Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Sagittarius |
Right ascension | 18h 54m 10.17695s[1] |
Declination | −22° 44′ 41.4247″[1] |
Apparent magnitude (V) | +4.86[2] |
Characteristics | |
Spectral type | G2/K1 Ib/II + B9.2p[3] |
U−B color index | +1.34[2] |
B−V color index | +1.43[2] |
Astrometry | |
Radial velocity (Rv) | −11.57[4] km/s |
Proper motion (μ) | RA: +4.291[4] mas/yr Dec.: −7.786[4] mas/yr |
Parallax (π) | 2.3170 ± 0.2139 mas[4] |
Distance | 1,400 ± 100 ly (430 ± 40 pc) |
Absolute magnitude (MV) | −3.91[5] |
Details | |
Radius | 101[4] R☉ |
Luminosity | 3,464[4] L☉ |
Temperature | 4,401[4] K |
Other designations | |
Database references | |
SIMBAD | data |
Nu1 Sagittarii (ν1 Sagittarii, abbreviated Nu1 Sgr, ν1 Sgr) is a triple star system[7] about 1,100 light-years from Earth. Its three components are designated Nu1 Sagittarii A (officially named Ainalrami /ɛnəlˈreɪmi/, the traditional name for the system),[8] B and C.[9] A and B themselves form a spectroscopic binary.[7] The system is 0.11 degree north of the ecliptic.
vanLeeuwen2007
was invoked but never defined (see the help page).Lutz1977
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was invoked but never defined (see the help page).Cardini2005
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was invoked but never defined (see the help page).Eggleton2008
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