HD 1185

Binary star in the constellation Andromeda

HD 1185
Observation data Epoch J2000 Equinox J2000
Constellation	Andromeda
A
Right ascension	00^h 16^m 21.52890^s^[1]
Declination	+43° 35′ 42.1834″^[1]
Apparent magnitude (V)	6.150^[2]
B
Right ascension	00^h 16^m 22.33562^s^[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 (R_v)	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 mas^[1]
Distance	319 ± 1 ly (97.7 ± 0.3 pc)
B
Radial velocity (R_v)	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 mas^[3]
Distance	319.9 ± 0.5 ly (98.1 ± 0.2 pc)
Details
A
Mass	2.4^[1] `M`_☉
Radius	2.1^[1] `R`_☉
Luminosity	38^[1] `L`_☉
Surface gravity (log g)	4.02^[1] cgs
Temperature	9,103^[8] K
Metallicity [Fe/H]	−0.11^[8] dex
Rotational velocity (v sin i)	128^[9] km/s
Age	311^[1] Myr
B
Mass	1.0^[3] `M`_☉
Radius	0.90^[3] `R`_☉
Luminosity	0.76^[3] `L`_☉
Surface gravity (log g)	4.50^[3] cgs
Temperature	5,712^[8] K
Metallicity [Fe/H]	−0.26^[8] dex
Age	224^[3] Myr
Other designations
BD+42°41, HD 1185, HIP 1302, HR 56, SAO 36221, WDS 00164+4336^[10]
Database references
SIMBAD	data

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

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ 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.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ 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. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
^ ^a ^b Abt, H. A. (1981). "Visual multiples. VII. MK classifications". The Astrophysical Journal Supplement Series. 45: 437. Bibcode:1981ApJS...45..437A. doi:10.1086/190719.
^ ^a ^b ^c Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
^ 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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
^ ^a ^b ^c ^d Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1354....0A.
^ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
^ ^a ^b "BD+42 41B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 15 February 2014.
^ 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. Bibcode:1989AJ.....97..510M. doi:10.1086/115001.

External links

Image HD 1185
[1]

Constellation of Andromeda

Stars

Bayer	α (Alpheratz) β (Mirach) γ (Almach) δ ε ζ η θ ι κ λ μ ν ξ (Adhil) ο π ρ σ τ υ (Titawin) φ χ ψ ω A b c υ Per (Nembus)
Flamsteed	2 3 4 5 6 7 8 9 10 11 12 13 14 (Veritate) 15 18 22 23 26 28 32 36 39 41 44 45 47 55 56 58 59 63 64 65 66 6 Per
Variable	R T U W Z RT RV RX SU SW TU TW WZ XZ AB AC AD AE AF AR BM BX CC CG CN DS DX EG ET EU FF GP GQ GX GR GY HH HN IW KK KX KZ LL LN LP LQ OP OS OU PX PY QO QR QV QX V385 V428 V439 V455 V529 V807
HR	1 40 56 78 104 122 134 178 275 282 283 289 379 410 483 687 746 748 8884 8925 8950 8962 8973 9011 9074 9075 9105
HD	16175 (Buna) 222155
Other	3XMM J004232.1+411314 ADS 48 HAT-P-6 (Sterrennacht) HAT-P-16 HAT-P-19 HAT-P-28 M31-RV KELT-1 NGC 44 NGC 82 NGC 84 NGC 91 NGC 162 NGC 464 Qatar-3 Qatar-4 PA-99-N2 WASP-1 WISE 0146+4234 WISE J0005+3737 WISE J004945.61+215120.0

Exoplanets	14 Andromedae b κ Andromedae b υ Andromedae b c d Gliese 15 Ab c HD 13931 b HD 16175 b HAT-P-6b HAT-P-32b WASP-1b WASP-33b Qatar-4b Qatar-5b

Star
clusters

NGC	206 272 752 956 7686
Other	Mayall II RBC EXT8

Nebulae

NGC	7662

Galaxies

Messier	32 110
NGC	5 11 13 19 20 21 27 39 43 48 49 51 67 68 69 70 71 72 74 76 79 80 81 83 85 86 90 93 94 96 97 108 109 112 140 149 160 169 181 183 184 214 218 226 228 229 233 243 252 258 260 262 280 304 317 389 393 404 425 431 477 512 513 523 528 529 531 536 542 561 605 620 668 679 687 700 703 704 705 708 709 710 712 714 717 721 732 753 759 801 812 834 891 906 910 911 912 913 920 937 980 995 996 999 1000 7640 7836
Numbered	I II III IV V VIII IX X XI XVIII XIX XXI
Other	3C 66A 3C 66B Andromeda Galaxy Arp 273 Donatiello I