29 Camelopardalis

29 Camelopardalis (29 Cam) is a double star in the circumpolar constellation Camelopardalis. With an apparent magnitude of 6.59,^[2] it is right below the max visibility to the naked eye, and can only be viewed under phenomenal conditions. The star is located 484 light years^[1] away based on parallax, but is drifting further away with a radial velocity of 3.9 km/s.^[3]

29 Camelopardalis

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Camelopardalis
Right ascension	05h 50m 33.8729s[1]
Declination	+56° 55′ 08.1822″[1]
Apparent magnitude (V)	6.590±0.009[2]
Characteristics
29 Cam A
Spectral type	A4 IV-V
U−B color index	+0.13[2]
B−V color index	+0.09[2]
29 Cam B
Spectral type	A3 V
Astrometry
29 Cam A
Radial velocity (Rv)	3.9±2[3] km/s
Proper motion (μ)	RA: –19.460[1] mas/yr Dec.: –4.249[1] mas/yr
Parallax (π)	6.7370±0.0607 mas[1]
Distance	484 ± 4 ly (148 ± 1 pc)
Absolute magnitude (MV)	+0.71[4]
29 Cam B
Proper motion (μ)	RA: +2.585[5] mas/yr Dec.: –0.570[5] mas/yr
Parallax (π)	1.6375±0.0483 mas[5]
Distance	1,990 ± 60 ly (610 ± 20 pc)
Details
29 Cam A
Mass	2.47 ± 0.08[6] M☉
Radius	3.49+0.14 −0.12[7] R☉
Luminosity	58.9+8.9 −7.6[6] L☉
Surface gravity (log g)	3.77[8] cgs
Temperature	8,337 ± 96[6] K
Rotational velocity (v sin i)	123[9] km/s
Age	380 ± 14[6] Myr
29 Cam B
Mass	2.12[10] M☉
Radius	2.06[11] R☉
Luminosity	15.043[11] L☉
Temperature	7911[11] K
Rotational velocity (v sin i)	110±8[12] km/s
Other designations
BD+56° 1065, HD 38618, HIP 27592, HR 1992, SAO 25403, WDS J05506+5655A
Database references
SIMBAD	data

29 Cam A

29 Cam A has a classification of A4IV-V, which suggests that this star is beginning to evolve off the main sequence. Zorec et al. models it as a star that has completed 90.6% of the main sequence, which correlates to an age of 380 million years.^[6] 29 Cam now has 2.47 the mass of the Sun,^[6] and 3.49 times its radius. ^[7] It radiates at 58.9 times the luminosity of the Sun from an effective temperature of 8,337 K,^[6] which gives it a white hue of an A-type star. 29 Cam spins rapidly at a projected rotational velocity of 123 km/s despite its evolved state.

29 Cam B

29 Cam has a companion designated BD+56 1065B, which is a 10 magnitude star. According to the proper motion, this star is unrelated to the primary, and is four times further than the primary.^[13] The companion is relatively cooler and less luminous than the primary.