V Centauri
Template:Short description Template:About-distinguish2
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 6.42 - 7.22[3] |
| Characteristics | |
| Spectral type | F5 Ib/II[4] |
| B−V Template:Engvar | 0.87[5] |
| Variable type | Classical Cepheid[3] |
| Astrometry | |
| Radial velocity (Rv) | −18.90 ± 1.4[6] km/s |
| Proper motion (μ) | RA: −6.697[2] mas/yr Dec.: −7.068[2] mas/yr |
| Parallax (π) | 1.3898±0.0221 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Details | |
| Mass | 4.3[7] Template:Solar mass |
| Radius | 40[2] Template:Solar radius |
| Luminosity | 1,657[8] Template:Solar luminosity |
| Surface gravity (log g) | 1.89[2] cgs |
| Temperature | 5,500[8] K |
| Metallicity [Fe/H] | +0.12[9] dex |
| Age | 103[10] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[5] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
V Centauri (V Cen) is a Classical Cepheid variable, a type of variable star, in the constellation Centaurus. It is approximately 2,350 light-years (720 parsecs) away based on parallax.
Alexander W. Roberts discovered this star in 1894, and from 267 visual observations he determined is period of variation.[11] V Centauri varies regularly between visual magnitudes 6.42 and 7.22 every 5.5 days. It is classified as a Cepheid variable on the basis of its light variations, with the brightness increase from minimum to maximum taking only a third of the time of the decrease from maximum to minimum. Cepheids are pulsating variable stars and V Centauri expands and contracts over its pulsation cycle as well as changing temperature.[3]
According to the South African Astronomical Observatory, the chemical composition was derived as being high in sodium (Na) and aluminium (Al) and low in magnesium (Mg).[12] Following a normal composition for a Cepheid star, V Cen does not have any unusual characteristics. V Centauri's composition was observed alongside six other Classical Cepheid variable stars with the support of Russian, Chilean, and Ukrainian observatories.[12]
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e f g Template:Cite Gaia DR3
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b 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".
- ↑ a b Script error: No such module "Citation/CS1".
Script error: No such module "Check for unknown parameters".