Beta Circini
  | |
| 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 mas[1] |
| Distance | 97 ± 2 ly (29.6 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.71[3] |
| Details | |
| Radius | 1.3[4] R☉ |
| Surface gravity (log g) | 4.281[5] cgs |
| Temperature | 8,892[5] K |
| Rotational velocity (v sin i) | 59[2] km/s |
| Age | 166+212 −116[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
| 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
- ^ a b c d e f g h i j k * bet Cir -- Star, database entry, SIMBAD. Accessed on line September 5, 2008.
- ^ a b c 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.
- ^ From apparent magnitude and parallax.
- ^ 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.
- ^ a b c 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
- ^ "β Circini b". Retrieved 2015-10-30.
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