HD 111597
Star in the constellation Centaurus
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HD 111597 is a suspected astrometric binary[9] star system in the southern constellation of Centaurus. It has the Bayer designation p Centauri, while HD 111597 is the star's identifier from the Henry Draper catalogue. The system is visible to the naked eye as a faint point of light with an apparent visual magnitude of 4.90.[1] It is located at a distance of approximately 410 light years from the Sun based on parallax,[2] and has an absolute magnitude of −0.53.[1] The system is a probable member of the Sco OB2 association of co-moving stars.[10] The visible component is a B-type main-sequence star with a stellar classification of B9V.[3]
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 50m 41.16339s[2] |
| Declination | −33° 59′ 57.6527″[2] |
| Apparent magnitude (V) | 4.90[1] |
| Characteristics | |
| Spectral type | B9V[3] |
| B−V color index | −0.031±0.002[1] |
| Astrometry | |
| Radial velocity (Rv) | +4.00±4.20[1] km/s |
| Proper motion (μ) | RA: −29.710[2] mas/yr Dec.: −13.778[2] mas/yr |
| Parallax (π) | 7.9731±0.2191 mas[2] |
| Distance | 410 ± 10 ly (125 ± 3 pc) |
| Absolute magnitude (MV) | −0.53[1] |
| Details | |
| primary | |
| Mass | 4.3[4] M☉ |
| Radius | 4.3[5] R☉ |
| Luminosity | 169[5] L☉ |
| Surface gravity (log g) | 3.58[5] cgs |
| Temperature | 10,043[5] K |
| Rotational velocity (v sin i) | 230[6] km/s |
| Age | 321[7] Myr |
| secondary | |
| Mass | 0.35[4] M☉ |
| Other designations | |
| p Cen, CD−33°8653, FK5 1331, HD 111597, HIP 62683, HR 4874, SAO 203863, CCDM J12507-3400, WDS J12507-3400A[8] | |
| Database references | |
| SIMBAD | data |