  | |
| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 11h 48m 14.53282s[1] |
| Declination | −66° 48′ 53.6712″[1] |
| Apparent magnitude (V) | 4.6 - 4.8[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| U−Bcolor index | +1.89[4] |
| B−Vcolor index | +1.54[4] |
| Variable type | Lb[2] |
| Astrometry | |
| Radial velocity (Rv) | +37.4±2.8[5] km/s |
| Proper motion (μ) | RA: −31.223[1]mas/yr Dec.: −15.938[1]mas/yr |
| Parallax (π) | 7.2113±0.1762 mas[1] |
| Distance | 450 ± 10 ly (139 ± 3 pc) |
| Absolute magnitude (MV) | −0.85[6] |
| Details | |
| Radius | 52.92+1.01 −0.95[1] R☉ |
| Luminosity | 602.0±16.9[1] L☉ |
| Temperature | 3,930+36 −37[1] K |
| Other designations | |
| μ Mus,CD−66°1114,HD 102584,HIP 57581,HR 4530,SAO 251597[7] | |
| Database references | |
| SIMBAD | data |
Mu Muscae,Latinized from μ Muscae, is a solitary[8]star in the southernconstellation ofMusca. It is visible to thenaked eye as a faint, orange-hued star with anapparent visual magnitude of around 4.75.[4] Based upon an annualparallax shift of 7.21 mas as seen from Earth, it is located about 450 light years from theSun. The star is drifting further away with aradial velocity of +37 km/s.[5]
This is anevolvedK-typegiant star with astellar classification of K4 III,[3] having exhausted the supply of hydrogen at itscore then cooled and expanded to 53[1] times theSun's radius. It most likely on thered giant branch, rather than theasymptotic giant branch, and shows no signs of mass loss. Mu Muscae is a type Lb, oxygen-richirregular variable with a smallamplitude[9] that ranges in visual magnitude between 4.71 and 4.76.[10] It is radiating 602 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 3,930 K.[1]
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