HR 3082 - Misplaced Pages

Double star in the constellation Camelopardalis

HR 3082
Observation data Epoch J2000 Equinox J2000
Constellation	Camelopardalis
Right ascension	08 04 47.0589
Declination	+79° 28′ 46.610″
Apparent magnitude (V)	5.39
Characteristics
Spectral type	A0p Si or B9.5 IVs
B−V color index	−0.040±0.002
Astrometry

Radial velocity (R_v)	+2.7±0.8 km/s
Proper motion (μ)	RA: −28.922(74) mas/yr Dec.: −50.085(101) mas/yr
Parallax (π)	9.5700 ± 0.0876 mas
Distance	341 ± 3 ly (104.5 ± 1.0 pc)
Absolute magnitude (M_V)	0.32±0.12

Details

Mass	2.65±0.06 `M`_☉
Radius	2.89 `R`_☉
Luminosity	74+9 −8 `L`_☉
Surface gravity (log g)	3.94±0.14 cgs
Temperature	10,795±367 K
Rotational velocity (v sin i)	30 km/s
Age	36 Myr

Other designations
BD+79° 265, FK5 2617, HD 64486, HIP 39538, HR 2527, SAO 6392, WDS J08048+7929AB
Database references
SIMBAD	data

HR 3082 is a double star in the northern circumpolar constellation of Camelopardalis. It is faintly visible to the naked eye with an apparent visual magnitude of 5.39. The system is moving closer to the Sun with a heliocentric radial velocity of +2.7 km/s. It is currently at a distance of around 341 light years, based upon an annual parallax shift of 9.57 mas.

The brighter component is a magnetic, mild Ap star that displays an overabundance of silicon in its spectrum. Cowley et al. (1969) listed a stellar classification of A0p Si, while Abt and Morrell (1995) have it pegged as a subgiant star with a class of B9.5 IVs. It has an estimated 2.65 times the mass of the Sun and 2.89 times the Sun's radius. The star is radiating 74 times the Sun's luminosity from its photosphere at an effective temperature of 10,795 K.

The fainter component is a magnitude 9.6 star at an angular separation of 0.4″ along a position angle (PA) of 84°, as of 2009. This is most likely a visual companion located along the same line of sight. There is a magnitude 13.6 visual companion at a separation of 6.4″ along a PA of 169°, as of 2016.

References

^ 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.
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
^ Abt, Helmut A.; Morrell, Nidia I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
^ 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.
^ Kochukhov, O.; Bagnulo, S. (2006), "Evolutionary state of magnetic chemically peculiar stars", Astronomy and Astrophysics, 450 (2): 763, arXiv:astro-ph/0601461, Bibcode:2006A&A...450..763K, doi:10.1051/0004-6361:20054596, S2CID 18596834.
^ Shulyak, D.; et al. (September 2014), "Interferometry of chemically peculiar stars: theoretical predictions versus modern observing facilities", Monthly Notices of the Royal Astronomical Society, 443 (2): 1629–1642, arXiv:1406.6093, Bibcode:2014MNRAS.443.1629S, doi:10.1093/mnras/stu1259.
^ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
"HD 49878". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-06-06.
Adelman, S. J. (September 1982), "Spectrophotometry of peculiar B and A stars. XII - HD 10783, 56 Tauri, HD 43819, 53 Aurigae, 49 Camelopardalis, HD 64486, HD 147550, HD 184905 and HD 192913", Astronomy and Astrophysics Supplement Series, 49: 663–672, Bibcode:1982A&AS...49..663A.
^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

Constellation of Camelopardalis

Stars

Bayer	α β γ
Flamsteed	1 2 3 4 5 7 8 11 12 14 15 16 17 18 19 20 21 22 23 24 26 28 29 30 31 33 34 35 36 37 38 39 40 41 42 43 49 51 53
Variable	U Z RU ST TX VZ BD BE BK BN CE CO CQ CS DD MY
HR	967 1046 1073 1112 1124 1129 1138 1158 1192 1204 1205 1241 1242 1305 1313 1314 1327 1335 1342 1401 1440 1491 1527 1561 1624 1636 (Mago) 1675 1683 1686 1720 1844 1916 2209 2363 2396 2401 2527 2581 2830 3075 3082 3216 4062 4084 4609 (Tonatiuh) 4892 4893 5009 5091 5203
HD	35759
Other	2MASS J05325346+8246465 Gliese 445 NGC 2363-V1 PSR B0329+54 Stein 2051 Struve 1694 XO-3 XO-6

Exoplanets	HD 32518 b HD 33564 b HD 104985 b XO-3b XO-6b

Star clusters	NGC 1502

Nebulae	IC 3568 (Lemon Slice Nebula) M4-18 NGC 1501 NGC 2404

Galaxies

NGC	1530 1560 1569 1573 1573A 1961 2146 2336 2363 2366 2403 2441 2460 2523 2655 2715 2748 5640
Other	DDO 44 IC 342 IRAS 07598+6508 MACS0647-JD UGC 3478 UGC 3730 UGCA 86

Galaxy clusters	MACS J0647.7+7015 MS 0735.6+7421

Astronomical events	SN 1996ah GRB 970508 SN 2004dj SN 2010lt