Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lepus |
Right ascension | 05h 19m 59.02275s [1] |
Declination | −12° 18′ 56.1139″ [1] |
Apparent magnitude (V) | 5.29 [2] |
Characteristics | |
Spectral type | B7/8 V [3] or B7 IVnn [4] |
U−B color index | −0.41 [2] |
B−V color index | −0.12 [2] |
Astrometry | |
Radial velocity (Rv) | +16.0±7.4 [5] km/s |
Proper motion (μ) |
RA: −13.32
[1]
mas/
yr Dec.: +7.18 [1] mas/ yr |
Parallax (π) | 9.78 ± 0.37 mas [1] |
Distance | 330 ± 10
ly (102 ± 4 pc) |
Absolute magnitude (MV) | +0.25 [6] |
Details | |
Mass | 3.28±0.05 [7] M☉ |
Radius | 3.0 [8] R☉ |
Luminosity | 138 [7] L☉ |
Temperature | 12,417 [7] K |
Rotational velocity (v sin i) | 285 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Leporis, Latinized from ν Leporis, is a probable astrometric binary [11] star system in the constellation Lepus. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.29. [2] Based upon an annual parallax shift of 7.70 mas as seen from the Earth, [1] it is 420 light years from the Sun.
The visible component is a B-type star with an estimated 3.3 [7] times the mass of the Sun. Lesh (1968) gave a stellar classification of B7 IVnn, [4] which would indicate this is a somewhat evolved subgiant star. The 'nn' notation indicates especially "nebulous" absorption lines caused by rapid rotation. Houk and Smith-Moore (1978) listed it as B7/8 V, [3] suggesting this is instead a B-type main sequence star that has not yet consumed all the hydrogen at its core.
Nu Leporis is spinning rapidly with a projected rotational velocity of 285 km/s. [9] The star has a radius about three [8] times that of the Sun and is radiating 138 times the Sun's luminosity from its photosphere at an effective temperature of 12,417 K. [7]
{{
cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lepus |
Right ascension | 05h 19m 59.02275s [1] |
Declination | −12° 18′ 56.1139″ [1] |
Apparent magnitude (V) | 5.29 [2] |
Characteristics | |
Spectral type | B7/8 V [3] or B7 IVnn [4] |
U−B color index | −0.41 [2] |
B−V color index | −0.12 [2] |
Astrometry | |
Radial velocity (Rv) | +16.0±7.4 [5] km/s |
Proper motion (μ) |
RA: −13.32
[1]
mas/
yr Dec.: +7.18 [1] mas/ yr |
Parallax (π) | 9.78 ± 0.37 mas [1] |
Distance | 330 ± 10
ly (102 ± 4 pc) |
Absolute magnitude (MV) | +0.25 [6] |
Details | |
Mass | 3.28±0.05 [7] M☉ |
Radius | 3.0 [8] R☉ |
Luminosity | 138 [7] L☉ |
Temperature | 12,417 [7] K |
Rotational velocity (v sin i) | 285 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Leporis, Latinized from ν Leporis, is a probable astrometric binary [11] star system in the constellation Lepus. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.29. [2] Based upon an annual parallax shift of 7.70 mas as seen from the Earth, [1] it is 420 light years from the Sun.
The visible component is a B-type star with an estimated 3.3 [7] times the mass of the Sun. Lesh (1968) gave a stellar classification of B7 IVnn, [4] which would indicate this is a somewhat evolved subgiant star. The 'nn' notation indicates especially "nebulous" absorption lines caused by rapid rotation. Houk and Smith-Moore (1978) listed it as B7/8 V, [3] suggesting this is instead a B-type main sequence star that has not yet consumed all the hydrogen at its core.
Nu Leporis is spinning rapidly with a projected rotational velocity of 285 km/s. [9] The star has a radius about three [8] times that of the Sun and is radiating 138 times the Sun's luminosity from its photosphere at an effective temperature of 12,417 K. [7]
{{
cite web}}
: CS1 maint: postscript (
link)