UGPS J0521+3640
UGPS J0521+3640 is a nearby brown dwarf of spectral class T8.5, located in the constellation Auriga. It was discovered in 2011 using United Kingdom Infrared Telescope (UKIRT), UKIRT Infrared Deep Sky Survey (UKIDSS), UGPS (UKIDSS Galactic Plane Survey) component, 6th data release.[1]
| Observation data Epoch 2007.82 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 21m 27.27s[1] |
| Declination | +36° 40′ 48.6″[1] |
| Characteristics | |
| Spectral type | T8.5[1] |
| Apparent magnitude (J (UKIDSS filter system)) | 16.94 ± 0.02[1] |
| Apparent magnitude (H (UKIDSS filter system)) | 17.28 ± 0.04[1] |
| Apparent magnitude (K (UKIDSS filter system)) | 17.32 ± 0.09[1] |
| Astrometry | |
| Proper motion (μ) | RA: 569.0±0.9 mas/yr[2] Dec.: −1511.0±1.0 mas/yr[2] |
| Parallax (π) | 122.2 ± 1.6 mas[2] |
| Distance | 26.7 ± 0.3 ly (8.2 ± 0.1 pc) |
| Details[1] | |
| Mass | 14–32 MJup |
| Radius | 0.8–1.0 RJup |
| Surface gravity (log g) | 4.5–5.0 cgs |
| Temperature | 600–650 K |
| Database references | |
| SIMBAD | data |
Its photometric distance estimate is 8.2+1.2
−1.0 pc, or 26.7+3.9
−3.3 ly.[1] Based on its parallax measured in 2019, its distance is 26.7 ± 0.3 light-years (8.186 ± 0.092 parsecs).[2]
References
- Burningham, Ben; Lucas; Leggett; Smart; Baker; Pinfield; Tinney; Homeier; Allard; Zhang; Gomes; Day-Jones; Jones; Kovacs; Lodieu; Marocco; Murray; Sipocz (2011). "The discovery of the T8.5 dwarf UGPS J0521+3640". Monthly Notices of the Royal Astronomical Society: Letters. 414 (1): L90–L94. arXiv:1104.1526. Bibcode:2011MNRAS.414L..90B. doi:10.1111/j.1745-3933.2011.01062.x. S2CID 18008503.
- 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.
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