18 Camelopardalis

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]
Distance141.7 ± 0.4 ly
(43.4 ± 0.1 pc)
Absolute magnitude (MV)3.234+0.076
−0.079[5]
Details[6]
Mass1.201+0.015
−0.014 M☉
Radius1.93+0.08
−0.04[1] R☉
Luminosity4.242±0.015[1] L☉
Surface gravity (log g)3.95±0.02 cgs
Temperature5,908±38 K
Metallicity [Fe/H]−0.02±0.04 dex
Rotational velocity (v sin i)5[7] km/s
Age5.28+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
SIMBADdata

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]

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]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Soubiran2013 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Balachandran1990 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Soubiran2005 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Ramirez2013 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Bernacca1970 was invoked but never defined (see the help page).
  8. ^ "18 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-26.
  9. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).