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HD 21704


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Optical identifications of IRAS point sources - The Fornax, Hydra I and Coma clusters
Optical identifications are presented for 66 IRAS point sources in theregion of the Fornax cluster of galaxies, 106 IRAS point sources in theregion of the Hydra I cluster of galaxies (Abell 1060), and 59 IRASpoint sources in the region of the Coma cluster of galaxies (Abell1656). Eight other sources in Hydra I do not have optical counterpartsand are very probably due to IR cirrus. Twenty-three (35 percent) of theFornax sources are associated with stars and 43 (65 percent) withgalaxies; 48 (42 percent) of the Hydra I sources are associated withstars and 58 (51 percent) with galaxies; 18 (31 percent) of the Comasources are associated with stars and 41 (69 percent) with galaxies. Thestellar and infrared cirrus surface density is consistent with thegalactic latitude of each field.

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Observation and Astrometry data

Constellation:Fornax
Right ascension:03h28m54.69s
Declination:-33°39'19.1"
Apparent magnitude:7.163
Distance:212.766 parsecs
Proper motion RA:54.1
Proper motion Dec:-5.5
B-T magnitude:8.816
V-T magnitude:7.3

Catalogs and designations:
Proper Names
HD 1989HD 21704
TYCHO-2 2000TYC 7024-237-1
USNO-A2.0USNO-A2 0525-01181803
HIPHIP 16215

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