Psi Scorpii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.94[2] |
| Characteristics | |
| Spectral type | A1 V[3] |
| U−B Template:Engvar | +0.11[2] |
| B−V Template:Engvar | +0.09[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.10[4] km/s |
| Proper motion (μ) | RA: −18.000[1] mas/yr Dec.: −36.188[1] mas/yr |
| Parallax (π) | 20.1801±0.2617 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +1.55[5] |
| Details | |
| Mass | Script error: No such module "val".[6] Template:Solar mass |
| Radius | Script error: No such module "val".[6] Template:Solar radius |
| Luminosity | 18.6[7] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[6] cgs |
| Temperature | Script error: No such module "val".[6] K |
| Rotational velocity (v sin i) | Script error: No such module "val".[8] km/s |
| Age | 451[9] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[10] | |
| Database references | |
| SIMBAD | data |
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Psi Scorpii, which is Latinized from ψ Scorpii, is a star in the zodiac constellation of Scorpius. It is white in hue and has an apparent visual magnitude of 4.94,[2] which is bright enough to be faintly visible to the naked eye. Based upon parallax measurements,[1] it is located at a distance of around 162 light years from the Sun. Data collected during the Hipparcos mission suggests it is an astrometric binary, although nothing is known about the companion.[11][12] The system is drifting closer to the Sun with a radial velocity of −5 km/s.[4]
The visible component is an A-type main sequence star with a stellar classification of A1 V;[3] a class of star that is still fusing hydrogen at its core. It has around 2.2 the mass and 2.08 times the radius of the Sun,[6] and is shining with 18.6 times the Sun's luminosity.[7] The effective temperature of the star's outer atmosphere is 8,650 K.[6] Psi Scorpii is around 451 million years old and is spinning with a projected rotational velocity of 42.3 km/s.[9]
References
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- ↑ a b c d e f Template:Cite DR2
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e f Script error: No such module "citation/CS1". Psi Scorpii's database entry at VizieR.
- ↑ a b 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".
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External links
- Script error: No such module "citation/CS1".