Astronomy:Epsilon Sculptoris

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Short description: Binary star system in the constellation Sculptor
ε Sculptoris
Location of ε Sculptoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sculptor[1]
Right ascension  01h 45m 38.75712s[2]
Declination −25° 03′ 09.4022″[2]
Apparent magnitude (V) 5.29[1]
Characteristics
A
Evolutionary stage main sequence[3]
Spectral type F2V[4]
U−B color index +0.01[5]
B−V color index +0.40[5]
B
Evolutionary stage main sequence[6]
Spectral type G9V[7]
Astrometry
Radial velocity (Rv)+13.10[8] km/s
Absolute magnitude (MV)+3.05[1]
A
Proper motion (μ) RA: +165.847[3] mas/yr
Dec.: −49.654[3] mas/yr
Parallax (π)35.6418 ± 0.0719[3] mas
Distance91.5 ± 0.2 ly
(28.06 ± 0.06 pc)
B
Proper motion (μ) RA: +138.593[9] mas/yr
Dec.: −44.200[9] mas/yr
Parallax (π)35.7514 ± 0.0313[9] mas
Distance91.23 ± 0.08 ly
(27.97 ± 0.02 pc)
Orbit[10]
Period (P)2,198.3 yr
Semi-major axis (a)17.06″
Eccentricity (e)0.857
Inclination (i)105.3°
Details
ε Scl A
Mass1.44[11] M☉
Radius1.5[12] R☉
Luminosity5.07[1] L☉
Surface gravity (log g)4.24[13] cgs
Temperature6,809[13] K
Metallicity [Fe/H]−0.02[1] dex
Rotational velocity (v sin i)86[14] km/s
Age1.6[3] Gyr
ε Scl B
Mass0.84[11] M☉
Radius0.74[15] R☉
Luminosity0.30[15] L☉
Surface gravity (log g)4.62[15] cgs
Temperature4,973[15] K
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[16] in the constellation Sculptor. It is 91 light years from Earth and has a combined apparent magnitude of +5.29.

The primary component, Epsilon Sculptoris A, is a yellow-white F-type main-sequence star[4] with an apparent magnitude of +5.34.[17] 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 +8.50.[18] A and B make one orbit around their centre of mass once every 1200 years.[19]

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.[20] Both these faint stars have small Gaia parallaxes indicating a much greater distance than the Epsilon Sculptoris pair.[21]

This star will be in constellation Fornax around 2920 CE.[22]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.  Vizier catalog entry
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 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 (1): 161–170. doi:10.1086/504637. Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 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. ↑ Tuchow, Noah W.; Stark, Christopher C.; Mamajek, Eric (2024). "HPIC: The Habitable Worlds Observatory Preliminary Input Catalog". The Astronomical Journal 167 (3): 139. doi:10.3847/1538-3881/ad25ec. Bibcode: 2024AJ....167..139T. 
  7. ↑ Edwards, T. W. (1976). "MK classification for visual binary components". The Astronomical Journal 81: 245. doi:10.1086/111879. Bibcode: 1976AJ.....81..245E. 
  8. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  9. ↑ 9.0 9.1 9.2 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  10. ↑ Izmailov, I. S. (2019). "The Orbits of 451 Wide Visual Double Stars". Astronomy Letters 45 (1): 30–38. doi:10.1134/S106377371901002X. Bibcode: 2019AstL...45...30I. 
  11. ↑ 11.0 11.1 Tokovinin, A.; Kiyaeva, O. (2016). "Eccentricity distribution of wide binaries". Monthly Notices of the Royal Astronomical Society 456 (2): 2070–2079. doi:10.1093/mnras/stv2825. Bibcode: 2016MNRAS.456.2070T.  Vizier catalog entry
  12. ↑ 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: 555–562. Bibcode: 1999A&A...352..555A.  Vizier catalog entry
  13. ↑ 13.0 13.1 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. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D.  Vizier catalog entry
  14. ↑ 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. 
  15. ↑ 15.0 15.1 15.2 15.3 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  16. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  17. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H. 
  18. ↑ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode: 2012yCat.1322....0Z. 
  19. ↑ 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. doi:10.1051/0004-6361/201219774. Bibcode: 2012A&A...546A..69M.  Vizier catalog entry
  20. ↑ 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. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.  Vizier catalog entry
  21. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.</ref name=dr3d>Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  22. ↑ Patrick Moore; Robin Rees (2014). Patrick Moore's Data Book of Astronomy. Cambridge: Cambridge University Press. p. 296. ISBN 978-1-139-49522-6. https://books.google.com/books?id=2FNfjWKBZx8C. 



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