HD 40873

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HD 40873
Auriga constellation map.svg
Red circle.svg

Location of HD 40873 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 04m 29.10628s[1]
Declination +51° 34′ 24.2203″
Apparent magnitude (V) 6.45[2]
Characteristics
Spectral type A7 V[3]
U−B color index +0.16[2]
B−V color index +0.18[2]
Astrometry
Radial velocity (Rv) 19.6±2[4] km/s
Proper motion (μ) RA: 0.48±0.67[1] mas/yr
Dec.: −42.83±0.39[1] mas/yr
Parallax (π) 7.41 ± 0.66[1] mas
Distance 440 ± 40 ly
(130 ± 10 pc)
Details
Luminosity 38[5] L
Temperature 7,753[5] K
Rotational velocity (v sin i) 134[6] km/s
Other designations
35 Camelopardalis, BD+51°1146, FK5 2463, HD 40873, HIP 28765, HR 2123, NSV 2804, SAO 25548
Database references
SIMBAD data

HD 40873 is a star in the northern constellation of Auriga. Located around 440 light-years distant, it shines with a luminosity approximately 38 times that of the Sun and has a surface temperature of 7,753 K.[5] It is a suspected variable star.[2]

Samuel Molyneux named this star Telescopica in Auriga. [7] Flamsteed catalogued it as 35 Camelopardali Heveliana, which is the name James Bradley continued to use, although it is within the borders of the modern constellation Auriga.[8] Francis Baily reclassified it to Auriga as star 1924 in the British Association's 1845 Catalogue of 8377 Stars.[9]

Components[edit]

HD 40873 has a 9th magnitude class A5 companion about half an arc-minute away. The companion is itself a pair of stars, each of similar brightness, separated by 0.6".[10]

Names Right ascension Declination Apparent magnitude (V) Spectral type Database
ADS 4633 B
CCDM J06045+5135BC
06h 04m 30.061s +51° 35′ 02.63″ 9.5 A5 Simbad

References[edit]

  1. ^ a b c d van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 
  2. ^ a b c d Danziger, I. J.; Dickens, R. J. (July 1967), "Spectrophotometry of New Short-Period Variable Stars", Astrophysical Journal, 149: 55, Bibcode:1967ApJ...149...55D, doi:10.1086/149231 
  3. ^ Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement v.99. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. 
  4. ^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick, eds., "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, 30, p. 57, Bibcode:1967IAUS...30...57E 
  5. ^ a b c McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037Freely accessible, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x 
  6. ^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393 (3): 897–911, arXiv:astro-ph/0205255Freely accessible, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943 
  7. ^ Bradley, James; Rigaud, Stephen Peter (1832). Miscellaneous works and correspondence of the Rev. James Bradley, D.D., F.R.S. Oxford: University Press. p. 212.
  8. ^ Wagman, M. (1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18: 209. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305. 
  9. ^ British Association for the Advancement of Science; Francis Baily (1845). The Catalogue of Stars of the British Association for the Advancement of Science: Containing the Mean Right Ascensions and North Polar Distances of Eight Thousand Three Hundred and Seventy-seven Fixed Stars, Reduced to January 1, 1850: Together with Their Annual Precessions, Secular Variations and Proper Motions, as Well as the Logarithmic Constants for Computing Precession, Aberration and Nutation. With a Preface Explanatory of Their Construction and Application. R. and J. E. Taylor. pp. 2–. 
  10. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.