Astronomy:Gliese 69
From HandWiki
Short description: Star in the constellation Cassiopeia
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 01h 43m 40.72450s[1] |
| Declination | +63° 49′ 24.2390″[1] |
| Apparent magnitude (V) | 8.40[2] |
| Characteristics | |
| Spectral type | K5 Vbe[2] |
| U−B color index | +1.12[3] |
| B−V color index | +1.22[3] |
| Astrometry | |
| Radial velocity (Rv) | −50.827 ± 0.0075[4] km/s |
| Proper motion (μ) | RA: −394.73[1] mas/yr Dec.: −582.26[1] mas/yr |
| Parallax (π) | 73.65 ± 0.98[1] mas |
| Distance | 44.3 ± 0.6 ly (13.6 ± 0.2 pc) |
| Details | |
| Mass | 0.624[5] M☉ |
| Radius | 0.59[5] R☉ |
| Surface gravity (log g) | 4.70[5] cgs |
| Temperature | 4312[6] K |
| Metallicity [Fe/H] | −0.39[6] dex |
| Age | 6.89 ± 4.70[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 69 is a star located in the constellation of Cassiopeia. It has an apparent magnitude of 8.40.[2] Parallax measurements by Hipparcos put it at a distance of 44.3 light-years (13.6 parsecs) away.[1]
Gliese 69 is a K-type main-sequence star that is smaller and less massive than the Sun.[5] It glows with an effective temperature of 4,312 K.[6] It is around 6.9 billion years old,[6] significantly older than the Sun. Gliese 69 is also known by its designations HD 10436 and LHS 1291.[7]
Planetary System
In 2019 one candidate planet been detected by the radial velocity method.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.3+3.7 −3.2 M⊕ |
0.043±0.004 | 3.84237+0.00085 −0.00054 |
0.03+0.20 −0.03 |
— | — |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series 71: 245. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K.
- ↑ 3.0 3.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M.
- ↑ Soubiran, C.; Jasniewicz, G.; Chemin, L.; Crifo, F.; Udry, S.; Hestroffer, D.; Katz, D. (2013). "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release". Astronomy & Astrophysics 552: A64. doi:10.1051/0004-6361/201220927. Bibcode: 2013A&A...552A..64S.
- ↑ 5.0 5.1 5.2 5.3 Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (February 2007). "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog". The Astrophysical Journal Supplement Series 168 (2): 297–318. doi:10.1086/509763. Bibcode: 2007ApJS..168..297T.
- ↑ 6.0 6.1 6.2 6.3 6.4 Pace, G. (March 2013). "Chromospheric activity as age indicator. An L-shaped chromospheric-activity versus age diagram". Astronomy & Astrophysics 551: 4. doi:10.1051/0004-6361/201220364. L8. Bibcode: 2013A&A...551L...8P.
- ↑ 7.0 7.1 "HD 10436". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+10436.
- ↑ Barnes, J. R. et al. (2019-06-11) (in en). Frequency of planets orbiting M dwarfs in the Solar neighbourhood. Bibcode: 2019arXiv190604644T.
Company, Sol. "Research: K stars within 100 light-years". http://www.solstation.com/stars3/100-ks.htm. Retrieved 24 July 2011.
 |  |
