Beta Serpentis

β Serpentis
Location of β Serpentis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 46m 11.25435s[1]
Declination +15° 25′ 18.5959″[1]
Apparent magnitude (V) +3.65[2] (3.68 + 9.7)[3]
Characteristics
Spectral type A2 V[4] or A2 IV[5] + K3 V[3]
U−B color index +0.09[2]
B−V color index +0.073[4]
Astrometry
Radial velocity (Rv)+0.6±0.3[6] km/s
Proper motion (μ) RA: +65.38[1] mas/yr
Dec.: −38.61[1] mas/yr
Parallax (π)21.03 ± 0.26 mas[1]
Distance155 ± 2 ly
(47.6 ± 0.6 pc)
Absolute magnitude (MV)+0.30/+6.59[7]
Details
Mass1.94[8] M☉
Surface gravity (log g)3.27[8] cgs
Temperature8,928±304[8] K
Rotational velocity (v sin i)207±10.4[4] km/s
Age267[8] Myr
Other designations
β Ser, 28 Serpentis, BD+15° 2911, HD 141003, HIP 77233, HR 5867, SAO 101725, ADS 9778, CCDM 15461+1525[9]
Database references
SIMBADdata

Beta Serpentis, Latinized from β Serpentis, is a binary star[3] system in the constellation Serpens, in its head (Serpens Caput). It is visible to the naked eye with a combined apparent visual magnitude of +3.65.[2] Based upon an annual parallax shift of 21.03 mas as seen from Earth,[1] it is located around 155 light years from the Sun. The system is a member of the Ursa Major Moving Group.[7]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Lutz1977 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Jones2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gray1987 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference King2003 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).