Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 18h 31m 22.42509s [1] |
Declination | â62° 16′ 41.8853″ [1] |
Apparent magnitude (V) | 4.64 (4.60 - 4.64 [2]) |
Characteristics | |
Evolutionary stage | main sequence [3] |
Spectral type | B7III [4] |
UâB color index | â0.39 [5] |
BâV color index | â0.11 [5] |
Variable type | SPB [2] |
Astrometry | |
Radial velocity (Rv) | +16.95 [6] km/s |
Proper motion (Ό) |
RA: â1.11
[1]
mas/
yr Dec.: â45.31 [1] mas/ yr |
Parallax (Ï) | 7.43 ± 0.24 mas [1] |
Distance | 440 ± 10
ly (135 ± 4 pc) |
Absolute magnitude (MV) | -1.01 [4] |
Orbit [7] | |
Period (P) | 1.711529±0.000005 d |
Eccentricity (e) | 0.0 |
Periastron epoch (T) | 2,450,276.5502±0.0007 HJD |
Argument of periastron (Ï) (secondary) | 127±12° |
Semi-amplitude (K1) (primary) | 43.8±0.1 km/s |
Details | |
Mass | 4.39 [8] M☉ |
Luminosity | 659 [8] L☉ |
Temperature | 12,764 [8] K |
Rotational velocity (v sin i) | 125.0 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Pavonis is a possible triple star system [11] in the southern constellation of Pavo. It is visible to the naked eye as a faint star that varies in apparent visual magnitude from 4.60 to 4.64 over a period of 0.85584 days. [2] The system lies approximately 440 light years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +17 km/s. [6] It is a possible member of the Wolf 630 group of co-moving stars. [3]
This is a single-lined spectroscopic binary system with an orbital period of just 1.71 days in a circular orbit. [7] The unresolved [3] components are close enough that their tidal interaction is significant. [7] The visible component is a slowly pulsating B-type star with a stellar classification of B7III. [4] This implies it is an evolved giant star, but it is actually more likely to be on the main sequence. An X-ray emission has been detected from the pair. [3]
The third component is a visible companion, probably a pre-main-sequence star, at magnitude 13.7 and separation 3.1 âł. This star is estimated at 0.15 solar masses and an effective temperature of 3,192 K. [8] It too is an X-ray source. [3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 18h 31m 22.42509s [1] |
Declination | â62° 16′ 41.8853″ [1] |
Apparent magnitude (V) | 4.64 (4.60 - 4.64 [2]) |
Characteristics | |
Evolutionary stage | main sequence [3] |
Spectral type | B7III [4] |
UâB color index | â0.39 [5] |
BâV color index | â0.11 [5] |
Variable type | SPB [2] |
Astrometry | |
Radial velocity (Rv) | +16.95 [6] km/s |
Proper motion (Ό) |
RA: â1.11
[1]
mas/
yr Dec.: â45.31 [1] mas/ yr |
Parallax (Ï) | 7.43 ± 0.24 mas [1] |
Distance | 440 ± 10
ly (135 ± 4 pc) |
Absolute magnitude (MV) | -1.01 [4] |
Orbit [7] | |
Period (P) | 1.711529±0.000005 d |
Eccentricity (e) | 0.0 |
Periastron epoch (T) | 2,450,276.5502±0.0007 HJD |
Argument of periastron (Ï) (secondary) | 127±12° |
Semi-amplitude (K1) (primary) | 43.8±0.1 km/s |
Details | |
Mass | 4.39 [8] M☉ |
Luminosity | 659 [8] L☉ |
Temperature | 12,764 [8] K |
Rotational velocity (v sin i) | 125.0 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Pavonis is a possible triple star system [11] in the southern constellation of Pavo. It is visible to the naked eye as a faint star that varies in apparent visual magnitude from 4.60 to 4.64 over a period of 0.85584 days. [2] The system lies approximately 440 light years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +17 km/s. [6] It is a possible member of the Wolf 630 group of co-moving stars. [3]
This is a single-lined spectroscopic binary system with an orbital period of just 1.71 days in a circular orbit. [7] The unresolved [3] components are close enough that their tidal interaction is significant. [7] The visible component is a slowly pulsating B-type star with a stellar classification of B7III. [4] This implies it is an evolved giant star, but it is actually more likely to be on the main sequence. An X-ray emission has been detected from the pair. [3]
The third component is a visible companion, probably a pre-main-sequence star, at magnitude 13.7 and separation 3.1 âł. This star is estimated at 0.15 solar masses and an effective temperature of 3,192 K. [8] It too is an X-ray source. [3]