  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 36m 52.41522s [1] |
| Declination | +40° 10′ 56.5783″ [1] |
| Apparent magnitude (V) | 6.08 [2] |
| Characteristics | |
| Spectral type | G3 Ib [3] + B7 V? [4] |
| U−B color index | 0.69 [2] |
| B−V color index | 1.03 [2] |
| Astrometry | |
| Radial velocity (Rv) | −12.06±0.03 [4] km/s |
| Proper motion (μ) |
RA: −2.99±1.03
[5]
mas/
yr Dec.: −4.56±0.67 [5] mas/ yr |
| Parallax (π) | 1.9414 ± 0.0574 mas [1] |
| Distance | 1,680 ± 50
ly (520 ± 20 pc) |
| Absolute magnitude (MV) | −2.79 [6] |
| Orbit [4] | |
| Period (P) | 7829.3±1.4 days |
| Eccentricity (e) | 0.8867±0.0006 |
| Periastron epoch (T) | 54417.21±0.22 |
|
Argument of periastron (ω) (secondary) | 250.61±0.20° |
|
Semi-amplitude (K1) (primary) | 21.77±0.04 km/s |
| Details | |
| Radius | 45.78+2.89 −3.69 [1] R☉ |
| Luminosity | 1,094±43 [1] L☉ |
| Surface gravity (log g) | 1.78 [7] cgs |
| Temperature | 4,907+210 −149 [1] K |
| Metallicity [Fe/H] | +0.04 [7] dex |
| Rotational velocity (v sin i) | 6.2 [8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 1884 is a spectroscopic binary star in the constellation Auriga. The primary is a G type supergiant star while the secondary is probably a B type main sequence star. [4]
The possible spectroscopic binary nature of the star was first noted in 1983 by Gilbert Burki and Michel Mayor in a paper on the rate of binaries among supergiant stars. [9] In the same year, William P. Bidelman noted that the stellar spectrum was composite indicating a companion star. [10] Confirmation of spectroscopic binary status and a preliminary orbit was published in 1998 by R. Paul Butler, [11] a much more accurate orbit was published in 2015 by Roger Griffin. [4]
References
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Argue, A. N. (1966). "UBV photometry of 550 F, G and K type stars". Monthly Notices of the Royal Astronomical Society. 133 (4): 175–493. Bibcode: 1966MNRAS.133..475A. doi: 10.1093/mnras/133.4.475.
- ^ Bidelman, William P. (1957). "Spectral Classification of Stars Noted on Case Objective-Prism Plates. I". Publications of the Astronomical Society of the Pacific. 69 (407): 147–152. Bibcode: 1957PASP...69..147B. doi: 10.1086/127034.
- ^ a b c d e Griffin, R. F. (2015). "Spectroscopic binary orbits from photoelectric radial velocities. Paper 241: HR 1884, HD 174103, HD 182563, and HR 8442, with a note on zeta Cephei". The Observatory. 135: 71–95. Bibcode: 2015Obs...135...71G.
- ^ a b van Leeuwen, F. (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. S2CID 18759600. Vizier catalog entry
- ^ Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. (2010). "Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios". Monthly Notices of the Royal Astronomical Society. 408 (3): 1568. Bibcode: 2010MNRAS.408.1568K. doi: 10.1111/j.1365-2966.2010.17217.x.
- ^ a b Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode: 2014AJ....147..137L. doi: 10.1088/0004-6256/147/6/137.
- ^ De Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. Bibcode: 2002A&A...395...97D. doi: 10.1051/0004-6361:20021214.
- ^ Burki, G.; Mayor, M. (1983). "Nineteen new spectroscopic binaries and the rate of binary stars among F-M supergiants". Astronomy and Astrophysics. 124 (2): 256–266. Bibcode: 1983A&A...124..256B.
- ^ Bidelman, W. P. (1983). "Objective-prism discoveries in the northern sky. I". Astronomical Journal. 88: 1182–1186. Bibcode: 1983AJ.....88.1182B. doi: 10.1086/113408.
- ^ Butler, R. Paul (1998). "A Precision Velocity Study of Photometrically Stable Stars in the Cepheid Instability Strip". Astrophysical Journal. 494 (1): 342–365. Bibcode: 1998ApJ...494..342B. CiteSeerX 10.1.1.37.7095. doi: 10.1086/305195. S2CID 119678211.
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