Alpha Reticuli

α Reticuli
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 04h 14m 25.4837s[1]
Declination −62° 28′ 25.889″[1]
Apparent magnitude (V) 3.343[1]
Characteristics
Spectral type G8II-III[1]
U−B color index +0.63[2]
B−V color index +0.91[2]
R−I color index +0.44[2]
Astrometry
Radial velocity (Rv) 35.5 ± 0.9[1] km/s
Proper motion (μ) RA: 41.64[1] mas/yr
Dec.: 49.72[1] mas/yr
Parallax (π) 19.98 ± 0.45[1] mas
Distance 163 ± 4 ly
(50 ± 1 pc)
Absolute magnitude (MV) −0.15[3]
Details
Mass 3.5[4] M
Radius 21[4] R
Luminosity 240[4] L
Temperature 4940[4] K
Other designations
α Ret, Alpha Reticuli, Alpha Ret, HJ 3638A, CCDM J04144-6228A, CPD−62 332, FK5 156, GC 5164, HD 27256, HIP 19780, HR 1336, IDS 04131-6243 A, PPM 353975, SAO 248969, WDS 04144-6228A.[1][5]
Database references
SIMBAD data

Alpha Reticuli (Alpha Ret, α Reticuli, α Ret) is a G-type bright giant star. It is the brightest star in the constellation of Reticulum and has an apparent visual magnitude of approximately 3.343.[1][4]

Visual companion

CCDM J04144-6228B
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 04h 14m 24.4s[6]
Declination −62° 27′ 39″[6]
Apparent magnitude (V) 12.0[6]
Characteristics
Spectral type M0V[4]
Position (relative to α Reticuli)
Epoch of observation 1998
Angular distance 48.5 [5]
Position angle 355° [5]
Other designations
HJ 3638B, CPD−62 332B, IDS 04131-6243 B, WDS 04144-6228B.[1][5]
Database references
SIMBAD data

α Reticuli has a visual companion, CCDM J04144-6228B, of apparent visual magnitude 12.0 and located approximately 48 arcseconds away.[5] Since the two stars have the same proper motion, they are believed to form a binary system, with a period of revolution of at least 60,000 years.[4]

References

  1. ^ a b c d e f g h i j k * alf Ret -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.
  2. ^ a b c HR 1336, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 4, 2008.
  3. ^ From apparent magnitude and parallax.
  4. ^ a b c d e f g Alpha Ret, Jim Kaler, Stars. Accessed on line September 4, 2008.
  5. ^ a b c d e Entry 04144-6228, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line September 4, 2008.
  6. ^ a b c CPD-62 332B -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.