10 Serpentis

10 Serpentis
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 15h 28m 38.23670s[1]
Declination +01° 50′ 31.4852″[1]
Apparent magnitude (V) 5.15[2]
Characteristics
Spectral type A6 III[3] or A7 IV[4]
B−V color index 0.245±0.005[2]
Astrometry
Radial velocity (Rv)−10.2±2.8[2] km/s
Proper motion (μ) RA: −85.35[1] mas/yr
Dec.: −34.31[1] mas/yr
Parallax (π)25.16 ± 0.31 mas[1]
Distance130 ± 2 ly
(39.7 ± 0.5 pc)
Absolute magnitude (MV)2.15[2]
Details
Mass1.64[5] M☉
Luminosity11.9±0.4[6] L☉
Surface gravity (log g)4.24±0.14[5] cgs
Temperature7,872±268[5] K
Rotational velocity (v sin i)110[6] km/s
Age424[5] Myr
Other designations
10 Ser, BD+02° 2965, FK5 3221, HD 137898, HIP 75761, HR 5746, SAO 121020[7]
Database references
SIMBADdata

10 Serpentis is a single,[8] white-hued star in Serpens Caput, the western section of the equatorial constellation of Serpens. It is faintly visible to the naked eye with an apparent visual magnitude of 5.15.[2] Located around 129 ly (39.7 pc) distant, it is moving closer to the Sun with a heliocentric radial velocity of −10 km/s and will make its closest approach in around 983,000 years at a separation of about 112 ly (34.2 pc).[2]

Abt and Morrell (1995) gave this star a stellar classification of A6 III,[3] matching an evolved red giant star that has used up its core hydrogen. In contrast, Houk and Swift (1999) classed it A7 IV,[4] which is more in line with an evolving subgiant star that is on its way to becoming a giant. It has a high rate of spin with a projected rotational velocity of 115 km/s, giving it an oblate shape with an equatorial bulge that is an estimated 7% larger than the polar radius.[9] The star is about 424 million years old with 1.64[5] times the mass of the Sun and is radiating 12[6] times the Sun's luminosity from its photosphere at an effective temperature of roughly 7,872 K.[5]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference vanBelle2012 was invoked but never defined (see the help page).