Loading AI tools
Star in the constellation Centaurus From Wikipedia, the free encyclopedia
HD 113703, also known by the Bayer designation f Centauri, is a multiple star[9] system in the southern constellation of Centaurus. The combined apparent visual magnitude of this system is +4.71,[2] which is sufficient to make it faintly visible to the naked eye. The distance to this system is approximately 400 light years based on parallax measurements. It is a member of the Lower Centaurus Crux subgroup of the Scorpius–Centaurus association.[6]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 06m 16.70s[1] |
Declination | −48° 27′ 47.8″[1] |
Apparent magnitude (V) | +4.71[2] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | B4V[3] + K0Ve[4] |
U−B color index | −0.562[2] |
B−V color index | −0.148±0.006[2] |
Astrometry | |
Radial velocity (Rv) | +6.0±4.2[5] km/s |
Proper motion (μ) | RA: −29.558[1] mas/yr Dec.: −15.692[1] mas/yr |
Parallax (π) | 8.1592 ± 0.1559 mas[1] |
Distance | 400 ± 8 ly (123 ± 2 pc) |
Absolute magnitude (MV) | −0.68[2] |
Details | |
f Cen Aa | |
Mass | 4.39[6] M☉ |
Surface gravity (log g) | 3.99[6] cgs |
Temperature | 14,769[6] K |
Rotational velocity (v sin i) | 140±7[7] km/s |
Age | 92[6] Myr |
f Cen C | |
Mass | 0.9[8] M☉ |
Luminosity | 0.49[8] L☉ |
Temperature | 5,020[8] K |
Age | 50[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
The primary of f Centauri is a blue-white hued B-type main-sequence star with a stellar classification of B4V.[3] It is a young star with an age estimated at around 92 million years,[6] and is spinning rapidly with a projected rotational velocity of 140 km/s.[7] A close companion with a K magnitude of 9.16, designated component C, was detected in 2002 at an angular separation of 1.55″.[10] In 2013, a spectroscopic companion to the primary was observed using long baseline interferometry, with the two being designated components Aa and Ab.[11]
A faint, magnitude 10.8 companion, component B, was first reported by J. F. W. Herschel in 1836. As of 2015, it was located at a separation of 11.6″ along a position angle of 78°.[12] This is a K-type star with a class of K0Ve, showing emission in the Calcium H and K lines. It is a known BY Draconis variable star with the designation V1155 Centauri.[13] It shares a common space motion with the primary, indicating a probable physical relationship, and its Gaia Data Release 3 parallax of 7.965″±0.018″ suggests a distance of 409 light years.[14] The star shows a strong overabundance in lithium, which demonstrates its young age.[4] It is about 0.8 magnitudes above zero age main sequence and thus is still contracting as a post-T Tauri star.[15] X-ray emission has been detected from this star.[8]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.