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HD 76273

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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.
Final catalogue of 229 photometric standards in UBV system near the selected areas 1-115 Not Available
Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars A new photometric index was used to characterize the flux depression at5200 A in a photoelectric filter photometric study of a large number ofnormal A-stars, Ap-stars, Am-stars, and Hg-Mn-stars. The new index isdefined as a = g - (h + y)/2, where g and h are the brightnesses at 5240and 5020 A, respectively, measured by interference filters, and y is thebrightness measured with a Stromgren filter. The index reveals a markedcontrast between normal and peculiar stars.
The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system Not Available

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Osservazione e dati astrometrici

Costellazione:	Idra
Ascensione retta:	08^h54^m58.38^s
Declinazione:	-03Â°33'20.1"
Magnitudine apparente:	6.981
Distanza:	120.773 parsec
Moto proprio RA:	-3.6
Moto proprio Dec:	17.7
B-T magnitude:	7.22
V-T magnitude:	7.001

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 76273
TYCHO-2 2000	TYC 4869-1686-1
USNO-A2.0	USNO-A2 0825-06626455
HIP	HIP 43774

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