Beta Circini

β Circini


Location of β Circini (circled)

Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Circinus
Right ascension 15h 17m 30.8494s[1]
Declination −58° 48 04.349[1]
Apparent magnitude (V) 4.069[1]
Characteristics
Spectral type A3Va[1]
U−B color index +0.09[2]
B−V color index +0.09[2]
Astrometry
Radial velocity (Rv)9.6 ± 2[1] km/s
Proper motion (μ) RA: −98.39[1] mas/yr
Dec.: −135.46[1] mas/yr
Parallax (π)33.75 ± 0.75[1] mas
Distance97 ± 2 ly
(29.6 ± 0.7 pc)
Absolute magnitude (MV)1.71[3]
Details
Radius1.3[4] R
Surface gravity (log g)4.281[5] cgs
Temperature8,892[5] K
Rotational velocity (v sin i)59[2] km/s
Age166+212
−116
[5] Myr
Other designations
β Cir, Beta Circini, Beta Cir, CPD−58 5875, FK5 561, GC 20526, GJ 580.1, GJ 9516, HD 135379, HIP 74824, HR 5670, PPM 343590, SAO 242384.[1]
Database references
SIMBADdata

Beta Circini (Beta Cir, β Circini, β Cir) is an A-type main sequence star and is the second brightest star in the constellation of Circinus.[1] It has an apparent visual magnitude of approximately 4.069.[1] It has one known planet β Circini b.

Planetary System

The β Circini planetary system[6]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
β Circini b 56.0 (± 7.0) MJ 6656.0

References

  1. 1 2 3 4 5 6 7 8 9 10 11 * bet Cir -- Star, database entry, SIMBAD. Accessed on line September 5, 2008.
  2. 1 2 3 HR 5670, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 5, 2008.
  3. From apparent magnitude and parallax.
  4. HD 135379, 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 September 5, 2008.
  5. 1 2 3 Song, Inseok; et al. (February 2001), "Ages of A-Type Vega-like Stars from uvbyβ Photometry", The Astrophysical Journal 546 (1): 352–357, arXiv:astro-ph/0010102, Bibcode:2001ApJ...546..352S, doi:10.1086/318269
  6. "β Circini b". Retrieved 2015-10-30.


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