11 Camelopardalis

11 Camelopardalis

A light curve for BV Camelopardalis, plotted from Hipparcos data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 06m 08.45273s[2]
Declination +58° 58′ 20.5432″[2]
Apparent magnitude (V) 5.08[3]
Characteristics
Spectral type B3 Ve[4]
B−V color index −0.080[5]
Variable type Be[6]
Astrometry
Proper motion (μ) RA: −6.264[2] mas/yr
Dec.: −7.118[2] mas/yr
Parallax (π)4.7543 ± 0.1224 mas[2]
Distance690 ± 20 ly
(210 ± 5 pc)
Absolute magnitude (MV)−1.38[5]
Details
Mass6.0±1.2[7] M☉
Radius7.87[8] R☉
Luminosity1,766+131
−122[7] L☉
Surface gravity (log g)4.00±0.35[7] cgs
Temperature17,240±560[7] K
Rotational velocity (v sin i)95±6[7] km/s
Age25±3[9] Myr
Other designations
11 Cam, BV Cam, BD+58°804, GC 6193, HD 32343, HIP 23734, HR 1622, SAO 25001, CCDM 05062+5900, WDS J05061+5858A[10]
Database references
SIMBADdata
11 Camelopardalis and its reddish companion 12 Camelopardalis

11 Camelopardalis is a single[11] star in the northern circumpolar constellation of Camelopardalis, located around 690 light years away from the Sun as determined by parallax. It has the variable star designation BV Camelopardalis; 11 Camelopardalis is the Flamsteed designation. This object is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of +5.22.[5] It forms a double star with 12 Camelopardalis, which is only 3 arcminutes away.

This is a main sequence Be star with a stellar classification of B3 Ve.[4] Samus et al. (2017) classify it as a Be variable, rather than a Gamma Cassiopeiae type, and it ranges from a peak Hipparcos magnitude of 5.10 down to 5.22.[6] The star is spinning with a projected rotational velocity of 95 km/s,[7] but is being viewed from an extreme pole-on position. Hence it is spinning much more rapidly than indicated. Outbursts of hydrogen emission lines have been observed, as well as rapid changes in hydrogen line profiles.[12] It is 25[9] million years old with around six[7] times the mass of the Sun.

  1. ^ Cite error: The named reference HipDataAccess was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference vsx was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Slettebak1982 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  7. ^ a b c d e f g Cite error: The named reference Zorec2016 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference kervella2022 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Tetzlaff2011 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. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Ballereau1987 was invoked but never defined (see the help page).