4 Andromedae

4 Andromedae
	Template:Location mark; Location of 4 Andromedae (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	5.308
Characteristics
Evolutionary stage	Giant star
Spectral type	K5 III
B−V Template:Engvar	1.436
Astrometry
Radial velocity (Rv)	Script error: No such module "val". km/s
Proper motion (μ)	RA: −12.734 mas/yr ; Dec.: −30.026 mas/yr
Parallax (π)	9.155±0.0779 mas
Distance	Template:Rnd ± Template:Rnd ly ; (Template:Rnd ± Template:Rnd pc)
Details
Mass	Script error: No such module "val". Template:Solar mass
Radius	Script error: No such module "val". Template:Solar radius
Luminosity	170 Template:Solar luminosity
Surface gravity (log g)	1.91 cgs
Temperature	Script error: No such module "val". K
Metallicity [Fe/H]	Script error: No such module "val". dex
Age	Script error: No such module "val". Gyr
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
	Template:Odlist
Database references
SIMBAD	data

Template:Short description Script error: No such module "Distinguish".

Script error: No such module "Check for unknown parameters".

4 Andromedae, abbreviated 4 And, is a single^[8] star in the northern constellation of Andromeda. 4 Andromedae is the Flamsteed designation. It is dimly visible to the naked eye with an apparent visual magnitude of 5.308.^[2] Based upon an annual parallax shift of Script error: No such module "val".^[1] as seen from Earth's orbit, it is located 356 light years away. At this distance, interstellar extinction diminishes the apparent magnitude of 4 And by 0.5326 magnitudes.^[1] The star is moving closer with a heliocentric radial velocity of −11 km/s.^[9] It has a magnitude 11.7 visual companion at an angular separation of Script error: No such module "val". along a position angle of 348°, as of 2002.^[10]

At the age of 2.2^[4] billion years, this is an aging giant star with a stellar classification of K5 III,^[3] having consumed the hydrogen at its core and evolved away from the main sequence. It has 1.6^[4] times the mass of the Sun and has expanded to 23^[5] times the Sun's radius. The star is radiating 170^[6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,275 K.^[4]

References

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Observation data Epoch J2000 Equinox J2000
Template:Location mark Location of 4 Andromedae (circled)
Constellation	Andromeda
Right ascension	Template:RA^[1]
Declination	Template:DEC^[1]
Apparent magnitude (V)	5.308^[2]
Characteristics
Evolutionary stage	Giant star
Spectral type	K5 III^[3]
B−V Template:Engvar	1.436^[2]
Astrometry

Radial velocity (R_v)	Script error: No such module "val".^[1] km/s
Proper motion (μ)	RA: −12.734 mas/yr^[1] Dec.: −30.026 mas/yr^[1]
Parallax (π)	9.155±0.0779 mas^[1]
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)^[1]

Details

Mass	Script error: No such module "val".^[4] Template:Solar mass
Radius	Script error: No such module "val".^[5] Template:Solar radius
Luminosity	170^[6] Template:Solar luminosity
Surface gravity (log g)	1.91^[2] cgs
Temperature	Script error: No such module "val".^[4] K
Metallicity [Fe/H]	Script error: No such module "val".^[4] dex
Age	Script error: No such module "val".^[4] Gyr

Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist^[7]
Database references
SIMBAD	data