Iota Crateris

ι Crateris
Location of ι Crateris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Crater
Right ascension 11h 38m 40.01668s[1]
Declination −13° 12′ 06.9963″[1]
Apparent magnitude (V) 5.48[2]
Characteristics
Spectral type F6.5 V[3]
B−V color index +0.52[2]
Astrometry
Radial velocity (Rv)−26.6±0.3[4] km/s
Proper motion (μ) RA: +99.52[1] mas/yr
Dec.: +125.99[1] mas/yr
Parallax (π)37.41 ± 0.30 mas[1]
Distance87.2 ± 0.7 ly
(26.7 ± 0.2 pc)
Absolute magnitude (MV)+3.33[5]
Details
ι Crt A
Mass1.19+0.06
−0.02[6] M☉
Surface gravity (log g)4.27±0.03[7] cgs
Temperature6,230±21[7] K
Metallicity [Fe/H]−0.15±0.01[7] dex
Age4.45+0.32
−0.94[6] Gyr
ι Crt B
Mass0.57[8] M☉
Other designations
ι Crt, 24 Crateris, BD−12° 3466, GJ 3677, HD 101198, HIP 56802, HR 4488, SAO 156802.[9]
Database references
SIMBADdata

Iota Crateris (ι Crateris) is the Bayer designation for a binary star[10] system in the southern constellation of Crater. It is faintly visible to the naked eye with an apparent visual magnitude of 5.48.[2] According to the Bortle scale, this means it can be viewed from suburban skies at night. Based upon an annual parallax shift of 37.41 mas,[1] Iota Crateris is located 87 light years from the Sun.

This is an astrometric binary system with an estimated orbital period of roughly 79,000 years.[10] The primary, component A, is an F-type main sequence star with a stellar classification of F6.5 V,[3] which is generating energy through the thermonuclear fusion of hydrogen in its core region. It is around 4.45[6] billion years old with 1.19[6] times the mass of the Sun. The star is radiating energy from its outer atmosphere at an effective temperature of 6,230 K.[7]

The companion, component B, is a red dwarf star with a probable classification of M3, although its mass estimate of 0.57 solar would be more consistent with an M0 class star.[8] As of 2014, this magnitude 11.0 star had an angular separation of 1.10 arc seconds along a position angle of 248°.[11] It has a projected separation of 25 AU,[8] which means it is positioned at least this distance away from the primary.

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  3. ^ a b 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. ^ Cite error: The named reference Lambert2004 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Ramirez2012 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Adibekyan2016 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Ehrenreich2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Tokovinin2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Mason2014 was invoked but never defined (see the help page).