HD 40873
 
| |
| 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 | |
| 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
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
- 1 2 3 4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752
, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 - 1 2 3 4 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
- ↑ 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.
- ↑ 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
- 1 2 3 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:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
- ↑ 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/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943
- ↑ 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.
- ↑ Wagman, M. (1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18: 209. Bibcode:1987JHA....18..209W.
- ↑ 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–.
- ↑ 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.
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