Gamma Persei

γ Persei

Location of γ Persei (circled)
Observation data J2000.0
Constellation	Perseus
Right ascension	03h 04m 47.79074s[1]
Declination	+53° 30′ 23.1687″[1]
Apparent magnitude (V)	2.93[2]
Characteristics
Spectral type	G8III + A2V[3]
U−B color index	+0.45[2]
B−V color index	+0.70[2]
Variable type	EA[4]
Distance		243 ± 9 ly (75 ± 3 pc)
Absolute magnitude (MV)	–1.50[6] (–1.23/0.01)[7]
Argument of periastron (ω) (secondary)		170.0°
Details
γ Per A
Rotational velocity (v sin i)	50.0[6] km/s
γ Per B
Mass	1.65[7] M☉
Temperature	7,895[7] K
HIP 14328, HR 915, IDS 02576+5307 AP, PPM 28201, SAO 23789, WDS  J03048+5330Aa,Ab.
Database references
SIMBAD	data

Gamma Persei (Gamma Per, γ Persei, γ Per) is a

This is a wide

Mass estimates for the two stars remain disparate. Using speckle interferometry, McAlister (1982) obtained mass estimates of 4.73 M_☉ for the primary and 2.75 M_☉ for the secondary, where M_☉ is the mass of the Sun. He noted that the mass estimate was too high for the given classification of the primary.^[14] Martin and Mignard (1998) determined masses for both components based on data from the Hipparcos mission: 5.036 ± 0.951 M_☉ for the primary and 2.295 ± 0.453 M_☉ for the secondary. They admit that the high inclination of the orbit resulted in a large margin of error.^[15] Prieto and Lambert (1999) came up with a mass estimate of 3.81 M_☉ for the primary,^[16] while Pizzolato and Maggio (2000) obtained 4.34 M_☉.^[6] Ling et al. (2001) obtained estimates of 2.7 M_☉ for the primary and 1.65 M_☉ for the secondary,^[7] while Kaler (2001) obtained 2.5 and 1.9, respectively.^[11]

Name and etymology

• This star, together with δ Per, ψ Per, σ Per, α Per and η Per, has been called the Segment of Perseus.^[17]
• In
  Chinese name for γ Persei itself is 天船二 (Tiān Chuán èr, English: the Second Star of Celestial Boat.)^[18]