21 Camelopardalis

21 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 40m 28.99683s[1]
Declination +61° 56′ 56.0999″[1]
Apparent magnitude (V) 6.867[2]
Characteristics
Spectral type A5[3]
B−V color index +0.22[4]
Astrometry
Radial velocity (Rv)−15.5[5] km/s
Proper motion (μ) RA: −6.911[1] mas/yr
Dec.: +1.818[1] mas/yr
Parallax (π)5.0131 ± 0.0864 mas[1]
Distance650 ± 10 ly
(199 ± 3 pc)
Absolute magnitude (MV)0.90[6]
Details
Radius3.121[7] R☉
Luminosity35.66[6] L☉
Temperature7,619[7] K
Other designations
21 Cam, BD+61°806, FK5 1150, HD 37136, HIP 26700, SAO 13564[8]
Database references
SIMBADdata

21 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis, located around 650 light years away from the Sun.[1] It is a challenge to view with the naked eye even under excellent viewing conditions, having an apparent visual magnitude of 6.9.[2] This is one of the fainter stars with a Flamsteed designation, one of only 220 below the magnitude cutoff for the Bright Star Catalogue.[9] It is moving closer to the Earth with a heliocentric radial velocity of −15.5 km/s.[5]

The spectral type for 21 Camelopardalis is given only as A5 with no published luminosity class. It is treated as a normal main sequence star,[10] although it is calculated to be larger and more luminous than a typical A5 main sequence star.[7][11] Based upon changes to its proper motion over time, this is a probable astrometric binary.[12]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference uvby was invoked but never defined (see the help page).
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  4. ^ Cite error: The named reference pastel was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference rv was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference masana was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference bidelman was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference jordi was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference habets was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Frankowski2007 was invoked but never defined (see the help page).