Astronomy:85 Geminorum
From HandWiki
Short description: A-type main-sequence star in constellation Gemini
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Gemini |
| Right ascension | 07h 55m 39.89s[1] |
| Declination | +19° 53′ 02.3″[1] |
| Apparent magnitude (V) | 5.365±0.009[2] |
| Characteristics | |
| Evolutionary stage | main-sequence |
| Spectral type | A0Vs[3] |
| Astrometry | |
| Radial velocity (Rv) | 12.3[1] km/s |
| Proper motion (μ) | RA: -15.114[1] mas/yr Dec.: -39.83[1] mas/yr |
| Parallax (π) | 6.4022 ± 0.1333[4] mas |
| Distance | 510 ± 10 ly (156 ± 3 pc) |
| Details[5] | |
| Mass | 3.29 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
85 Geminorum (85 Gem) is an A-type main-sequence star located approximately 510 light-years from Earth in the constellation of Gemini.[1] It is a relatively bright star with an apparent visual magnitude of approximately 5.37, making it visible to the naked eye under dark skies.[2]
Observation
In 2005, 85 Geminorum was observed by NASA Infrared Telescope Facility and has served as an A0V spectrophotometric standard star[6] in infrared spectroscopy to calibrate spectra of M, L, and T dwarf stars.[6]
In a 2022 survey of visual binaries among intermediate-mass stars, 85 Geminorum was included with an estimated mass of approximately 3.29 M☉,[5] placing it in the A-type stars mass range. Although, no companion stars have been detected.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "* 85 Gem". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+85+Gem.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars" (in en). Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal 74: 375. doi:10.1086/110819. Bibcode: 1969AJ.....74..375C.
- ↑ European Space Agency; Gaia collaboration (2020), Gaia EDR3, Centre de Donnees Strasbourg (CDS), doi:10.26093/CDS/VIZIER.1350, https://cdsarc.cds.unistra.fr/viz-bin/cat/I/350, retrieved 2026-04-14
- ↑ 5.0 5.1 5.2 Duchêne, Gaspard; Oon, Jner Tzern; De Rosa, Robert J; Kantorski, Patrick; Coy, Brandon; Wang, Jason J; Thomas, Sandrine; Patience, Jenny et al. (2022-12-16). "A low-mass companion desert among intermediate-mass visual binaries: The scaled-up counterpart to the brown dwarf desert" (in en). Monthly Notices of the Royal Astronomical Society 519 (1): 778–798. doi:10.1093/mnras/stac3527. ISSN 0035-8711.
- ↑ 6.0 6.1 Cushing, Michael C.; Rayner, John T.; Vacca, William D. (2005-04-20). "An Infrared Spectroscopic Sequence of M, L, and T Dwarfs" (in en). The Astrophysical Journal 623 (2): 1115–1140. doi:10.1086/428040. ISSN 0004-637X. Bibcode: 2005ApJ...623.1115C.
 |  |
