HD 10550

HD 10550
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 42m 43.51077s[1]
Declination –03° 41′ 24.7210″[1]
Apparent magnitude (V) 4.98[2]
Characteristics
Spectral type K2/3 III CN II[3]
B−V color index 1.378±0.003[2]
Astrometry
Radial velocity (Rv)−33.28±0.15[1] km/s
Proper motion (μ) RA: −8.989[1] mas/yr
Dec.: −33.238[1] mas/yr
Parallax (π)2.9564 ± 0.1730 mas[1]
Distance1,100 ± 60 ly
(340 ± 20 pc)
Absolute magnitude (MV)−2.82[2]
Details
Radius77[4] R☉
Luminosity2,537.45[2] L☉
Surface gravity (log g)1.83[5] cgs
Temperature4,110[5] K
Metallicity [Fe/H]−0.12[5] dex
Rotational velocity (v sin i)10[6] km/s
Other designations
BD−04° 260, FK5 1049, HD 10550, HIP 7999, HR 500, SAO 129465[7]
Database references
SIMBADdata

HD 10550 is a single[8] star in the equatorial constellation of Cetus. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.98.[2] Based upon an annual parallax shift of 2.9564 mas,[1] it is located around 1,100 light years from the Sun. The star is moving closer with a heliocentric radial velocity of −33 km/s.[1] It has a high peculiar velocity of 72.7+5.7
−4.3 km/s and may be a runaway star.[9]

The stellar classification of this star is K2/3 III CN II,[3] showing the spectrum of an evolved K-type giant star with an overabundance of CN in the atmosphere. The measured angular diameter of this star, after correction for limb darkening, is 2.11±0.04 mas.[10] At the estimated distance of this star, this yields a physical size of about 77 times the radius of the Sun.[4] The star is radiating around 2,537[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,110 K.[5]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 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 Houk1999 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Soubiran2010 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Bernacca1970 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 Tetzlaff2011 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).