Tau5 Serpentis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
For other stars with this Bayer designation, see Tau Serpentis.
τ5 Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 36m 29.2391s[1]
Declination +16° 07′ 08.705″[1]
Apparent magnitude (V) 5.938[1]
Characteristics
Spectral type F3V[1]
U−B color index +0.04[2]
B−V color index +0.29[2]
Astrometry
Radial velocity (Rv) −2 ± 5[1] km/s
Proper motion (μ) RA: 71.54[1] mas/yr
Dec.: −5.54[1] mas/yr
Parallax (π) 20.40 ± 0.81[1] mas
Distance 160 ± 6 ly
(49 ± 2 pc)
Absolute magnitude (MV) 2.49[3]
Details
Mass 1.52
(1.47 to 1.58)[4] M
Temperature 6900[4] K
Metallicity [Fe/H] = −0.20[4]
Age (1.6 ± 0.1) × 109  [4] years
Other designations
τ5 Ser, Tau5 Serpentis, Tau5 Ser, 18 Serpentis, 18 Ser, BD+16 2807, GC 20985, HD 139225, HIP 76424, HR 5804, PPM 131544, SAO 101642.[1]
Database references
SIMBAD data

Tau5 Serpentis (Tau5 Ser, τ5 Serpentis, τ5 Ser) is a F-type main sequence star in the constellation of Serpens, approximately 160 light-years from Earth.[1] It has an apparent visual magnitude of approximately 5.938.[1]

References[edit]

  1. ^ a b c d e f g h i j k * 18 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
  2. ^ a b HR 5804, 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. ^ From apparent magnitude and parallax.
  4. ^ a b c d HD 139225, database entry, Geneva-Copenhagen Survey of the Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line November 19, 2008.