Lambda Muscae

Lambda Muscae
Location of λ Muscae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Musca
Right ascension 11h 45m 36.41916s[1]
Declination −66° 43′ 43.5440″[1]
Apparent magnitude (V) +3.63[2]
Characteristics
Spectral type A7 V[3]
U−B color index +0.14[2]
B−V color index +0.16[2]
R−I color index 0.08
Astrometry
Radial velocity (Rv)+15.0±0.3[4] km/s
Proper motion (μ) RA: −100.35[1] mas/yr
Dec.: +33.49[1] mas/yr
Parallax (π)25.65 ± 0.34 mas[1]
Distance127 ± 2 ly
(39.0 ± 0.5 pc)
Absolute magnitude (MV)+1.07[5]
Details[6]
Aa
Mass2.28 M☉
Radius3.7 R☉
Luminosity40[7] L☉
Surface gravity (log g)3.87[8] cgs
Temperature7,700 K
Rotational velocity (v sin i)57.7±1.7[5] km/s
Age700 Myr
Ab
Mass0.43 M☉
C
Mass0.16 M☉
Other designations
λ Mus, CPD−66° 1640, FK5 442, GC 16131, HD 102249, HIP 57363, HR 4520, SAO 251575, CCDM J11456-6644A
Database references
SIMBADdata

Lambda Muscae, Latinized from λ Muscae, and often catalogued HD 102249 or HIP 57363, is a triple star system and the fourth-brightest star in the Southern Hemisphere constellation of Musca (the Fly). Lambda Muscae visibly makes up the far end of the tail of the visual Musca constellation. It is one of the stars catalogued in astronomer Johann Bayer's 1603 publications Uranometria.

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Waisberg was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference David2015 was invoked but never defined (see the help page).