Sigma Centauri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Centaurus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 3.91[2] |
| Characteristics | |
| Spectral type | B3 V[3] |
| U−B Template:Engvar | −0.805[2] |
| B−V Template:Engvar | −0.202[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: −32.36[1] mas/yr Dec.: −12.51[1] mas/yr |
| Parallax (π) | 7.92±0.18 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −1.60[5] |
| Details | |
| Mass | Script error: No such module "val".[3] Template:Solar mass |
| Radius | 4.5[6] Template:Solar radius |
| Luminosity | 1,101[7] Template:Solar luminosity |
| Temperature | 15,744[7] K |
| Rotational velocity (v sin i) | 169[4] km/s |
| Age | Script error: No such module "val".[3] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| σ Cen, CD−49°7115, FK5 464, HD 108483, HIP 60823, HR 4743, SAO 223454.[8] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
Sigma Centauri, Latinized from σ Centauri, is the Bayer designation for a solitary[9] star in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of 3.91.[2] A visual companion at an angular separation of Script error: No such module "val". along a position angle of Script error: No such module "val". was detected in 2010 using interferometry,[10] but its association with Sigma Centauri remains undetermined as of 2013.[11] The distance to Sigma Centauri, based upon an annual parallax shift of 7.92 mas,[1] is around 412 light years.
This is a B-type main sequence star with a stellar classification of B3 V.[3] It is a helium-rich star, the most massive type of chemically peculiar star.[12] Sigma Centauri has around 6.8 times the mass of the Sun and 4.5 times the Sun's radius.[6] It has a relatively high rate of spin with a projected rotational velocity of 169 km/s,[4] and is around 25 million years old.[3] The star radiates 1,101 times the solar luminosity from its outer atmosphere at an effective temperature of 15,744 K.[7] It is a member of the Lower Centaurus Crux component of the Scorpius–Centaurus association.[4]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".