U Andromedae

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U Andromedae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Andromeda
Right ascension 01h 15m 29.8s[1]
Declination 40° 43′ 09″[1]
Apparent magnitude (V) 8.9 to 15.0[2]
Spectral type M6e[1]
Other designations
HD 7482, BD+39 291a[1]
Database references

U Andromedae is a variable star in the constellation of Andromeda. It is classified as a Mira variable, and varies from an apparent visual magnitude of 8.9 at maximum brightness to a magnitude of 15.0 at minimum brightness, with a period of approximately 347 days.[2] It was first observed to be variable by Thomas D. Anderson during 1894 and 1895.[3][4]


  1. ^ a b c d V* U And -- Variable Star of Mira Cet type, database entry, SIMBAD. Accessed on line September 18, 2008.
  2. ^ a b U And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250.
  3. ^ New variable star in Andromeda, T. D. Anderson, Astronomische Nachrichten 139 (1896), p. 117–118, Bibcode1896AN....139Q.117A.
  4. ^ Third catalogue of variable stars, S. C. Chandler, Astronomical Journal 16, #19 (issue #379, July 8, 1896), pp. 145–172, Bibcode1896AJ.....16..145C, doi:10.1086/102484.