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HD 21909


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The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.

SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.

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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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Ocak
Sað Açýklýk:03h30m50.55s
Yükselim:-32°30'19.6"
Görünürdeki Parlaklýk:8.917
Uzaklýk:280.112 parsek
özdevim Sað Açýklýk:4.6
özdevim Yükselim:7.1
B-T magnitude:11.175
V-T magnitude:9.104

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 21909
TYCHO-2 2000TYC 7024-576-1
USNO-A2.0USNO-A2 0525-01195097
HIPHIP 16366

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