Epsilon Reticuli

Epsilon Reticuli
Location of ε Reticuli (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Reticulum
Right ascension 4h 16m 29.028s[1]
Declination –59° 18′ 07.76″[1]
Apparent magnitude (V) 4.44[2] / 12.5
Characteristics
Spectral type K2 III-IV + DA3.3[3]
U−B color index +1.07[2]
B−V color index +1.08[2]
Astrometry
Radial velocity (Rv)+29.3[4] km/s
Proper motion (μ) RA: −47.785 mas/yr[1]
Dec.: −167.806 mas/yr[1]
Parallax (π)54.2286 ± 0.1019 mas[1]
Distance60.1 ± 0.1 ly
(18.44 ± 0.03 pc)
Absolute magnitude (MV)0.87[5]
Details
ε Reticuli A
Mass1.46±0.01[6] M☉
Radius3.18±0.08[6] R☉
Luminosity6.2±0.6[6] L☉
Surface gravity (log g)3.76±0.05[6] cgs
Temperature4,961±28[6] K
Metallicity [Fe/H]0.26±0.07[6] dex
Rotational velocity (v sin i)2.07±0.42[6] km/s
Age2.89±0.06[6] Gyr
ε Reticuli B
Mass0.60±0.02[3] M☉
Radius0.0132±0.0002[3] R☉
Surface gravity (log g)7.98±0.02[3] cgs
Temperature15,310±350[3] K
Age1.5[3] Gyr
Other designations
JSP 56, CCDM J04165-5918AB, WDS J04165-5918AB[7]
Epsilon Reticuli A: ε Ret, CPD−59°324, GJ 9153, HD 27442, HIP 19921, HR 1355, WDS J04165-5918A[8]
Epsilon Reticuli B: ε Reticuli B, CPD−59°324B, HD 27442B, WDS J04165-5918B, WD 0415-594[9]
Database references
SIMBADdata

Epsilon Reticuli, Latinized from ε Reticuli, is a double star approximately 60 light-years away in the southern constellation of Reticulum. The brighter member is visible to the naked eye with an apparent visual magnitude of 4.44. The primary component is an orange subgiant, while the secondary is a white dwarf. The two stars share a common motion through space and hence most likely form a binary star system.[10] The brighter star should be easily visible without optical aid under dark skies in the southern hemisphere. In 2000, an extrasolar planet was confirmed to be orbiting the primary star in the system.

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Farihi2011 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference aaa343_222 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h Cite error: The named reference Jofré2015 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 Simbad for A was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Simbad for B was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Chauvin2007 was invoked but never defined (see the help page).