32 Pegasi is a binary star[10] system in the northern constellation of Pegasus. It is visible to the naked eye as a faint, blue-white hued point of light with an apparent visual magnitude of 4.81[2] The system is located approximately 560 light years away from the Sun based on parallax, and is drifting further away with a radial velocity of +11.4 km/s.[5]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pegasus |
Right ascension | 22h 21m 19.33896s[1] |
Declination | 28° 19′ 49.8786″[1] |
Apparent magnitude (V) | 4.81[2] (4.83 + 8.86)[3] |
Characteristics | |
Spectral type | B9III[4] |
U−B color index | −0.19[2] |
B−V color index | +0.00[2] |
Astrometry | |
Radial velocity (Rv) | +11.40[5] km/s |
Proper motion (μ) | RA: +17.426[1] mas/yr Dec.: +7.122[1] mas/yr |
Parallax (π) | 5.7814 ± 0.3196 mas[1] |
Distance | 560 ± 30 ly (173 ± 10 pc) |
Absolute magnitude (MV) | −1.82[6] |
Details | |
32 Peg Aa | |
Luminosity | 541[6] L☉ |
Temperature | 11,403[7] K |
Rotational velocity (v sin i) | 60[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
The brighter member of this system, designated component Aa, has visual magnitude 4.83 with a stellar classification of B9III,[4] matching a late B-type star with the luminosity class of a giant. It is spinning with a projected rotational velocity of 60 km/s,[8] and is radiating 541[6] times the luminosity of the Sun from its photosphere at an effective temperature of 11,403 K.[7]
The fainter secondary, component Ab, is of magnitude 8.86 with an angular separation of 0.50″ along a position angle of 288° from the primary, as of 2005. Visual companions include component B, at a 70.7″ separation from the primary and magnitude 10.73; C, at a separation from B of 3.2″ and magnitude 12.4; as well as D (separation from A of 42.8″ and magnitude 11.9) and E (separation from A of 58.3" and magnitude 11.9).[3]