HD 115337

Last updated
HD 115337
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Camelopardalis [1]
Right ascension 13h 12m 25.43269s [2]
Declination +80° 28′ 16.7089″ [2]
Apparent magnitude  (V)6.25 [3] (6.33 + 9.04) [4]
Characteristics
Spectral type G8 III + A8 V: [5]
B−V color index +0.94 [3]
Astrometry
Radial velocity (Rv)−9.38±0.21 [6] km/s
Proper motion (μ)RA: −6.288 mas/yr [2]
Dec.: +10.446 mas/yr [2]
Parallax (π)4.6717±0.0166  mas [2]
Distance 698 ± 2  ly
(214.1 ± 0.8  pc)
Absolute magnitude  (MV)−0.32 [1]
Details
A
Mass 3.4 [2]   M☉
Radius 16.4 [2]   R☉
Luminosity 161 [2]   L☉
Surface gravity (log g)2.38 [2]   cgs
Temperature 5,160 [2]   K
Metallicity [Fe/H]−0.13 [2]   dex
Rotational velocity (v sin i)<1 [7]  km/s
Age 270 [2]   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
SIMBAD data

HD 115337 is a binary star located in the northern circumpolar constellation Camelopardalis. The pair have a combined apparent magnitude of 6.25, [3] placing it near the limit for naked eye visibility. Parallax measurements place the system at a distance of 698 light years. [2] It has a heliocentric radial velocity of −9.4  km/s , [6] indicating that it is drifting towards the Solar System.

Optical measurements from Mason et al. (2001) find the pair to have a mean separation of an arcsecond along a position angle of 184°. [9] The components have spectral classifications of K0 Ib [10] and A8 V, [5] 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 , [11] giving a yellowish orange hue. HD 115337A is metal deficient, having an iron abundance only 74% of solar levels. Like most giants and supergiants, it spins slowly with a projected rotational velocity of less than 1  km/s . [7]

The physical characteristics of HD 115337A belong to a giant star as opposed to a supergiant. It has often been classified as G5 III [12] or G8 III, [5] more consistent with the above properties.

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
  4. ↑ Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (March 2002). "The Tycho double star catalogue". Astronomy & Astrophysics. 384 (1): 180–189. Bibcode:2002A&A...384..180F. doi: 10.1051/0004-6361:20011822 . ISSN   0004-6361.
  5. 1 2 3 Stephenson, C. B.; Sanwal, N. B. (June 1969). "The masses of stars above the main sequence". The Astronomical Journal. 74: 689. Bibcode:1969AJ.....74..689S. doi: 10.1086/110845 . ISSN   0004-6256.
  6. 1 2 Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi: 10.1051/0004-6361:20041272 . S2CID   17804304.
  7. 1 2 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . eISSN   1432-0746. ISSN   0004-6361.
  8. ↑ "HR 5009". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved August 14, 2022.
  9. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . ISSN   0004-6256.
  10. ↑ Cowley, A. P.; Bidelman, W. P. (February 1979). "MK spectral types for some F and G stars". Publications of the Astronomical Society of the Pacific. 91: 83. Bibcode:1979PASP...91...83C. doi: 10.1086/130446 . eISSN   1538-3873. ISSN   0004-6280.
  11. ↑ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . eISSN   1538-3881.
  12. ↑ Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi: 10.1086/143628 . eISSN   1538-4357. ISSN   0004-637X.

See also

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