60 Andromedae

60 Andromedae

Template:Location mark Location of 60 Andromedae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	+4.82
Characteristics
Spectral type	K3.5 III Ba0.4
U−B Template:Engvar	+1.74
B−V Template:Engvar	+1.48
Astrometry
Radial velocity (Rv)	–46.3 km/s
Proper motion (μ)	RA: –20.90 mas/yr Dec.: –14.46 mas/yr
Parallax (π)	5.2634±0.2576 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−1.19
Orbit
Period (P)	Template:Val days
Semi-major axis (a)	Template:Val mas
Eccentricity (e)	0.80
Inclination (i)	Template:Val°
Longitude of the node (Ω)	Template:Val°
Periastron epoch (T)	Template:Val HJD
Argument of periastron (ω) (secondary)	Template:Val°
Semi-amplitude (K1) (primary)	4.88 km/s
Details
60 And A
Mass	Template:Val Template:Solar mass
Luminosity	685 Template:Solar luminosity
Surface gravity (log g)	1.70±0.44 cgs
Temperature	4,054±42 K
Metallicity [Fe/H]	−0.13±0.12 dex
Age	2.02 Gyr
60 And B
Mass	Template:Val Template:Solar mass
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

60 Andromedae is a star system in the northern constellation of Andromeda, located to the east-northeast of Gamma Andromedae. 60 Andromedae is the Flamsteed designation (abbreviated 60 And), though the star also bears the Bayer designation b Andromedae. It is bright enough to be seen by the naked eye on a dark night, having an apparent visual magnitude of 4.82. Based upon parallax measurements, it is located at a distance of approximately Template:Convert from Earth. The system is drifting closer with a heliocentric radial velocity of –46 km/s.

This system is known to have three components. The primary is an aging giant star with a stellar classification of K3.5 III Ba0.4, meaning that an overabundance of singly-ionized barium (Ba⁺ ion) is observed in the spectrum of the star, making it a barium star. This star is about 2 billion years old with double the mass of the Sun. It is radiating 685 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,054 K. The secondary component is likely a degenerate white dwarf with an orbital period of 748.2 days and an eccentricity of 0.34. There is a third component at an angular separation of 0.22 arcseconds.

External links

1. Template:Cite simbad