42 Camelopardalis

42 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 06h 50m 57.08877s[1]
Declination +67° 34′ 18.9814″[1]
Apparent magnitude (V) 5.14[2]
Characteristics
Spectral type B4 IV[3] or B5 V[2]
B−V color index −0.152±0.002[2]
Astrometry
Radial velocity (Rv)3.2±1.2[4] km/s
Proper motion (μ) RA: +0.55[5] mas/yr
Dec.: +5.02[5] mas/yr
Parallax (π)4.2456 ± 0.2405 mas[1]
Distance770 ± 40 ly
(240 ± 10 pc)
Absolute magnitude (MV)−2.10[2]
Details
Mass6.5±0.2[6] M☉
Radius5.6[7] R☉
Luminosity (bolometric)2,460[8] L☉
Temperature16,550[8] K
Rotational velocity (v sin i)105[9] km/s
Age50.1±11.7[6] Myr
Other designations
42 Cam, BD+67°454, FK5 2523, GC 8902, HD 48879, HIP 32864, HR 2490, SAO 13973[10]
Database references
SIMBADdata

42 Camelopardalis is a single[11] star in the constellation Camelopardalis,[10] located roughly 770 light years away from the Sun.[1] It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.14.[2] The visual magnitude of the star is diminished by an extinction of 0.22 due to interstellar dust.[12] It is moving further from the Earth with a heliocentric radial velocity of 3 km/s.[4] 42 Camelopardalis has a peculiar velocity of 24.4+1.9
−2.1 km/s and may be a runaway star.[6]

Observations made in 1933 appeared to suggest this could be a Beta Cephei variable,[13] but this was not confirmed by follow-up measurements.[14] The star has a stellar classification of B4 IV,[3] matching a B-type subgiant star. It has 6.5[6] times the mass of the Sun and about 5.6[7] times the Sun's radius. 42 Camelopardalis is 50[6] million years old with a high rotation rate, showing a projected rotational velocity of 105 km/s.[9] It is radiating 2,460[8] times the luminosity of the Sun from its photosphere at an effective temperature of 16,550 K.[8] This star is notable as demonstrating similarities between the short-period B-type variables and the Cepheid variables.[citation needed]

  1. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Lesh1968 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Strom2005 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Edwards1933 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Heard1949 was invoked but never defined (see the help page).