Zeta1 Muscae

For other star systems with this Bayer designation see ζ Muscae
Zeta1 Muscae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Musca
Right ascension 12h 22m 12.04737s[1]
Declination −68° 18′ 26.3733″[1]
Apparent magnitude (V) 5.73[2]
Characteristics
Spectral type K0III[3]
B−V color index +1.038±0.004[2]
Astrometry
Radial velocity (Rv)+21.13±0.40[2] km/s
Proper motion (μ) RA: −8.017[1] mas/yr
Dec.: −49.773[1] mas/yr
Parallax (π)7.8246 ± 0.1781 mas[1]
Distance417 ± 9 ly
(128 ± 3 pc)
Absolute magnitude (MV)0.73[2]
Details
Radius14.73+0.39
−0.52[1] R☉
Luminosity98.5±2.6[1] L☉
Temperature4,737+86
−61[1] K
Other designations
ζ1 Mus, CPD−67°1939, HD 107567, HIP 60329, HR 4704, SAO 251868[4]
Database references
SIMBADdata

Zeta1 Muscae, Latinized from ζ1 Muscae and abbreviated ζ1 Mus, is a suspected astrometric binary[5] star system in the constellation Musca, located 2.6° west of Beta Muscae.[6] It is bright enough to be visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.73,[2] forming a visual pair with nearby Zeta2 Muscae.[6] The ζ1 Mus system is around 417 light-years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +21 km/s.[2]

The suspected astrometric component of the ζ1 Mus system was identified from acceleration behavior in the proper motion of the main star.[7] The visible component is an aging giant star with a stellar classification of K0III;[4] a star that has used up its core hydrogen and is cooling and expanding. It now has 15[1] times the girth of the Sun and is radiating 98.5[1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,737 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Streicher2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Makarov2005 was invoked but never defined (see the help page).