Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 18h 23m 13.64610s [1] |
Declination | −61° 29′ 37.9364″ [1] |
Apparent magnitude (V) | 4.35 [2] |
Characteristics | |
Spectral type | K4III [3] |
U−B color index | +1.55 [4] |
B−V color index | +1.46 [2] |
Astrometry | |
Radial velocity (Rv) | +12.2±0.9 [5] km/s |
Proper motion (μ) |
RA: −5.985
[1]
mas/
yr Dec.: −0.538 [1] mas/ yr |
Parallax (π) | 7.3600 ± 0.3753 mas [1] |
Distance | 440 ± 20
ly (136 ± 7 pc) |
Absolute magnitude (MV) | −1.16 [2] |
Orbit [6] | |
Period (P) | 2,214 d |
Eccentricity (e) | 0.26 |
Periastron epoch (T) | 2,418,076.2 JD |
Argument of periastron (ω) (secondary) | 187.2° |
Semi-amplitude (K1) (primary) | 17.9 km/s |
Details | |
Radius | 54.82+0.32 −3.92 [1] R☉ |
Luminosity | 729±42 [1] L☉ |
Temperature | 4,051+153 −117 [1] K |
Other designations | |
Database references | |
SIMBAD | data |
ξ Pavonis, Latinised as Xi Pavonis, is a triple star [8] system in the southern constellation of Pavo. It is visible to the naked eye as a faint star with a combined apparent visual magnitude of 4.35 [2] The system is located approximately 440 light-years from the Sun based on parallax, [1] and it is drifting further away with a radial velocity of +12 km/s. [5]
This system forms the double star GLE 2, whose companion's magnitude is 8.6 with a 3.3 ″ angular separation, which was discovered by Australian amateur astronomer Walter Gale [9] in 1894. The primary component is itself a single-lined spectroscopic binary [10] [11] with an orbital period of 6.06 years and an eccentricity of 0.26. [6] The visible member of this inner pair is an aging giant star with a stellar classification of K4III. [2]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 18h 23m 13.64610s [1] |
Declination | −61° 29′ 37.9364″ [1] |
Apparent magnitude (V) | 4.35 [2] |
Characteristics | |
Spectral type | K4III [3] |
U−B color index | +1.55 [4] |
B−V color index | +1.46 [2] |
Astrometry | |
Radial velocity (Rv) | +12.2±0.9 [5] km/s |
Proper motion (μ) |
RA: −5.985
[1]
mas/
yr Dec.: −0.538 [1] mas/ yr |
Parallax (π) | 7.3600 ± 0.3753 mas [1] |
Distance | 440 ± 20
ly (136 ± 7 pc) |
Absolute magnitude (MV) | −1.16 [2] |
Orbit [6] | |
Period (P) | 2,214 d |
Eccentricity (e) | 0.26 |
Periastron epoch (T) | 2,418,076.2 JD |
Argument of periastron (ω) (secondary) | 187.2° |
Semi-amplitude (K1) (primary) | 17.9 km/s |
Details | |
Radius | 54.82+0.32 −3.92 [1] R☉ |
Luminosity | 729±42 [1] L☉ |
Temperature | 4,051+153 −117 [1] K |
Other designations | |
Database references | |
SIMBAD | data |
ξ Pavonis, Latinised as Xi Pavonis, is a triple star [8] system in the southern constellation of Pavo. It is visible to the naked eye as a faint star with a combined apparent visual magnitude of 4.35 [2] The system is located approximately 440 light-years from the Sun based on parallax, [1] and it is drifting further away with a radial velocity of +12 km/s. [5]
This system forms the double star GLE 2, whose companion's magnitude is 8.6 with a 3.3 ″ angular separation, which was discovered by Australian amateur astronomer Walter Gale [9] in 1894. The primary component is itself a single-lined spectroscopic binary [10] [11] with an orbital period of 6.06 years and an eccentricity of 0.26. [6] The visible member of this inner pair is an aging giant star with a stellar classification of K4III. [2]