Mu Muscae

Mu Muscae
Observation data
Epoch J2000.0      Equinox J2000.0 (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−B color index +1.89[4]
B−V color 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]
Distance450 ± 10 ly
(139 ± 3 pc)
Absolute magnitude (MV)−0.85[6]
Details
Radius52.92+1.01
−0.95[1] R☉
Luminosity602.0±16.9[1] L☉
Temperature3,930+36
−37[1] K
Other designations
μ Mus, CD−66° 1114, HD 102584, HIP 57581, HR 4530, SAO 251597[7]
Database references
SIMBADdata

Mu Muscae, Latinized from μ Muscae, is a solitary[8] star in the southern constellation of Musca. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of around 4.75.[4] Based upon an annual parallax shift of 7.21 mas as seen from Earth, it is located about 450 light years from the Sun. The star is drifting further away with a radial velocity of +37 km/s.[5]

This is an evolved K-type giant star with a stellar classification of K4 III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded to 53[1] times the Sun's radius. It most likely on the red giant branch, rather than the asymptotic giant branch, and shows no signs of mass loss. Mu Muscae is a type Lb, oxygen-rich irregular variable with a small amplitude[9] that ranges in visual magnitude between 4.71 and 4.76.[10] It is radiating 602 times the luminosity of the Sun from its photosphere at an effective temperature of 3,930 K.[1]

  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Kerschbaum1999 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference AAVSOmu was invoked but never defined (see the help page).