HR 9038
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 23h 52m 25.31799s[1] |
| Declination | +75° 32′ 40.5141″[1] |
| Apparent magnitude (V) | 6.40[2]/11.4[3] |
| Characteristics | |
| Spectral type | K3 V[4] + M2 |
| U−B color index | 0.70[2] |
| B−V color index | 0.98[2] |
| R−I color index | 0.5 |
| Astrometry | |
| Radial velocity (Rv) | +4.60[5] km/s |
| Proper motion (μ) | RA: 341.01[1] mas/yr Dec.: 41.50[1] mas/yr |
| Parallax (π) | 91.82 ± 0.30[1] mas |
| Distance | 35.5 ± 0.1 ly (10.89 ± 0.04 pc) |
| Orbit[3] | |
| Primary | HR 9038 A |
| Period (P) | 290 yr |
| Semi-major axis (a) | 4.14" |
| Eccentricity (e) | 0.55 |
| Details | |
| HR 9038 A | |
| Surface gravity (log g) | 4.71 ± 0.04[6] cgs |
| Temperature | 4,660 ± 110[6] K |
| Metallicity [Fe/H] | 6.62[6] dex |
| Other designations | |
| HR 9038 A: HD 223778, HIP 117712, HR 9038, SAO 10879 | |
HR 9038 is a ternary star system located thirty-five light-years away, in the constellation Cepheus. Component A is a spectroscopic binary system with an orbital period of 7.753 days and a combined stellar classification of K3 K.[7] Component B component is a red dwarf star that orbits the primary pair every 290 years.[3]
References
- 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M.
- 1 2 3 Malkov, O. Yu.; et al. (2012), "Dynamical masses of a selected sample of orbital binaries", Astronomy & Astrophysics 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69.
- ↑ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 3 Allende Prieto, C.; et al. (June 2004), "S4N: A spectroscopic survey of stars in the solar neighborhood. The Nearest 15 pc", Astronomy and Astrophysics 420: 183–205, arXiv:astro-ph/0403108, Bibcode:2004A&A...420..183A, doi:10.1051/0004-6361:20035801.
- ↑ Allen, Peter R.; et al. (August 2012), "Low-mass Tertiary Companions to Spectroscopic Binaries. I. Common Proper Motion Survey for Wide Companions Using 2MASS", The Astronomical Journal 144 (2): 12, Bibcode:2012AJ....144...62A, doi:10.1088/0004-6256/144/2/62, 62.
External links
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