Nu Capricorni
Binary star in the constellation Capricornus / From Wikipedia, the free encyclopedia
Nu Capricorni or ν Capricorni is a binary star[4] system in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.76.[2]
Quick Facts Constellation, Right ascension ...
Location of ν Capricorni (circled), to the ESE of the naked eye double, α Capricorni | |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Capricornus |
Right ascension | 20h 20m 39.81562s[1] |
Declination | −12° 45′ 32.6844″[1] |
Apparent magnitude (V) | +4.76[2] |
Characteristics | |
Spectral type | B9 IV[3] or B9.5 V[4] |
U−B color index | −0.11[2] |
B−V color index | −0.04[2] |
Astrometry | |
Radial velocity (Rv) | −1.00[5] km/s |
Proper motion (μ) | RA: +14.74[1] mas/yr Dec.: −14.32[1] mas/yr |
Parallax (π) | 12.88 ± 0.27 mas[1] |
Distance | 253 ± 5 ly (78 ± 2 pc) |
Absolute magnitude (MV) | +0.32[6] |
Details | |
ν Cap A | |
Mass | 2.37[7] M☉ |
Luminosity | 87[6] L☉ |
Surface gravity (log g) | 3.97[7] cgs |
Temperature | 10,461±356[7] K |
Metallicity [Fe/H] | −0.15±0.04[6] dex |
Rotational velocity (v sin i) | 24[8] km/s |
Age | 115[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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