5 Camelopardalis

5 Camelopardalis
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 04h 55m 03.13350s[1]
Declination +55° 15′ 32.8530″[1]
Apparent magnitude (V) 5.522[2]
Characteristics
Spectral type B9.5 V[3] or B9.5 IV[4]
U−B color index +0.001[2]
B−V color index +0.038[2]
Astrometry
Radial velocity (Rv)+2.4[5] km/s
Proper motion (μ) RA: −15.304[1] mas/yr
Dec.: −11.501[1] mas/yr
Parallax (π)4.2348 ± 0.0951 mas[1]
Distance770 ± 20 ly
(236 ± 5 pc)
Absolute magnitude (MV)−0.84[6]
Details
Mass2.15[7] M☉
Radius5.1[7] R☉
Luminosity226[7] L☉
Surface gravity (log g)3.36[7] cgs
Temperature9,931[7] K
Rotational velocity (v sin i)102[8] km/s
Age277[9] Myr
Other designations
5 Cam, BD+55°941, FK5 2367, HD 30958, HIP 22854, HR 1555, SAO 24904, WDS J04551+5516A[10]
Database references
SIMBADdata

5 Camelopardalis is a binary star[11] system in the northern circumpolar constellation of Camelopardalis, located about 770 light years away from the Sun as determined using parallax.[1] With an apparent magnitude of 5.5,[2] it can be seen with the naked eye as a faint, blue-white hued star. The system is moving further from the Earth with a heliocentric radial velocity of +2.4 km/s.[5]

The primary component is a B-type main sequence star with a stellar classification of B9.5 V.[3] However, Abt and Morrell (1995) found a luminosity class of IV,[4] suggesting it is instead a subgiant star that is evolving off the main sequence. It has a high rate of spin with a projected rotational velocity of 102 km/s and has 2.15 times the mass of the Sun. The star is radiating 226 times the luminosity of the Sun from its photosphere at an effective temperature of 9,931 K.[7]

The magnitude 12.9 common proper motion companion lies at an angular separation of 12.9″.[11] It appears to be slightly smaller and cooler than the Sun.[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 c d Cite error: The named reference oaluhr was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aj74_375 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference tic was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference dr2b was invoked but never defined (see the help page).