HD 115337

HD 115337
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 13h 12m 25.43269s[1]
Declination +80° 28′ 16.7089″[1]
Apparent magnitude (V) 6.25[2] (6.33 + 9.04)[3]
Characteristics
Spectral type G8 III + A8 V:[4]
B−V color index +0.94[2]
Astrometry
Radial velocity (Rv)−9.38±0.21[5] km/s
Proper motion (μ) RA: −6.288 mas/yr[1]
Dec.: +10.446 mas/yr[1]
Parallax (π)4.6717 ± 0.0166 mas[1]
Distance698 ± 2 ly
(214.1 ± 0.8 pc)
Absolute magnitude (MV)−0.32[6]
Details
A
Mass3.4[1] M☉
Radius16.4[1] R☉
Luminosity161[1] L☉
Surface gravity (log g)2.38[1] cgs
Temperature5,160[1] K
Metallicity [Fe/H]−0.13[1] dex
Rotational velocity (v sin i)<1[7] km/s
Age270[1] Myr
Other designations
AG+80°289, BD+81 416, FK5 3056, GC 17932, HD 115337, HIP 64437, HR 5009, SAO 2164, WDS J13124+8028A[8]
Database references
SIMBADdata

HD 115337 is a binary star located in the northern circumpolar constellation Camelopardalis. The pair have a combined apparent magnitude of 6.25,[2] placing it near the limit for naked eye visibility. Parallax measurements place the system at a distance of 698 light years.[1] It has a heliocentric radial velocity of −9.4 km/s,[5] indicating that it is drifting towards the Solar System.

The components have spectral classifications of K0 Ib[9] and A8 V,[4] indicating a K-type lower luminosity supergiant and an A-type main-sequence star (with uncertainty). At present the primary has 3.4 times the mass of the Sun and an enlarged radius of 16.4 R☉ due to its evolved status. It radiates 161 times the luminosity of the Sun from its photosphere at an effective temperature of 5,160 K,[10] giving a yellowish orange hue. HD 115337A is metal deficient, having an iron abundance only 74% of solar levels. Like most giants, it spins slowly with a projected rotational velocity of less than 1 km/s.[7]

Ironically, the characteristics of HD 115337A belong to a giant star as opposed to a supergiant. It has even been classified as G5 III[11] or G8 III,[4] more consistent with the above properties. Nevertheless, optical measurements from Mason et al. (2001) find the pair to have a mean separation of an arcsecond along a position angle of 184°.[12]

  1. ^ a b c d e f g h i j k l Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Haggkvist1970 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Fabricius2002 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Stephenson1969 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Cowley1979 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Adams1935 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Mason2001 was invoked but never defined (see the help page).