780744.2 is a trigonometric parallax, published in 2019 by Kirkpatrick et al.: 134.3 ± 3.6 mas, corresponding to 7.4+0.2
−0.2 pc, or 24.3+0.7
−0.6 ly.[3]
| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|
| Beichman et al. (2014) | 153 ± 15 | 6.5+0.7−0.6 | 21.3+2.3−1.9 | [4] |
| Kirkpatrick et al. (2019) | 134.3 ± 3.6 | 7.4+0.2−0.2 | 24.3+0.7−0.6 | [3] |
The best estimate is marked in bold.
Notes
- ↑ This 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries was published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries was published later.
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, Amy K. et al. (2011). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". The Astrophysical Journal Supplement 197 (2): 19. doi:10.1088/0067-0049/197/2/19. Bibcode: 2011ApJS..197...19K.
- ↑ 2.0 2.1 Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L. et al. (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. doi:10.1088/0004-637X/753/2/156. Bibcode: 2012ApJ...753..156K.
- ↑ 3.0 3.1 3.2 3.3 3.4 Kirkpatrick, J. Davy 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. doi:10.3847/1538-4365/aaf6af. 19. Bibcode: 2019ApJS..240...19K.
- ↑ 4.0 4.1 Beichman, Charles A.; Gelino, Christopher R.; Kirkpatrick, J. Davy; Cushing, Michael C.; Dodson-Robinson, Sally; Marley, Mark S.; Morley, Caroline V.; Wright, Edward L. (2014). "WISE Y Dwarfs As Probes of the Brown Dwarf-Exoplanet Connection". The Astrophysical Journal 783 (2): 68. doi:10.1088/0004-637X/783/2/68. Bibcode: 2014ApJ...783...68B.
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