Astronomy:HD 1185

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Short description: Binary star in the constellation Andromeda
HD 1185
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation Andromeda
A
Right ascension  00h 16m 21.52890s[1]
Declination +43° 35′ 42.1834″[1]
Apparent magnitude (V) 6.150[2]
B
Right ascension  00h 16m 22.33562s[3]
Declination +43° 35′ 44.5452″[3]
Apparent magnitude (V) 9.76[4]
Characteristics
A
Evolutionary stage main sequence[1]
Spectral type A2VpSi[5]
U−B color index 0.03[6]
B−V color index 0.05[6]
Astrometry
A
Radial velocity (Rv)3.00±2.60[7] km/s
Proper motion (μ) RA: +35.421[1] mas/yr
Dec.: −23.037[1] mas/yr
Parallax (π)10.2349 ± 0.0329[1] mas
Distance319 ± 1 ly
(97.7 ± 0.3 pc)
B
Radial velocity (Rv)4.48±0.22[3] km/s
Proper motion (μ) RA: +34.310[3] mas/yr
Dec.: −21.927[3] mas/yr
Parallax (π)10.1971 ± 0.0157[3] mas
Distance319.9 ± 0.5 ly
(98.1 ± 0.2 pc)
Details
A
Mass2.4[1] M☉
Radius2.1[1] R☉
Luminosity38[1] L☉
Surface gravity (log g)4.02[1] cgs
Temperature9,103[8] K
Metallicity [Fe/H]−0.11[8] dex
Rotational velocity (v sin i)128[9] km/s
Age311[1] Myr
B
Mass1.0[3] M☉
Radius0.90[3] R☉
Luminosity0.76[3] L☉
Surface gravity (log g)4.50[3] cgs
Temperature5,712[8] K
Age224[3] Myr
Other designations
BD+42°41, HD 1185, HIP 1302, HR 56, SAO 36221, WDS 00164+4336[10]
Database references
SIMBADdata

HD 1185 is a double star[11] in the northern constellation of Andromeda. The primary, with an apparent magnitude of 6.15, is a white main-sequence star of spectral type A2VpSi,[5] indicating it has stronger silicon absorption lines than usual, thus making it also an Ap star.[6] The secondary companion, which is 9.08 arcseconds away, is not visible to the naked eye at an apparent magnitude of 9.76. It shares common proper motion and parallax with the primary star[10] but orbital parameters are still unknown.

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ Høg, E. et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics 355: L27–L30, Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ Fabricius, C; Høg, E; Makarov, V. V; Mason, B. D; Wycoff, G. L; Urban, S. E (2002). "The Tycho double star catalogue". Astronomy and Astrophysics 384: 180–189. doi:10.1051/0004-6361:20011822. Bibcode: 2002A&A...384..180F. 
  5. ↑ 5.0 5.1 Abt, H. A. (1981). "Visual multiples. VII. MK classifications". The Astrophysical Journal Supplement Series 45: 437. doi:10.1086/190719. Bibcode: 1981ApJS...45..437A. 
  6. ↑ 6.0 6.1 6.2 Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics 498 (3): 961–966, doi:10.1051/0004-6361/200810788, Bibcode: 2009A&A...498..961R. 
  7. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  8. ↑ 8.0 8.1 8.2 Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O. et al. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode: 2022yCat.1354....0A. 
  9. ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.  Vizier catalog entry
  10. ↑ 10.0 10.1 "BD+42 41B". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B42+41B. 
  11. ↑ McAlister, H. A. et al. (1989). "ICCD speckle observations of binary stars. IV - Measurements during 1986-1988 from the Kitt Peak 4 M telescope". The Astronomical Journal 97: 510. doi:10.1086/115001. Bibcode: 1989AJ.....97..510M. 

External links



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