Sigma Serpentis

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σ Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Serpens
Right ascension 16h 22m 04.4s
Declination +01° 01′ 45″
Apparent magnitude (V) +4.82[1]
Spectral type F0 V[1]
Distance 89.2 ± 2.5 ly
(27.4 ± 0.8 pc)
Absolute magnitude (MV) 2.63[2]
Surface gravity (log g) 4.05[2] cgs
Temperature 7,000[2] K
Rotational velocity (v sin i) 77.7[2] km/s
Other designations
50 Serpentis, BD+01° 3215, HD 147449, HIP 80179, HR 6093, SAO 121540.
Database references

Sigma Serpentis (σ Ser, σ Serpentis) is a star in the constellation Serpens.

Sigma Serpentis is a yellow-white F-type main sequence dwarf with an apparent magnitude of +4.82. It is approximately 89.2 light years from Earth. This star has 1.6 times the mass of the Sun with 1.4 times the Sun's radius. It is shining with 4.4 times the luminosity of the Sun, with the radiation being emitted from an outer atmosphere at an effective temperature of 7,110 K.[1]


  1. ^ a b c Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M 
  2. ^ a b c d Paunzen, E.; et al. (July 2014), "Investigating the possible connection between λ Bootis stars and intermediate Population II type stars", Astronomy & Astrophysics, 567: 8, arXiv:1406.3936Freely accessible, Bibcode:2014A&A...567A..67P, doi:10.1051/0004-6361/201423817, A67.