| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 39m 35.252s[1] |
| Declination | –35° 25′ 43.64″[1] |
| Apparent magnitude (V) | 18.69 |
| Characteristics | |
| Spectral type | M9β[2] |
| Apparent magnitude (g) | 19.7263±0.0083[3] |
| Apparent magnitude (r) | 17.1191±0.0010[3] |
| Apparent magnitude (i) | 16.8189±0.0014[3] |
| Apparent magnitude (z) | 15.6215±0.0011[3] |
| Apparent magnitude (Y) | 14.5973±0.0014[3] |
| Apparent magnitude (J) | 10.725±0.021[4] |
| Apparent magnitude (H) | 10.017±0.021[4] |
| Apparent magnitude (K) | 9.548±0.023[4] |
| Astrometry | |
| Radial velocity (Rv) | 7.43±0.72[2] km/s |
| Proper motion (μ) | RA: 309.001(50) mas/yr[1] Dec.: 269.058(64) mas/yr[1] |
| Parallax (π) | 155.5982 ± 0.0522 mas[1] |
| Distance | 20.961 ± 0.007 ly (6.427 ± 0.002 pc) |
| Absolute magnitude (MV) | 20.02 |
| Details[5] | |
| Mass | 29.62±16.67[2] MJup |
| Temperature | 2,650 ± 30 K (2,376.8 ± 30.0 °C; 4,310.3 ± 54.0 °F) K |
| Rotation | 3.8291±0.0084 h[6] |
| Rotational velocity (v sin i) | 28±4 km/s |
| Age | 320 ±80 million years |
| Other designations | |
LP 944-20, SIPS J0339−3525, LEHPM 3451, 2MASSI J0339352−352544, [B2006] J033935.2−352544, APMPM J0340−3526, 2MASS J03393521-3525440, 2MASSW J0339352−352544, BRI B0337−3535, BRI 0337−3535, 2MUCD 10201, Gaia DR2 4860376345833699840 | |
| Database references | |
| SIMBAD | data |
  LP 944-20 Location of LP 944-20 in the constellation Fornax | |
LP 944-20 is a dim brown dwarf of spectral class M9 located 21 light-years from the Solar System in the constellation of Fornax. With a visual apparent magnitude of 18.69, it has one of the dimmest visual magnitudes listed on the RECONS page. It is one of the brightest brown dwarfs, if not the brightest at JMKO=10.68±0.03 mag.[7]
- ^ a b c d Cite error: The named reference
GaiaDR3was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Faherty2016was invoked but never defined (see the help page). - ^ a b c d e Abbott, T. M. C.; Adamów, M.; Aguena, M.; Allam, S.; Amon, A.; Annis, J.; Avila, S.; Bacon, D.; Banerji, M.; Bechtol, K.; Becker, M. R.; Bernstein, G. M.; Bertin, E.; Bhargava, S.; Bridle, S. L. (2021-08-01). "The Dark Energy Survey Data Release 2". The Astrophysical Journal Supplement Series. 255 (2): 20. arXiv:2101.05765. Bibcode:2021ApJS..255...20A. doi:10.3847/1538-4365/ac00b3. ISSN 0067-0049.
- ^ a b c Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Guenther2009was invoked but never defined (see the help page). - ^ Cite error: The named reference
Fetherolf2023was invoked but never defined (see the help page). - ^ Sanghi, Aniket; Liu, Michael C.; Best, William M. J.; Dupuy, Trent J.; Siverd, Robert J.; Zhang, Zhoujian; Hurt, Spencer A.; Magnier, Eugene A.; Aller, Kimberly M.; Deacon, Niall R. (2023). "Table of Ultracool Fundamental Properties". Zenodo. doi:10.5281/zenodo.10086810.