HD 42540
Star in the constellation Pictor / From Wikipedia, the free encyclopedia
HD 42540, also known as HR 2196, is a giant star in the constellation Pictor. A class K2-3III orange giant, its apparent magnitude is 5.04 and it is approximately 389 light years away based on parallax.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pictor |
Right ascension | 06h 07m 03.40671s[1] |
Declination | −62° 09′ 16.4496″[1] |
Apparent magnitude (V) | 5.04[2] |
Characteristics | |
Spectral type | K2-3III[3] |
U−B color index | +1.35[4] |
B−V color index | +1.25[4] |
Variable type | suspected[5] |
Astrometry | |
Radial velocity (Rv) | +21.60[6] km/s |
Proper motion (μ) | RA: +15.513[1] mas/yr Dec.: −70.013[1] mas/yr |
Parallax (π) | 8.378 ± 0.0939 mas[1] |
Distance | 389 ± 4 ly (119 ± 1 pc) |
Absolute magnitude (MV) | −0.18[2] |
Details | |
Mass | 2.8[7] M☉ |
Radius | 27[7] R☉ |
Luminosity | 270[1] L☉ |
Temperature | 4,530[8] K |
Rotational velocity (v sin i) | 1.7[9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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This star was mistakenly catalogued as Mu Doradus (Mu Dor/μ Doradus/μ Dor) at incorrect coordinates, then assumed to be variable as no 5th-magnitude star was seen at that position. It also has the Gould designation 47 G. Pictoris.[10]