Tau3 Serpentis

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τ3 Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 35m 33.2302s[1]
Declination +17° 39′ 19.999″[1]
Apparent magnitude (V) 6.108[1]
Spectral type G8III:[1]
B−V color index +0.94[2]
Radial velocity (Rv)−22.3 ± 2[1] km/s
Proper motion (μ) RA: −77.08[1] mas/yr
Dec.: −13.25[1] mas/yr
Parallax (π)7.87 ± 0.87[1] mas
Distanceapprox. 410 ly
(approx. 130 pc)
Absolute magnitude (MV)+0.78[3]
Luminosity57[3] L
Other designations
τ3 Ser, 15 Serpentis, BD+18° 3044, FK5 3230, GC 20962, HD 139074, HIP 76337, HR 5795, SAO 101631, PPM 131527[1]
Database references

Tau3 Serpentis, Latinized from τ3 Serpentis, is a G-type giant star in the constellation of Serpens. It is approximately 410 light-years from Earth.[1] It has an apparent visual magnitude of approximately 6.108.[1]


  1. ^ a b c d e f g h i j k * 15 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
  2. ^ HR 5795, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 19, 2008.
  3. ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971Freely accessible, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.