Iota2 Muscae

For other stars with this Bayer designation, see ι Muscae.
Iota2 Muscae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Musca
Right ascension 13h 27m 18.49716s[1]
Declination −74° 41′ 30.3203″[1]
Apparent magnitude (V) 6.62[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9V[4]
B−V color index −0.056±0.004[2]
Astrometry
Radial velocity (Rv)−3.0±7.4[5] km/s
Proper motion (μ) RA: −35.337[1] mas/yr
Dec.: −13.814[1] mas/yr
Parallax (π)6.6274 ± 0.0366 mas[1]
Distance492 ± 3 ly
(150.9 ± 0.8 pc)
Absolute magnitude (MV)0.61[2]
Details
Mass2.8[6] M☉
Radius2.5[6] R☉
Luminosity71[6] L☉
Surface gravity (log g)4.09[6] cgs
Temperature10,641[6] K
Metallicity [Fe/H]−0.19[7] dex
Rotational velocity (v sin i)116[3] km/s
Other designations
ι2 Mus, CD−74°793, HD 116579, HIP 65628, HR 5051, SAO 257047[8]
Database references
SIMBADdata

ι2 Muscae, Latinised as Iota2 Muscae, is a blue-white-hued star in the southern constellation Musca, near the constellation's southern border with Chamaeleon. It has an apparent visual magnitude of 6.62,[2] which is just below the normal limit of stellar brightness visible to the naked eye. Based upon parallax measurements, it is located around 492 light-years (151 parsecs) from the Sun. It is a member of the Hyades Stream, but is not part of the Hyades or Praesepe open clusters.[9]

This is a B-type main-sequence star with a stellar classification of B9V. It has a high rate of spin, showing a projected rotational velocity of 116 km/s. The star has 2.8 times the mass of the Sun and is radiating 71 times the Sun's luminosity from its photosphere at an effective temperature of about 10,641 K.

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference ticv8 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference starhorse2 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggen1988 was invoked but never defined (see the help page).