HD 115004

HD 115004
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 13m 42.94245s[1]
Declination +40° 09′ 10.3802″[1]
Apparent magnitude (V) 4.94[2]
Characteristics
Spectral type G8.5 III CN0.5[3]
B−V color index 1.061±0.002[2]
Astrometry
Radial velocity (Rv)−22.10±0.14[2] km/s
Proper motion (μ) RA: −51.21[1] mas/yr
Dec.: +14.75[1] mas/yr
Parallax (π)7.10 ± 0.24 mas[1]
Distance460 ± 20 ly
(141 ± 5 pc)
Absolute magnitude (MV)−0.80[2]
Details[4]
Mass3.17±0.26 M☉
Radius22.89±0.85 R☉
Luminosity241.7±17.3 L☉
Surface gravity (log g)2.23±0.05 cgs
Temperature4,761±24 K
Metallicity [Fe/H]−0.10±0.10 dex
Rotational velocity (v sin i)5.8[5] km/s
Age440±130 Myr
Other designations
BD+40° 2633, HD 115004, HIP 64540, HR 4997, SAO 44519[6]
Database references
SIMBADdata

HD 115004 is a single[7] star in the northern constellation of Canes Venatici. It is faintly visible to the naked eye with an apparent visual magnitude of 4.94.[2] Based upon an annual parallax shift of 7.10±0.24 mas,[1] it is located around 460 light years from the Sun. The star is moving closer with a heliocentric radial velocity of −22 km/s.[2] HD 115004 will make its closest approach in about 1.7 million years at a separation of around 390 ly (119.45 pc).[2]

This is an evolved giant star, most likely (97% chance) on the horizontal branch,[4] with a stellar classification of G8.5 III CN0.5.[3] The suffix notation indicates a mild overabundance of the CN molecule in the stellar atmosphere. It has an estimated 3.2 times the mass of the Sun and, at the age of 440 million years, has expanded to 23 times the Sun's radius. The star is radiating around 242 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,761 K.[4]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference reffert2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference DeMedeiros2000 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).