Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Scorpius |
Right ascension | 15h 50m 58.74452s [1] |
Declination | −25° 45′ 04.6649″ [1] |
Apparent magnitude (V) | 4.63 [2] |
Characteristics | |
Spectral type | B1.5 Vn [3] |
B−V color index | −0.072±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −3.0±4.7 [4] km/s |
Proper motion (μ) |
RA: −14.20
[1]
mas/
yr Dec.: −25.12 [1] mas/ yr |
Parallax (π) | 6.59 ± 0.27 mas [1] |
Distance | 490 ± 20
ly (152 ± 6 pc) |
Absolute magnitude (MV) | −1.27 [2] |
Details | |
Mass | 8.3±0.2 [5] M☉ |
Radius | 3.7 [6] R☉ |
Luminosity | 3,890 [6] L☉ |
Temperature | 24,000 [6] K |
Rotational velocity (v sin i) | 310 [7] km/s |
Age | 10.3±5.3 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
1 Scorpii, or b Scorpii, is a single [9] star in the southern zodiac constellation of Scorpius. It has an apparent magnitude of 4.63, [2] which is bright enough to be faintly visible to the naked eye on a dark night. The star shows an annual parallax shift of 6.59 mas from Earth's orbit, which equates to a distance of roughly 490 light years. It is a probable (89% chance) member of the Sco OB2 moving group. [10] [9]
This is a B-type main-sequence star with a stellar classification of B1.5 Vn, [3] where the 'n' suffix indicates "nebulous" absorption lines being induced by rapid rotation. It has a projected rotational velocity of 310 km/s, which is giving the star an oblate shape with an equatorial bulge that is 13% wider than the polar radius. [7] There is some weak evidence that this is a Be star with a gaseous disk that is being viewed edge-on. [11]
1 Scorpii is a young star at around 10 [5] million years old, with 8.3 [5] times the mass of the Sun and 3.7 times the Sun's radius. [6] The star is radiating 3,890 times the Sun's luminosity from its photosphere at an effective temperature of about 24,000 K. [6]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Scorpius |
Right ascension | 15h 50m 58.74452s [1] |
Declination | −25° 45′ 04.6649″ [1] |
Apparent magnitude (V) | 4.63 [2] |
Characteristics | |
Spectral type | B1.5 Vn [3] |
B−V color index | −0.072±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −3.0±4.7 [4] km/s |
Proper motion (μ) |
RA: −14.20
[1]
mas/
yr Dec.: −25.12 [1] mas/ yr |
Parallax (π) | 6.59 ± 0.27 mas [1] |
Distance | 490 ± 20
ly (152 ± 6 pc) |
Absolute magnitude (MV) | −1.27 [2] |
Details | |
Mass | 8.3±0.2 [5] M☉ |
Radius | 3.7 [6] R☉ |
Luminosity | 3,890 [6] L☉ |
Temperature | 24,000 [6] K |
Rotational velocity (v sin i) | 310 [7] km/s |
Age | 10.3±5.3 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
1 Scorpii, or b Scorpii, is a single [9] star in the southern zodiac constellation of Scorpius. It has an apparent magnitude of 4.63, [2] which is bright enough to be faintly visible to the naked eye on a dark night. The star shows an annual parallax shift of 6.59 mas from Earth's orbit, which equates to a distance of roughly 490 light years. It is a probable (89% chance) member of the Sco OB2 moving group. [10] [9]
This is a B-type main-sequence star with a stellar classification of B1.5 Vn, [3] where the 'n' suffix indicates "nebulous" absorption lines being induced by rapid rotation. It has a projected rotational velocity of 310 km/s, which is giving the star an oblate shape with an equatorial bulge that is 13% wider than the polar radius. [7] There is some weak evidence that this is a Be star with a gaseous disk that is being viewed edge-on. [11]
1 Scorpii is a young star at around 10 [5] million years old, with 8.3 [5] times the mass of the Sun and 3.7 times the Sun's radius. [6] The star is radiating 3,890 times the Sun's luminosity from its photosphere at an effective temperature of about 24,000 K. [6]