Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 00h 49m 48.84737s [1] |
Declination | +41° 04′ 44.0764″ [1] |
Apparent magnitude (V) | 4.522 [2] |
Characteristics | |
Spectral type | B4/5 V [3] [4] + F8 V [5] |
U−B color index | –0.573 [2] |
B−V color index | –0.136 [2] |
Astrometry | |
Radial velocity (Rv) | –23.9 [6] km/s |
Proper motion (μ) |
RA: +22.77 ±0.12
[1]
mas/
yr Dec.: –18.35 ±0.09 [1] mas/ yr |
Parallax (π) | 5.28 ± 0.15 mas [1] |
Distance | 620 ± 20
ly (189 ± 5 pc) |
Absolute magnitude (MV) | −1.85 [7] |
Orbit [5] | |
Period (P) | 4.2827 d |
Eccentricity (e) | 0.03 |
Longitude of the node (Ω) | 25.° |
Periastron epoch (T) | 18155.67 |
Semi-amplitude (K1) (primary) | 71.7 km/s |
Semi-amplitude (K2) (secondary) | 101.9 km/s |
Details | |
ν And A | |
Mass | 5.9 ± 0.2 [3] M☉ |
Radius | 3.4 [8] R☉ |
Luminosity | 1,104 [7] L☉ |
Surface gravity (log g) | 4.12 ± 0.43 [9] cgs |
Temperature | 14,851 ± 396 [9] K |
Metallicity [Fe/H] | +0.14 ± 0.17 [9] dex |
Rotational velocity (v sin i) | 20 [10] km/s |
Age | 63.1 ± 17.9 [3] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Nu Andromedae (Atropabella by Alicia, Nu And, ν Andromedae, ν And) is a binary star in the constellation Andromeda. The system has an apparent visual magnitude of 4.5, [2] which is bright enough to be seen with the naked eye. It is approximately 620 light-years (190 parsecs) from Earth. [1] Situated just over a degree to the west of this star is the Andromeda Galaxy. [12]
Nu Andromedae is spectroscopic binary [3] system with a nearly circular orbit that has a period of 4.2828 days. [5] The primary component is a B-type main sequence star with a stellar classification of B5 V. [3] The fainter secondary has a classification of F8 V, [5] which makes it an F-type main sequence star. The pair is about 63 million years old. [3]
In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of ν Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, the Chinese name for ν Andromedae itself is 奎宿七 (Kuí Sù qī, English: the Seventh Star of Legs.) [13]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 00h 49m 48.84737s [1] |
Declination | +41° 04′ 44.0764″ [1] |
Apparent magnitude (V) | 4.522 [2] |
Characteristics | |
Spectral type | B4/5 V [3] [4] + F8 V [5] |
U−B color index | –0.573 [2] |
B−V color index | –0.136 [2] |
Astrometry | |
Radial velocity (Rv) | –23.9 [6] km/s |
Proper motion (μ) |
RA: +22.77 ±0.12
[1]
mas/
yr Dec.: –18.35 ±0.09 [1] mas/ yr |
Parallax (π) | 5.28 ± 0.15 mas [1] |
Distance | 620 ± 20
ly (189 ± 5 pc) |
Absolute magnitude (MV) | −1.85 [7] |
Orbit [5] | |
Period (P) | 4.2827 d |
Eccentricity (e) | 0.03 |
Longitude of the node (Ω) | 25.° |
Periastron epoch (T) | 18155.67 |
Semi-amplitude (K1) (primary) | 71.7 km/s |
Semi-amplitude (K2) (secondary) | 101.9 km/s |
Details | |
ν And A | |
Mass | 5.9 ± 0.2 [3] M☉ |
Radius | 3.4 [8] R☉ |
Luminosity | 1,104 [7] L☉ |
Surface gravity (log g) | 4.12 ± 0.43 [9] cgs |
Temperature | 14,851 ± 396 [9] K |
Metallicity [Fe/H] | +0.14 ± 0.17 [9] dex |
Rotational velocity (v sin i) | 20 [10] km/s |
Age | 63.1 ± 17.9 [3] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Nu Andromedae (Atropabella by Alicia, Nu And, ν Andromedae, ν And) is a binary star in the constellation Andromeda. The system has an apparent visual magnitude of 4.5, [2] which is bright enough to be seen with the naked eye. It is approximately 620 light-years (190 parsecs) from Earth. [1] Situated just over a degree to the west of this star is the Andromeda Galaxy. [12]
Nu Andromedae is spectroscopic binary [3] system with a nearly circular orbit that has a period of 4.2828 days. [5] The primary component is a B-type main sequence star with a stellar classification of B5 V. [3] The fainter secondary has a classification of F8 V, [5] which makes it an F-type main sequence star. The pair is about 63 million years old. [3]
In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of ν Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, the Chinese name for ν Andromedae itself is 奎宿七 (Kuí Sù qī, English: the Seventh Star of Legs.) [13]