Epsilon Microscopii

ε Microscopii


Location of ε Microscopii (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Microscopium
Right ascension 21h 17m 56.28399s[1]
Declination −32° 10′ 21.1515″[1]
Apparent magnitude (V) 4.71[2]
Characteristics
Spectral type A1V[3]
U−B color index +0.02[4]
B−V color index +0.06[4]
Astrometry
Radial velocity (Rv)+7.20[5] km/s
Proper motion (μ) RA: +54.36[1] mas/yr
Dec.: -23.29[1] mas/yr
Parallax (π)17.90 ± 0.23[1] mas
Distance182 ± 2 ly
(55.9 ± 0.7 pc)
Absolute magnitude (MV)0.97[2]
Details
Mass2.18[6] M☉
Radius2.2[6] R☉
Luminosity35.62[2] L☉
Surface gravity (log g)4.37[7] cgs
Temperature9,126[7] K
Metallicity [Fe/H]-0.01[8] dex
Rotational velocity (v sin i)127[3] km/s
Other designations
Epsilon Microscopii, Epsilon Mic, ε Mic, CD-32 16498, CPD−32 6329, FK5 801, GC 29774, HIP 105140, HR 8135, HD 202627, SAO 212874
Database references
SIMBADdata

Epsilon Microscopii (ε Mic) is a class A1V[3] (white main-sequence) star in the constellation Microscopium. Its apparent magnitude is 4.71[2] and it is approximately 182 light years away based on parallax.[1]

Epsilon Microscopii was a latter designation of 4 Piscis Austrini.[9]

References

  1. 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
  3. 1 2 3 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.
  4. 1 2 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
  5. ↑ 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.
  6. 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. arXiv:astro-ph/9911002Freely accessible. Bibcode:1999A&A...352..555A. Vizier catalog entry
  7. 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. arXiv:1501.03154Freely accessible. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
  8. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814Freely accessible. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. Vizier catalog entry
  9. ↑ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy, Vol.18, NO. 3/AUG, P.209, 1987. 18: 220. Bibcode:1987JHA....18..209W.
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