18 Camelopardalis

18 Camelopardalis is a yellow-white-hued star in the northern circumpolar constellation of Camelopardalis. It has an apparent visual magnitude is 6.44,^[2] which makes it a challenge to view with the naked eye. Using the measured annual parallax shift of 23.02 mas, its distance can be estimated at 142 light-years. The star is moving away from the Sun with a radial velocity of +33 km/s^[2] and has an annual proper motion of 0.251 arcseconds.^[9]

18 Camelopardalis

Observation data Epoch J2000      Equinox
Constellation	Camelopardalis
Right ascension	05h 32m 33.7997s[1]
Declination	+57° 13′ 15.855″[1]
Apparent magnitude (V)	6.44[2]
Characteristics
Spectral type	F8 V[3][2]
U−B color index	+0.11[4]
B−V color index	+0.587[2]
Astrometry
Radial velocity (Rv)	+33.264±0.0160[2] km/s
Proper motion (μ)	RA: +111.231[1] mas/yr Dec.: −224.686[1] mas/yr
Parallax (π)	23.0161±0.0633 mas[1]
Distance	141.7 ± 0.4 ly (43.4 ± 0.1 pc)
Absolute magnitude (MV)	3.234+0.076 −0.079[5]
Details[6]
Mass	1.201+0.015 −0.014 M☉
Radius	1.93+0.08 −0.04[1] R☉
Luminosity	4.242±0.015[1] L☉
Surface gravity (log g)	3.95±0.02 cgs
Temperature	5,908±38 K
Metallicity [Fe/H]	−0.02±0.04 dex
Rotational velocity (v sin i)	5[7] km/s
Age	5.28+0.25 −0.19 Gyr
Other designations
18 Cam, BD+57° 889, FK5 1150, HD 36066, HIP 25973, HR 1828, SAO 25241[8]
Database references
SIMBAD	data

The spectrum of this star matches a stellar classification of F8 V,^[2] indicating this is an ordinary F-type main-sequence star. It is around 5.3 billion years old and is spinning with a projected rotational velocity of 5 km/s.^[7] The star has 1.2 times the mass of the Sun,^[6] 1.93 times the Sun's radius,^[1] and has near solar abundances of elements.^[6] The star is radiating 4.24^[1] times the Sun's luminosity from its photosphere at an effective temperature of 5,908 K.^[6]