| 词条 | U Andromedae |
| 释义 |
| name= U Andromedae }}{{Starbox observe | epoch=J2000 | ra={{RA|01|15|29.69623}}[1] | dec={{DEC|+40|43|08.39324}}[1] | appmag_v= 9.0 to 15.0[3] | constell=Andromeda }}{{Starbox character | class=M6e[3] | b-v= | u-b= | variable=Mira[3] }}{{Starbox astrometry | radial_v= -4.0 ± 5[2] | prop_mo_ra=11.416 ± 0.321 [1] | prop_mo_dec=-8.392 ± 0.297 [1] | parallax= 1.4745 | p_error= 0.1511 | parallax_footnote = [1] | absmag_v= }}{{Starbox catalog | names=HD 7482, BD+39 291a [2] }}{{Starbox reference | }}{{Starbox end}}U Andromedae is a variable star in the constellation of Andromeda. It is a star of spectral type M6e, then it is classified as a Mira variable, and varies from an apparent visual magnitude of 9.0 at maximum brightness to a magnitude of 15.0 at minimum brightness, with a period of approximately 347 days.[3] It was first observed to be variable by Thomas D. Anderson during 1894 and 1895.[4][5] References1. ^1 2 3 4 {{cite DR2}} {{Stars of Andromeda}}{{Var-star-stub}}2. ^1 {{cite simbad | title=U And | access-date=October 8, 2018 }} 3. ^1 2 3 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. 4. ^New variable star in Andromeda, T. D. Anderson, Astronomische Nachrichten 139 (1896), p. 117–118, {{Bibcode|1896AN....139Q.117A}}. 5. ^Third catalogue of variable stars, S. C. Chandler, Astronomical Journal 16, #19 (issue #379, July 8, 1896), pp. 145–172, {{Bibcode|1896AJ.....16..145C}}, {{doi|10.1086/102484}}. 7 : Mira variables|Andromeda (constellation)|Henry Draper Catalogue objects|M-type giants|Objects with variable star designations|Durchmusterung objects|Emission-line stars |
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