Astronomy:HD 31093
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Caelum |
| Right ascension | 04h 51m 28.21644s[1] |
| Declination | −34° 54′ 22.6341″[1] |
| Apparent magnitude (V) | 5.83±0.01[2] |
| Characteristics | |
| Spectral type | A1V + A4V[3] |
| U−B color index | +0.09[4] |
| B−V color index | +0.08[4] |
| Astrometry | |
| Radial velocity (Rv) | +24±1.8[5] km/s |
| Proper motion (μ) | RA: 24.90±0.33[1] mas/yr Dec.: −22.68±0.48[1] mas/yr |
| Parallax (π) | 12.17 ± 0.41[1] mas |
| Distance | 268 ± 9 ly (82 ± 3 pc) |
| Absolute magnitude (MV) | +1.25[6] (combined) |
| Orbit | |
| Period (P) | 43.36±4.34[7] yr |
| Semi-major axis (a) | 0.248±0.015[7]″ |
| Eccentricity (e) | 0.852[7] |
| Inclination (i) | 107±1[3]° |
| Longitude of the node (Ω) | 20±2[3]° |
| Argument of periastron (ω) (secondary) | 109±2[3]° |
| Details | |
| HD 31093 A | |
| Mass | 1.85 ± 0.21[3] M☉ |
| HD 31093 B | |
| Mass | 1.58 ± 0.18[3] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 31093, also known as HR 1559, is a visual binary located in the southern constellation Caelum, the chisel. The components have a combined apparent magnitude of 5.83,[2] making it faintly visible to the naked eye. Based on parallax measurements from the Hipparcos spacecraft, the system is estimated to be 268 light years distant.[1] They appear to be receding from the Solar System with a heliocentric radial velocity of 24 km/s.[5]
The components have stellar classifications of A1 and A4 V, indicating that both of them are A-type main-sequence stars. Since the components have a separation of 1⁄4 arcseconds, it is difficult to distinguish individually through a telescope. The primary has a mass 1.85 times that of the Sun while the secondary has a mass of 1.58 M☉.[3] They take 43 years to circle each other in an eccentric orbit.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Template:Cite New HIP red.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Docobo, J. A.; Andrade, M. (26 October 2012). "Dynamical and physical properties of 22 binaries discovered by W. S. Finsen". Monthly Notices of the Royal Astronomical Society 428 (1): 321–339. doi:10.1093/mnras/sts045. ISSN 0035-8711. Bibcode: 2013MNRAS.428..321D.
- ↑ 4.0 4.1 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data (SIMBAD), Bibcode: 1986EgUBV........0M
- ↑ 5.0 5.1 Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten 328 (9): 889–896. doi:10.1002/asna.200710776. ISSN 0004-6337. Bibcode: 2007AN....328..889K.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 7.3 Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (October 2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics 546: A69. doi:10.1051/0004-6361/201219774. ISSN 0004-6361. Bibcode: 2012A&A...546A..69M.
- ↑ "HD 31093". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+31093.
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