HD 73389: Difference between revisions
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{{Short description| |
{{Short description|Binary star system in the constellation Carina}} |
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{{about|e<sup>2</sup> Carinae|e<sup>1</sup> Carinae|HD 73390|E Carinae|V345 Carinae}} |
{{about|e<sup>2</sup> Carinae|e<sup>1</sup> Carinae|HD 73390|E Carinae|V345 Carinae}} |
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{{distinguish|ε Carinae}} |
{{distinguish|ε Carinae}} |
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| journal=Monthly Notices of the Royal Astronomical Society |
| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=389 | issue=2 | pages=869 | date=2008 |
| volume=389 | issue=2 | pages=869 | date=2008 |
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| doi=10.1111/j.1365-2966.2008.13596.x | arxiv=0806.2878 |
| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | arxiv=0806.2878 |
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| bibcode=2008MNRAS.389..869E | s2cid=14878976 | postscript=. }}</ref> |
| bibcode=2008MNRAS.389..869E | s2cid=14878976 | postscript=. }}</ref> |
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| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. |
| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. |
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| title=The Washington Visual Double Star Catalog |
| title=The Washington Visual Double Star Catalog |
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| year=2014 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 |
| journal=The Astronomical Journal | year=2014 | volume=122 | issue=6 | page=3466 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 |
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| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds |
| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds |
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| access-date=2015-07-22 | doi-access=free }}</ref> |
| access-date=2015-07-22 | doi-access=free }}</ref> |
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[[Category:Henry Draper Catalogue objects|073389]] |
[[Category:Henry Draper Catalogue objects|073389]] |
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[[Category:Hipparcos objects|042134]] |
[[Category:Hipparcos objects|042134]] |
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[[Category: |
[[Category:Bright Star Catalogue objects|3414]] |
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Latest revision as of 19:54, 18 July 2024
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 35m 19.70886s[1] |
| Declination | −58° 00′ 33.2714″[1] |
| Apparent magnitude (V) | +4.84[2] (5.08 + 8.02)[3] |
| Characteristics | |
| Spectral type | K0III[4] |
| B−V color index | 0.981±0.041[2] |
| Astrometry | |
| Radial velocity (Rv) | +25.62±0.13[1] km/s |
| Proper motion (μ) | RA: +52.848±0.555[1] mas/yr Dec.: +28.117±0.491[1] mas/yr |
| Parallax (π) | 14.5139 ± 0.2692 mas[1] |
| Distance | 225 ± 4 ly (69 ± 1 pc) |
| Absolute magnitude (MV) | 0.68[2] |
| Details | |
| A | |
| Radius | 11.13+1.11 −0.39[1] R☉ |
| Luminosity | 64.4±1.4[1] L☉ |
| Temperature | 4,903+87 −229[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 73389 is a binary star[3] system in the constellation Carina. It has the Bayer designation e2 Carinae; HD 73389 is the identifier from the Henry Draper Catalogue. This system is visible to the naked eye as a point of light with a combined apparent visual magnitude of +4.84.[2] Based on parallax measurements, it is located at a distance of approximately 225 light years from the Sun. The system is drifting further away with a radial velocity of +25.6 km/s.[1]
The visual magnitude 5.08 primary, component A, is an aging K-type giant star with a stellar classification of K0III.[4] With the supply of hydrogen at its core exhausted, it has cooled and expanded to 11 times the Sun's radius.[1] It is radiating 64 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,903 K.[1] The secondary companion, component B, has a visual magnitude of 8.02 and is located at an angular separation of 0.30″ along a position angle of 207° from the primary, as of 2015.[6]
References
[edit]- ^ a b c d e f g h i j k l 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 d 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.
- ^ a b Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ^ "HD 73389". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-11.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
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