Astronomy:Gliese 54
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Tucana |
| Right ascension | 01h 10m 22.8809s[1] |
| Declination | −67° 26′ 41.9487″[1] |
| Apparent magnitude (V) | 9.80 |
| Characteristics | |
| Spectral type | M2.5 (composite) |
| Astrometry | |
| Proper motion (μ) | RA: 386.2±0.2[2] mas/yr Dec.: 579.7±0.1[2] mas/yr |
| Parallax (π) | 126.9 ± 0.4[2] mas |
| Distance | 25.70 ± 0.08 ly (7.88 ± 0.02 pc) |
| Absolute magnitude (MV) | +10.23 |
| Orbit[3] | |
| Primary | Gliese 54 A |
| Companion | Gliese 54 B |
| Period (P) | 1.14434+0.00022−0.00022 yr |
| Semi-major axis (a) | 0.12619±0.00039" (1.00 AU) |
| Eccentricity (e) | 0.1718±0.0024 |
| Inclination (i) | 125.32+0.35−0.35° |
| Details[4] | |
| Gliese 54 A | |
| Mass | 0.43 M☉ |
| Radius | 0.51 R☉ |
| Temperature | 4250 K |
| Metallicity | 0.17[3] |
| Rotational velocity (v sin i) | -15.0 km/s |
| Gliese 54 B | |
| Mass | 0.3 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 54 (GJ 54 / HIP 5496 / LHS 1208)[5] is a star near the Solar System located at 25.7 light years away.[2] It is located in the constellation of Tucana, close to the edge, almost in the neighboring Hydrus. It is below the threshold of brightness to be observable to the naked eye with an apparent magnitude of +9.80.[5]
Gliese 54 is a red dwarf of spectral type M2 with an effective temperature of 4250 K.[6] In the SIMBAD database it appears listed as a variable star, getting the provisional variable designation NSV 427.[5] It has a companion with which it forms a binary system whose orbital period is 427 ± 9 days. The companion, a red dwarf whose brightness is ~1 magnitude lower than Gliese 54, has been resolved with the instrument NICMOS installed in the Hubble Space Telescope.[7]
The known stars closest to Gliese 54 are ζ Tucanae, solar analog 3.1 light years, and β Hydri 5.1 light years[8]
See also
References
- ↑ 1.0 1.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Benedict, G. F. et al. (2016). "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs". The Astronomical Journal 152 (5): 141. doi:10.3847/0004-6256/152/5/141. Bibcode: 2016AJ....152..141B.
- ↑ 3.0 3.1 Mann, Andrew W.; Dupuy, Trent; Kraus, Adam L.; Gaidos, Eric; Ansdell, Megan; Ireland, Michael; Rizzuto, Aaron C.; Hung, Chao-Ling et al. (2019), "How to constrain your M dwarf. II. The Mass-Luminosity-Metallicity relation from 0.075 to 0.70 solar masses", The Astrophysical Journal 871 (1): 63, doi:10.3847/1538-4357/aaf3bc, Bibcode: 2019ApJ...871...63M
- ↑ Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L. et al. (2018), "The Solar Neighborhood XLIV: RECONS Discoveries within 10 Parsecs", The Astronomical Journal 155 (6): 265, doi:10.3847/1538-3881/aac262, Bibcode: 2018AJ....155..265H
- ↑ 5.0 5.1 5.2 "CD-68 47". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CD-68+47.
- ↑ Morales, J. C.; Ribas, I.; Jordi, C. (2008). "The effect of activity on stellar temperatures and radii". Astronomy and Astrophysics 478 (2): 507. doi:10.1051/0004-6361:20078324. pp. 507-512 (Table consulted on CDS). Bibcode: 2008A&A...478..507M.
- ↑ Golimowski, David A.; Henry, Todd J.; Krist, John E.; Dieterich, Sergio; Ford, Holland C.; Illingworth, Garth D.; Ardila, David R.; Clampin, Mark et al. (2004). "The Solar Neighborhood. IX. Hubble Space Telescope Detections of Companions to Five M and L Dwarfs Within 10 parsecs of the Sun". The Astronomical Journal 128 (4): 1733–1747. doi:10.1086/423911. Bibcode: 2004AJ....128.1733G.
- ↑ Stars Within 15 light-years of Cape Photographic Durchmusterung -68 ° 41 (The Internet Stellar Database)
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