HR 1884

HR 1884
	Location of HR 1884 (circled)
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Auriga
Right ascension	05h 36m 52.41522s
Declination	+40° 10′ 56.5783″
Apparent magnitude (V)	6.08
Characteristics
Spectral type	G3 Ib + B7 V?
U−B color index	0.69
B−V color index	1.03
Astrometry
Radial velocity (Rv)	−12.06±0.03 km/s
Proper motion (μ)	RA: −2.99±1.03 mas/yr ; Dec.: −4.56±0.67 mas/yr
Parallax (π)	1.9414 ± 0.0574 mas
Distance	1,680 ± 50 ly ; (520 ± 20 pc)
Absolute magnitude (MV)	−2.79
Orbit
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 R☉
Luminosity	1,094±43 L☉
Surface gravity (log g)	1.78 cgs
Temperature	4,907+210; −149 K
Metallicity [Fe/H]	+0.04 dex
Rotational velocity (v sin i)	6.2 km/s
Other designations
Database references
SIMBAD	data

Short description: Binary star system in the constellation Auriga

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

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
↑ ^2.0 ^2.1 ^2.2 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. doi:10.1093/mnras/133.4.475. Bibcode: 1966MNRAS.133..475A.
↑ 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. doi:10.1086/127034. Bibcode: 1957PASP...69..147B.
↑ ^4.0 ^4.1 ^4.2 ^4.3 ^4.4 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.
↑ ^5.0 ^5.1 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. 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. doi:10.1111/j.1365-2966.2010.17217.x. Bibcode: 2010MNRAS.408.1568K.
↑ ^7.0 ^7.1 Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. doi:10.1088/0004-6256/147/6/137. Bibcode: 2014AJ....147..137L.
↑ 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. doi:10.1051/0004-6361:20021214. Bibcode: 2002A&A...395...97D.
↑ 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. doi:10.1086/113408. Bibcode: 1983AJ.....88.1182B.
↑ Butler, R. Paul (1998). "A Precision Velocity Study of Photometrically Stable Stars in the Cepheid Instability Strip". Astrophysical Journal 494 (1): 342–365. doi:10.1086/305195. Bibcode: 1998ApJ...494..342B.

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Original source: https://en.wikipedia.org/wiki/HR 1884. Read more

[GaiaDR2-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.

[Argue1966-2] 2.0 ^2.1 ^2.2 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. doi:10.1093/mnras/133.4.475. Bibcode: 1966MNRAS.133..475A.

[Bidelman1957-3] 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. doi:10.1086/127034. Bibcode: 1957PASP...69..147B.

[Griffin2015-4] 4.0 ^4.1 ^4.2 ^4.3 ^4.4 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.

[van_Leeuwen2007-5] 5.0 ^5.1 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry

[kovtyukh-6] 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. doi:10.1111/j.1365-2966.2010.17217.x. Bibcode: 2010MNRAS.408.1568K.

[luck-7] 7.0 ^7.1 Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. doi:10.1088/0004-6256/147/6/137. Bibcode: 2014AJ....147..137L.

[vsini-8] 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. doi:10.1051/0004-6361:20021214. Bibcode: 2002A&A...395...97D.

[Burki1983-9] 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.

[Bidelman1983-10] Bidelman, W. P. (1983). "Objective-prism discoveries in the northern sky. I". Astronomical Journal 88: 1182–1186. doi:10.1086/113408. Bibcode: 1983AJ.....88.1182B.

[Butler1998-11] Butler, R. Paul (1998). "A Precision Velocity Study of Photometrically Stable Stars in the Cepheid Instability Strip". Astrophysical Journal 494 (1): 342–365. doi:10.1086/305195. Bibcode: 1998ApJ...494..342B.

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Observation data Equinox J2000.0]] (ICRS)
Location of HR 1884 (circled)
Constellation	Auriga
Right ascension	05^h 36^m 52.41522^s^[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 (R_v)	−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^[1] mas
Distance	1,680 ± 50 ly (520 ± 20 pc)
Absolute magnitude (M_V)	−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

Topic: Astronomy

References