Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Orion |
Right ascension | 06h 07m 34.32588s [1] |
Declination | +14° 46′ 06.5061″ [1] |
Apparent magnitude (V) | 4.42 [2] |
Characteristics | |
Spectral type | B3 V [3] or B3 IV [4] |
U−B color index | −0.67 [2] |
B−V color index | −0.18 [2] |
Astrometry | |
Radial velocity (Rv) | +24.1 [5] km/s |
Proper motion (μ) |
RA: +6.78
[1]
mas/
yr Dec.: −20.23 [1] mas/ yr |
Parallax (π) | 6.32 ± 0.33 mas [1] |
Distance | 520 ± 30
ly (158 ± 8 pc) |
Orbit [6] | |
Period (P) | 131.211 d |
Eccentricity (e) | 0.64 |
Periastron epoch (T) | 2436475.852 JD |
Argument of periastron (ω) (secondary) | 6.6° |
Semi-amplitude (K1) (primary) | 33.3 km/s |
Details | |
ν Ori A | |
Mass | 6.7±0.1 [4] M☉ |
Radius | 4.3 [7] R☉ |
Luminosity | 1,965 [3] L☉ |
Surface gravity (log g) | 4.06 [8] cgs |
Temperature | 17,880 [8] K |
Metallicity [Fe/H] | −0.05 [8] dex |
Rotational velocity (v sin i) | 30 [9] km/s |
Age | 26.3±5.3 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Nu Orionis (ν Orionis) is a binary star [11] system in the northeastern part of the constellation Orion. It should not be confused with the variable star NU Orionis. [12] Nu Orionis has an apparent visual magnitude of 4.42, [2] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 0.00632 arcseconds, [1] the distance to this system is roughly 520 light years.
This is a single-lined spectroscopic binary system, [9] which means that only the absorption line features of one of the components can be distinguished. The components orbit each other with a period of 131.2 days and an eccentricity of 0.64. [6] Depending on the source, the primary is either a B-type main sequence star with a stellar classification of B3 V, [3] or a more evolved B-type subgiant star of class B3 IV. [4] It has an angular diameter of 0.251 mas, [13] which, at the estimated distance of this system, yields a physical size of about 4.3 times the radius of the Sun. [7] The mass is 6.7 [4] times that of the Sun and it shines with 1,965 [3] times the solar luminosity from its outer atmosphere at an effective temperature of 17,880 K. [8]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Orion |
Right ascension | 06h 07m 34.32588s [1] |
Declination | +14° 46′ 06.5061″ [1] |
Apparent magnitude (V) | 4.42 [2] |
Characteristics | |
Spectral type | B3 V [3] or B3 IV [4] |
U−B color index | −0.67 [2] |
B−V color index | −0.18 [2] |
Astrometry | |
Radial velocity (Rv) | +24.1 [5] km/s |
Proper motion (μ) |
RA: +6.78
[1]
mas/
yr Dec.: −20.23 [1] mas/ yr |
Parallax (π) | 6.32 ± 0.33 mas [1] |
Distance | 520 ± 30
ly (158 ± 8 pc) |
Orbit [6] | |
Period (P) | 131.211 d |
Eccentricity (e) | 0.64 |
Periastron epoch (T) | 2436475.852 JD |
Argument of periastron (ω) (secondary) | 6.6° |
Semi-amplitude (K1) (primary) | 33.3 km/s |
Details | |
ν Ori A | |
Mass | 6.7±0.1 [4] M☉ |
Radius | 4.3 [7] R☉ |
Luminosity | 1,965 [3] L☉ |
Surface gravity (log g) | 4.06 [8] cgs |
Temperature | 17,880 [8] K |
Metallicity [Fe/H] | −0.05 [8] dex |
Rotational velocity (v sin i) | 30 [9] km/s |
Age | 26.3±5.3 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Nu Orionis (ν Orionis) is a binary star [11] system in the northeastern part of the constellation Orion. It should not be confused with the variable star NU Orionis. [12] Nu Orionis has an apparent visual magnitude of 4.42, [2] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 0.00632 arcseconds, [1] the distance to this system is roughly 520 light years.
This is a single-lined spectroscopic binary system, [9] which means that only the absorption line features of one of the components can be distinguished. The components orbit each other with a period of 131.2 days and an eccentricity of 0.64. [6] Depending on the source, the primary is either a B-type main sequence star with a stellar classification of B3 V, [3] or a more evolved B-type subgiant star of class B3 IV. [4] It has an angular diameter of 0.251 mas, [13] which, at the estimated distance of this system, yields a physical size of about 4.3 times the radius of the Sun. [7] The mass is 6.7 [4] times that of the Sun and it shines with 1,965 [3] times the solar luminosity from its outer atmosphere at an effective temperature of 17,880 K. [8]