Epsilon Sculptoris

ε Sculptoris


Location of ε Sculptoris (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Sculptor
Right ascension 01h 45m 38.75712s[1]
Declination −25° 03′ 09.4022″[1]
Apparent magnitude (V) 5.29[2]
Characteristics
Spectral type F2V[3] + G9V[4]
U−B color index +0.01[5]
B−V color index +0.39[6]
Astrometry
Radial velocity (Rv)+13.10[7] km/s
Proper motion (μ) RA: +159.36[1] mas/yr
Dec.: -73.17[1] mas/yr
Parallax (π)35.57 ± 0.52[1] mas
Distance92 ± 1 ly
(28.1 ± 0.4 pc)
Absolute magnitude (MV)3.05[2]
Details
ε Scl A
Mass1.37[8] M☉
Radius1.5[8] R☉
Luminosity5.07[2] L☉
Surface gravity (log g)4.24[9] cgs
Temperature6,809[9] K
Metallicity [Fe/H]-0.02[2] dex
Rotational velocity (v sin i)86[10] km/s
Other designations
ADS 1394, CCDM J01456-2504AB, CD-25°704, FK5 61, GC 2145, HD 10830, HIP 8209, HR 514, SAO 167275, WDS J01456-2503AB
Database references
SIMBADdata

Epsilon Sculptoris (ε Scl, ε Sculptoris) is a binary star[11] in the constellation Sculptor. It is approximately 91.7 light years from Earth.[1]

The primary component, Epsilon Sculptoris A, is a yellow-white F-type main-sequence star[3] with an apparent magnitude of +5.29[2] with an angular diameter of 000509 arcseconds. Orbiting it with a separation of 4.6 arcseconds, or at least 125 Astronomical Units, is Epsilon Sculptoris B, a yellow G-type main sequence dwarf with an apparent magnitude of +8.6. A and B make one orbit around their centre of mass once every 1200 years.[12]

There are two optical companions, the 15th magnitude designated Epsilon Sculptoris C at an angular separation of 15 arcseconds and the 11th magnitude Epsilon Sculptoris D, at a separation of 142 arcseconds.[13]

This star will be in constellation Fornax around 2920 CE.[14]

References

  1. 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 Freely accessible. doi:10.1134/S1063773712050015. Vizier catalog entry
  3. 1 2 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132: 161. Bibcode:2006AJ....132..161G. arXiv:astro-ph/0603770 Freely accessible. doi:10.1086/504637.
  4. ↑ Edwards, T. W. (1976). "MK classification for visual binary components". The Astronomical Journal. 81: 245. Bibcode:1976AJ.....81..245E. doi:10.1086/111879.
  5. ↑ Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
  6. ↑ Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  7. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  8. 1 2 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. Bibcode:1999A&A...352..555A. arXiv:astro-ph/9911002 Freely accessible. Vizier catalog entry
  9. 1 2 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. Bibcode:2015ApJ...804..146D. arXiv:1501.03154 Freely accessible. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
  10. ↑ Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  11. ↑ 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, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 Freely accessible, doi:10.1111/j.1365-2966.2008.13596.x.
  12. ↑ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. Vizier catalog entry
  13. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
  14. ↑ p. 296, Patrick Moore's Data Book of Astronomy, Patrick Moore and Robin Rees, Cambridge, Cambridge University Press, 2011.
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