| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Pictor |
| Right ascension | 06h 31m 58.31021s[1] |
| Declination | −58° 45′ 13.8117″[1] |
| Apparent magnitude (V) | 5.69[2](5.71 + 9.43)[3] |
| Characteristics | |
| Spectral type | B9 Ve[4] or B9 IVn + A8 V:p?[5] |
| U−Bcolor index | −0.17[2] |
| B−Vcolor index | −0.06[2] |
| Astrometry | |
| Radial velocity (Rv) | +0.40±1.00[6] km/s |
| Proper motion (μ) | RA: −1.34[1]mas/yr Dec.: +1.77[1]mas/yr |
| Parallax (π) | 4.31±0.38 mas[1] |
| Distance | 760 ± 70 ly (230 ± 20 pc) |
| Absolute magnitude (MV) | 0.20/3.75[7] |
| Details | |
| μ Pic A | |
| Mass | 3.60±0.09[8] M☉ |
| Luminosity | 355[8] L☉ |
| Temperature | 10,568[8] K |
| Rotational velocity (v sin i) | 228[8] km/s |
| Other designations | |
| μ Pic,CPD−58° 722,HD 46860,HIP 31137,HR 2412,SAO 234564[9] | |
| Database references | |
| SIMBAD | data |
μ Pictoris, Latinised asMu Pictoris, is abinary star[3] system in the southernconstellationPictor. It is bright enough to be dimly visible to the naked eye, having a combinedapparent visual magnitude of 5.69.[2] Based upon an annualparallax shift of 4.31 mas as seen from Earth,[1] the system is located roughly 760 light years distant from theSun. As of 2010, the pair have anangular separation of 2.46 arc seconds along aposition angle of 221°.[4]
The primary, designated component A, is a blue-white star with a visual magnitude of 5.71[3] and astellar classification of B9 Ve[4] or B9 IVn.[5] The first classification suggests is aB-type main-sequence star, with the 'e' suffix indicating aBe star. The second may instead indicate a somewhat moreevolvedB-type star that is spinning rapidly, resulting in "nebulous"absorption lines.Photometrically, it shows a pulsation period of 0.397 days, which is likely the same as the rotation period.[10]
The secondary companion, component B, is a white-hued star of magnitude 9.43[3] with a classification of A8 V:p?.[5] This indicates it is anA-type main-sequence star, with the 'p?' suffix suggesting it may bechemically peculiar while the ':' notation says there is some uncertainty about the general classification.
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