Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 42m 42.89190s [1] |
Declination | −38° 27′ 48.5416″ [1] |
Apparent magnitude (V) | +6.05 [2] (6.612 + 7.041) [3] |
Characteristics | |
Spectral type | B9.5 V [4] + A9(V) [5] |
U−B color index | −0.13 [2] |
B−V color index | −0.03 [2] |
Astrometry | |
Radial velocity (Rv) | 11.1±0.6 [6] km/s |
Proper motion (μ) |
RA: +2.56
[1]
mas/
yr Dec.: −6.72 [1] mas/ yr |
Parallax (π) | 6.89 ± 0.71 mas [1] |
Distance | approx. 470
ly (approx. 150 pc) |
Absolute magnitude (MV) | +0.27 [7] |
Details | |
λ1 Scl A | |
Mass | 2.83±0.13 [8] M☉ |
Luminosity | 94 [8] L☉ |
Temperature | 10,351 [8] K |
Rotational velocity (v sin i) | 35 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Lambda1 Sculptoris, Latinised from λ1 Sculptoris, is a double star system in the southern constellation of Sculptor. It is close to the lower limit of visibility to the naked eye, with a combined apparent visual magnitude of +6.05. [2] Based upon an annual parallax shift of 6.89 mas as measured from Earth, [1] it is located roughly 470 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.026 due to interstellar dust. [10]
The brighter star, component A, has a visual magnitude of 6.6, while the secondary, component B, is magnitude 7.0. [3] As of 2000, the pair had an angular separation of 0.737 arcsecond along a position angle of 14.0°. [3] Component A is a blue-white-hued B-type main-sequence star with a stellar classification of B9.5 V. [4] It has 2.8 times the mass of the Sun and radiates 94 times the solar luminosity from its photosphere at an effective temperature of 10,351 K. [8] The mass ratio is 0.609, meaning the secondary is only 60.9% as massive as the primary. [11]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 42m 42.89190s [1] |
Declination | −38° 27′ 48.5416″ [1] |
Apparent magnitude (V) | +6.05 [2] (6.612 + 7.041) [3] |
Characteristics | |
Spectral type | B9.5 V [4] + A9(V) [5] |
U−B color index | −0.13 [2] |
B−V color index | −0.03 [2] |
Astrometry | |
Radial velocity (Rv) | 11.1±0.6 [6] km/s |
Proper motion (μ) |
RA: +2.56
[1]
mas/
yr Dec.: −6.72 [1] mas/ yr |
Parallax (π) | 6.89 ± 0.71 mas [1] |
Distance | approx. 470
ly (approx. 150 pc) |
Absolute magnitude (MV) | +0.27 [7] |
Details | |
λ1 Scl A | |
Mass | 2.83±0.13 [8] M☉ |
Luminosity | 94 [8] L☉ |
Temperature | 10,351 [8] K |
Rotational velocity (v sin i) | 35 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Lambda1 Sculptoris, Latinised from λ1 Sculptoris, is a double star system in the southern constellation of Sculptor. It is close to the lower limit of visibility to the naked eye, with a combined apparent visual magnitude of +6.05. [2] Based upon an annual parallax shift of 6.89 mas as measured from Earth, [1] it is located roughly 470 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.026 due to interstellar dust. [10]
The brighter star, component A, has a visual magnitude of 6.6, while the secondary, component B, is magnitude 7.0. [3] As of 2000, the pair had an angular separation of 0.737 arcsecond along a position angle of 14.0°. [3] Component A is a blue-white-hued B-type main-sequence star with a stellar classification of B9.5 V. [4] It has 2.8 times the mass of the Sun and radiates 94 times the solar luminosity from its photosphere at an effective temperature of 10,351 K. [8] The mass ratio is 0.609, meaning the secondary is only 60.9% as massive as the primary. [11]