Gliese 69 - Misplaced Pages

Star in the constellation Cassiopeia

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Gliese 69
Observation data Epoch J2000 Equinox J2000
Constellation	Cassiopeia
Right ascension	01 43 40.72450
Declination	+63° 49′ 24.2390″
Apparent magnitude (V)	8.40
Characteristics
Spectral type	K5 Vbe
U−B color index	+1.12
B−V color index	+1.22
Astrometry

Radial velocity (R_v)	−50.827 ± 0.0075 km/s
Proper motion (μ)	RA: −394.73 mas/yr Dec.: −582.26 mas/yr
Parallax (π)	73.65 ± 0.98 mas
Distance	44.3 ± 0.6 ly (13.6 ± 0.2 pc)

Details

Mass	0.624 `M`_☉
Radius	0.59 `R`_☉
Surface gravity (log g)	4.70 cgs
Temperature	4312 K
Metallicity	−0.39 dex
Age	6.89 ± 4.70 Gyr

Other designations
BD+63° 229, GJ 69, HD 10436, HIP 8070, SAO 11943, LHS 1291.
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. Parallax measurements by Hipparcos put it at a distance of 44.3 light-years (13.6 parsecs) away.

Gliese 69 is a K-type main-sequence star that is smaller and less massive than the Sun. It glows with an effective temperature of 4,312 K. It is around 6.9 billion years old, significantly older than the Sun. Gliese 69 is also known by its designations HD 10436 and LHS 1291.

Planetary System

In 2019 one candidate planet been detected by the radial velocity method.

The Gliese 69 planetary system
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

^ van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
^ 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 "Compilation of Eggen's UBV data, transformed to UBV (unpublished)".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. arXiv:1302.1905. Bibcode:2013A&A...552A..64S. doi:10.1051/0004-6361/201220927. S2CID 56094559.
^ 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. arXiv:astro-ph/0607235. Bibcode:2007ApJS..168..297T. doi:10.1086/509763. S2CID 18775378.
^ Pace, G. (March 2013). "Chromospheric activity as age indicator. An L-shaped chromospheric-activity versus age diagram". Astronomy & Astrophysics. 551: 4. arXiv:1301.5651. Bibcode:2013A&A...551L...8P. doi:10.1051/0004-6361/201220364. S2CID 56420519. L8.
^ "HD 10436". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 22 September 2017.
Barnes, J. R.; et al. (2019-06-11). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644v1. Bibcode:2019arXiv190604644T. {{cite journal}}: Cite journal requires |journal= (help)

Company, Sol. "Research: K stars within 100 light-years". Archived from the original on 24 December 2017. Retrieved 24 July 2011. {{cite web}}: |last= has generic name (help)

Constellation of Cassiopeia

Stars

Bayer	α (Schedar) β (Caph) γ (Navi/Tsih) δ (Ruchbah) ε (Segin) ζ (Fulu) η (Achird) θ (Marfak) ι κ λ μ ν ξ ο π ρ σ τ υ υ (Castula) φ χ ψ ω
Flamsteed	1 2 4 6 9 10 12 42 47 48 (A) 49 50 54
Variable	R S TZ WZ YZ (21) AO AR PZ V373 V509 V547 V669 V705 V762 V863 V773 V987 V1022 V1405
HR	5 91 144 196 244 273 297 743 932 8832 8853 8881
HD	861 7924 7977 15558 17156 (Nushagak) 240210 240237 240429 240430
Other	BD+60°2522 Gliese 49 IRAS 23304+6147 LS I +61 303 PSR J0205+6449 Tycho G 4U 0142+61 WR 2 WR 3

Exoplanets	HD 7924 b HD 17156 b HD 219134 b c d e (h) f g HD 240210 b HD 240237 b

Star clusters	Messier 52 Messier 103 NGC 103 NGC 110 NGC 129 NGC 133 NGC 136 NGC 146 NGC 189 NGC 225 NGC 358 NGC 366 NGC 381 NGC 433 NGC 436 NGC 457 NGC 559 NGC 637 NGC 654 NGC 659 NGC 663 NGC 1027 NGC 7789 NGC 7790 Trumpler 3

Nebulae

NGC	281 7635
Other	3C 58 Cassiopeia A Heart Nebula IC 289 IC 1805 KjPn 8 LBN 114.55+00.22 Sh 2-185 Westerhout 5

Galaxies

NGC	147 185 278
Other	Andromeda VII 3C 20 3C 35 Dwingeloo 1 Dwingeloo 2 MB 3 IC 10 Maffei 1 Maffei 2 QSO B0153+744

Astronomical events	SN 1181 SN 1572 (B)