Epsilon Cephei

Epsilon Cephei

A visual band light curve for Epsilon Cephei, adapted from Bruntt et al. (2007)[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cepheus
Right ascension 22h 15m 02.19530s[2]
Declination +57° 02′ 36.8771″[2]
Apparent magnitude (V) 4.15 - 4.21[3]
Characteristics
Spectral type F0 V (Sr II)[4] or F0 IV[5]
U−B color index +0.073[6]
B−V color index +0.277[6]
Variable type δ Sct[3]
Astrometry
Radial velocity (Rv)−4.7±0.8[7] km/s
Proper motion (μ) RA: +481.53[2] mas/yr
Dec.: +46.04[2] mas/yr
Parallax (π)38.17 ± 0.97 mas[2]
Distance85 ± 2 ly
(26.2 ± 0.7 pc)
Absolute magnitude (MV)+2.13[8]
Details
ε Cep Aa
Mass1.64[9] M☉
Radius1.86[10] R☉
Luminosity11.65[8] L☉
Surface gravity (log g)4.11±0.14[9] cgs
Temperature7,514±255[9] K
Metallicity [Fe/H]+0.08[8] dex
Rotational velocity (v sin i)91[11] km/s
Age1.097[9] Gyr
ε Cep Ab
Mass0.57[12] M☉
Other designations
ε Cephei, 23 Cephei, BD+56 2741, HD 211336, HIP 109857, HR 8494, SAO 34227[13]
Database references
SIMBADdata

Epsilon Cephei, Latinized from ε Cephei, is a star in the northern constellation of Cepheus. Based upon an annual parallax shift of 38.17 mas as seen from the Earth,[2] it is located about 85 light years from the Sun. The star is visible to the naked eye with an apparent visual magnitude of 4.18.[6]

  1. ^ Cite error: The named reference Bruntt was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference AAVSOeps was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gray2001 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Mawet2011 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Breger1968 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Rhee2007 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Royer2007 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference DeRosa2014 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).