Alpha Antliae

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α Antliae
Antlia constellation map.png
Antlia constellation
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Antlia
Right ascension 10h 27m 09.1011s[1]
Declination −31° 04′ 04.004″[1]
Apparent magnitude (V) 4.22 to 4.29[2]
Characteristics
Spectral type K4III[3]
U-B color index +1.63[4]
B-V color index +1.45[4]
R-I color index +0.79[4]
Variable type Suspected[2]
Astrometry
Radial velocity (Rv) 12.2 ± 2[5] km/s
Proper motion (μ) RA: −80.42[1] mas/yr
Dec.: 9.63[1] mas/yr
Parallax (π) 8.90 ± 0.68[1] mas
Distance 370 ± 30 ly
(112 ± 9 pc)
Absolute magnitude (MV) −1.0[6]
Details
Mass 2.2[7] M☉
Radius 53[8] R☉
Surface gravity (log g) 1.77[9]
Luminosity (bolometric) 555[7] L☉
Temperature 3990[9] K
Metallicity \begin{smallmatrix}\left[ \frac{Fe}{H} \right]\ =\ -0.39\end{smallmatrix}[9]
Other designations
α Ant, Alpha Antliae, Alpha Ant, 2MASS J10270911-3104039, CD−30 8465, CPC 17 5084, CPD−30 3121, FK5 392, GC 14352, HD 90610, HIP 51172, HR 4104, NSV 4862, PPM 287713, SAO 201405.[10]
Database references
SIMBAD data

Alpha Antliae (Alpha Ant / α Antliae / α Ant) is the brightest star in the constellation of Antlia but it has not been given a proper name.[11] It is a K-type giant star and has an apparent visual magnitude which varies between 4.22 and 4.29. It is approximately 370 light-years from the Earth.[2][10]

[edit] References

  1. ^ a b c d e Perryman, M. A. C. et al (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode: 1997A&A...323L..49P. 
  2. ^ a b c NSV 4862, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line October 3, 2008.
  3. ^ Houk, Nancy (1983). Michigan catalogue of two-dimensional spectral types for the HD stars. Michigan Spectral Survey. 3. University of Michigan. http://cdsarc.u-strasbg.fr/cgi-bin/qcat?III/80. Retrieved 2009-10-22. 
  4. ^ a b c Hoffleit, D.; Warren, Jr., W. H.. "HR 4104". The Bright Star Catalogue. Centre de Données astronomiques de Strasbourg. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=4104. Retrieved 2008-10-03. 
  5. ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". in Batten, Alan Henry; Heard, John Frederick. Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. http://adsabs.harvard.edu/abs/1967IAUS...30...57E. Retrieved 2009-09-10. 
  6. ^ From apparent magnitude and parallax.
  7. ^ a b Alpha Antliae, Stars, Jim Kaler. Accessed on line October 3, 2008.
  8. ^ HD 90610, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line October 3, 2008.
  9. ^ a b c McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". Astrophysical Journal Supplement Series 74: 1075-1128. doi:10.1086/191527. 
  10. ^ a b NSV 4862 -- Variable Star, database entry, SIMBAD. Accessed on line October 3, 2008.
  11. ^ Schneider, Howard; Wood, Sandy (2009). National Geographic Backyard Guide to the Night Sky. National Geographic Books. p. 173. ISBN 1426202814. 

[edit] External links

v • d • e
Stars of Antlia
ε • ζ1 • ζ2 • θ • η • α • δ • ι
List

Coordinates: Sky map 10h 27m 09.1011s, +31° 04′ 04.004″

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