HD 115337

Last updated
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]
Distance 698 ± 2  ly
(214.1 ± 0.8  pc)
Absolute magnitude  (MV)−0.32 [6]
Details
A
Mass 3.4 [1]   M☉
Radius 16.4 [1]   R☉
Luminosity 161 [1]   L☉
Surface gravity (log g)2.38 [1]   cgs
Temperature 5,160 [1]   K
Metallicity [Fe/H]−0.13 [1]   dex
Rotational velocity (v sin i)<1 [7]  km/s
Age 270 [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
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, [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]

Related Research Articles

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<span class="mw-page-title-main">HD 27245</span> Star in the constellation Camelopardalis

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HD 82514, also known as HR 3790, is a solitary, orange-hued star located in the southern constellation Antlia. It has an apparent magnitude of 5.86, allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, it is estimated to be 279 light years away from the Solar System. However, it is receding with a heliocentric radial velocity of 14.3 km/s.

HD 39901 is an orange hued star located in the constellation Columba. It is also called HR 2069, which is the star's Bright Star Catalog designation. Eggen (1989) lists it as a member of the old disk population.

<span class="mw-page-title-main">12 Pegasi</span> K-type supergiant star in the constellation of Pegasus

12 Pegasi is a K-type supergiant star in the constellation of Pegasus. It has a spectral type of K0Ib Hdel0.5, which indicates that it is a less luminous K-type supergiant with strong H-δ Balmer lines. The star has expanded to 81 times the radius of the Sun, and has an effective temperature of 4,185 K.

HD 39194 is a star located in the southern circumpolar constellation Mensa. It has an apparent magnitude of 8.07, making it readily visible in binoculars but not to the naked eye. The object is relatively close at a distance of 86 light years but is receding with a heliocentric radial velocity of 13.9 km/s.

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HD 200044 is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.7, allowing it to be faintly seen with the naked eye. The object is located 598 light years away, but is approaching the Solar System with a heliocentric radial velocity of −15.07 km/s.

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HD 58425, also known as HR 2830, is an astrometric binary located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orang point of light at an apparent magnitude of 5.64. Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth. It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s. HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue, but this was dropped after the official IAU's official constellation borders were drawn.

HD 34255, also known HR 1720, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.60, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of about 1.65 kly but is approaching the Solar System with a heliocentric radial velocity of −7.7 km/s.

HD 104555, also known as HR 4595, is a star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 6.02, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia Data Release 3, it is estimated to be 336 light years distant. It appears to be receding from the Solar System, having a heliocentric radial velocity of 17.1 km/s.

HD 31529, also known as HR 1584, is a solitary, orange hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 6.09, making it faintly visible to the naked eye if viewed under ideal conditions. This object is located relatively far at a distance of 932 light years based on parallax measurements from Gaia DR3, but is receding with a heliocentric radial velocity of 28.4 km/s. Eggen (1989) lists it as a member of the old disk population.

HD 32820, also known as HR 1651, is a yellowish-white hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 6.3, placing it near the limit of naked eye visibility. The object is located relatively close at a distance of 103 light years based on parallax measurements from Gaia DR3, but is receding with a heliocentric radial velocity of 29.8 km/s.

<span class="mw-page-title-main">HD 106248</span> Star in the constellation Chamaeleon

HD 106248, also known as HR 4649, is a solitary, orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3, the object is estimated to be 358 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 34.5 km/s. At its current distance, HD 106248's brightness is diminished by 0.32 due to interstellar dust and Eggen (1993) lists it as a member of the old (thick) disk population.

<span class="mw-page-title-main">HD 22764</span> Double star; Camelopardalis

HD 22764, also known as HR 1112, is an orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.78, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,770 light years based on Gaia DR3 parallax measurements but is approaching the Solar System with a heliocentric radial velocity of −12.5 km/s. At its current distance, HD 22764's brightness is diminished by 0.66 magnitudes due to interstellar dust.

References

  1. 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.
  2. 1 2 3 Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
  3. ↑ 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.
  4. 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.
  5. 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.
  6. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  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. ↑ 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.
  10. ↑ 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.
  11. ↑ 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.
  12. ↑ 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.

See also

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