# 10 Andromedae

10 Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension  23h 19m 52.42304s[1]
Declination +42° 04′ 41.0734″[1]
5.81[2]
Characteristics
Spectral type M0 III[3][2]
B−V color index 1.512±0.007[2]
Astrometry
Proper motion (μ) RA: +42.417[1] mas/yr
Dec.: +4.900[1] mas/yr
Parallax (π)6.6282 ± 0.0851[1] mas
Distance492 ± 6 ly
(151 ± 2 pc)
Details
Luminosity258.78[2] L
Other designations
10 And, BD+41° 4752, FK5 3870, HD 219981, HIP 115191, HR 8876, SAO 52914, PPM 64085[6]
Database references

10 Andromedae, abbreviated 10 And, is an astrometric binary[3] star system in the northern constellation of Andromeda. 10 Andromedae is the Flamsteed designation. It has an apparent visual magnitude of approximately 5.81,[2] which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 6.6 mas,[1] it is located 492 light years away. The system is moving toward the Earth with a heliocentric radial velocity of −1.1 km/s.[4]

The visible component is an aging red giant star with a stellar classification of M0 III,[2] which indicates it has consumed the hydrogen at its core and evolved off the main sequence. The measured angular diameter of this star, after correction for limb darkening, is 2.01±0.02 mas.[7] At the estimated distance of 10 And, this yields a physical size of about 33 times the radius of the Sun.[5] It is radiating 259[2] times the Sun's luminosity from its enlarged photosphere.

## References[]

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
2. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
3. ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
4. ^ a b Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
5. ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(151\cdot 2.01\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 65.3\cdot R_{\bigodot }\end{aligned}}}
6. ^ "10 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 17, 2018.
7. ^ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039