Delta Reticuli

Delta Reticuli
Diagram showing star positions and boundaries of the Reticulum constellation and its surroundings
Location of δ Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 03h 58m 44.74945s[1]
Declination −61° 24′ 00.6673″[1]
Apparent magnitude (V) 4.60[2]
Characteristics
Evolutionary stage asymptotic giant branch[3]
Spectral type M2 III[4]
U−B color index +2.02[2]
B−V color index +1.61[2]
Variable type Suspected[5]
Astrometry
Radial velocity (Rv)−1.4±2.8[6] km/s
Proper motion (μ) RA: +9.80[1] mas/yr
Dec.: −14.30[1] mas/yr
Parallax (π)6.20 ± 0.25 mas[1]
Distance530 ± 20 ly
(161 ± 7 pc)
Absolute magnitude (MV)−1.47[7]
Details
Radius56[8] R☉
Luminosity1,100[9] L☉
Temperature3,891[9] K
Other designations
δ Ret, CPD−61 290, FK5 1110, HD 25422, HIP 18597, HR 1247, SAO 248918.[10]
Database references
SIMBADdata

Delta Reticuli (Delta Ret, δ Reticuli, δ Ret) is a star in the southern constellation of Reticulum. It is visible to the naked eye, having an apparent visual magnitude of 4.60.[2] The distance to this star, as estimated from its annual parallax shift of 6.20 mas,[1] is roughly 530 light-years from the Sun.

This is an evolved red giant star on the asymptotic giant branch,[3] having a stellar classification of M2 III.[4] It has expanded to around 56[8] times the radius of the Sun and radiates 1,100 times the solar luminosity from its cool outer atmosphere at an effective temperature of 3,891 K.[9]

Delta Reticuli is moving through the Milky Way at a speed of 13.3 km/s relative to the Sun. Its projected galactic orbit carries it between 22,700 and 30,400 light-years from the center of the galaxy.[11]

  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 ibsh8_30 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference eggen1992 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference samus2004 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference cadars was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ "Delta Reticuli (HIP 18597)". Archived from the original on 2014-04-14. Retrieved 2012-08-17.