Iota Reticuli

Iota Reticuli
Location of ι Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 04h 01m 18.15162s[1]
Declination −61° 04′ 43.7559″[1]
Apparent magnitude (V) +4.97[2]
Characteristics
Spectral type K4 III[3]
U−B color index +1.70[2]
B−V color index +1.42[2]
Astrometry
Radial velocity (Rv)+60.5±0.8[4] km/s
Proper motion (μ) RA: +66.79[1] mas/yr
Dec.: +94.80[1] mas/yr
Parallax (π)10.22 ± 0.16 mas[1]
Distance319 ± 5 ly
(98 ± 2 pc)
Absolute magnitude (MV)+0.02[5]
Details
Radius24.3+1.9
−4.7[6] R☉
Luminosity179.8±5.1[6] L☉
Temperature4290+261
−158[6] K
Other designations
ι Ret, CPD−61° 293, HD 25728, HIP 18772, HR 1266, SAO 248927[7]
Database references
SIMBADdata

ι Reticuli, Latinized as Iota Reticuli, is a solitary,[8] orange-hued star in the southern constellation of Reticulum. It is faintly visible to the naked eye, having a combined apparent visual magnitude of +4.97.[2] Based upon an annual parallax shift of 10.22 mas as seen from Earth,[1] it is located around 319 light years from the Sun. At present it is receding from the Sun with a radial velocity of +61 km/s,[4] having come closest to the Sun 883,000 years ago at a distance of 212 light years.[9] Iota Reticuli is moving through the Galaxy at a speed of 80.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 12,300 and 25,100 light years from the center of the Galaxy.[9]

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, the star cooled and expanded off the main sequence; at present it has 24[6] times the girth of the Sun. It is radiating 180[6] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,290 K.[6]

  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 d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference GaiaDR2 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. ^ a b Cite error: The named reference XHIP was invoked but never defined (see the help page).