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HD 38312


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Spectral Classification of Stars in A Supplement to the Bright Star Catalogue
MK spectral types are given for about 584 stars in A Supplement to theBright Star Catalogue. These are compared with Hipparcos parallaxes tocheck the reliability of those classifications. The estimated errors are+/-1.2 subtypes, and 10% of the luminosity classes may be wrong.

Far-ultraviolet stellar photometry: A field in Orion
Far-ultraviolet photometry for 625 objects in Orion is presented. Thesedata were extracted from electrographic camera images obtained duringsounding rocket flights in 1975 and 1982. The 1975 images were centeredclose to the belt of Orion while the 1982 images were centeredapproximately 9 deg further north. One hundred and fifty stars fell inthe overlapping region and were observed with both cameras. Sixty-eightpercent of the objects were tentatively identified with known starsusing the SIMBAD database while another 24% are blends of objects tooclose together to separate with our resolution. As in previous studies,the majority of the identified ultraviolet sources are early-type stars.However, there are a significant number for which no such identificationwas possible, and we suggest that these are interesting objects whichshould be further investigated. Seven stars were found which were brightin the ultraviolet but faint in the visible. We suggest that some ofthese are nearby white dwarfs.

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Сазвежђа:Орион
Ректацензија:05h44m33.20s
Deклинација:-06°51'51.3"
Apparent магнитуда:6.767
Даљина:137.363 parsecs
Proper motion RA:16.8
Proper motion Dec:5.7
B-T magnitude:6.99
V-T magnitude:6.786

Каталог и designations:
Proper имена   (Edit)
HD 1989HD 38312
TYCHO-2 2000TYC 4779-699-1
USNO-A2.0USNO-A2 0825-01657475
HIPHIP 27083

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