HR 9038

HR 9038 A/B/C
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
Distance35.5 ± 0.1 ly
(10.89 ± 0.04 pc)
Orbit[3]
PrimaryHR 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
Temperature4,660 ± 110[6] K
Metallicity [Fe/H]-0.93[6] dex
Other designations
BD+74 1047, GJ 909, WDS J23524+7533
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. 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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.
  3. 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.
  4. ↑ 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/0603770Freely accessible, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  5. ↑ 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.
  6. 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/0403108Freely accessible, Bibcode:2004A&A...420..183A, doi:10.1051/0004-6361:20035801.
  7. ↑ 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, arXiv:1206.4289Freely accessible, Bibcode:2012AJ....144...62A, doi:10.1088/0004-6256/144/2/62, 62.


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