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HD 28995

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Absolute magnitudes for late-type dwarf stars for Sloan photometry We present a new formula for absolute magnitude determination forlate-type dwarf stars as a function of (g-r) and (r-i) for Sloanphotometry. The absolute magnitudes estimated by this approach arebrighter than those estimated by colour-magnitude diagrams, and theyreduce the luminosity function rather close to the luminosity functionof Hipparcos.
The u'g'r'i'z' Standard-Star System We present the 158 standard stars that define the u'g'r'i'z' photometricsystem. These stars form the basis for the photometric calibration ofthe Sloan Digital Sky Survey. The defining instrument system andfilters, the observing process, the reduction techniques, and thesoftware used to create the stellar network are all described. Webriefly discuss the history of the star selection process, thederivation of a set of transformation equations for theUBVRCIC system, and plans for future work.
Selection of standard stars for photometric observations with the 91-cm reflector at Okayama Not Available
UBV Photometry of 500 Southern Stars [erratum: 1973MNSSA..32...48C] Not Available
Photoelectric Three Colour Magnitudes for Southern Stars Not Available

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Osservazione e dati astrometrici

Costellazione:	Eridano
Ascensione retta:	04^h33^m16.19^s
Declinazione:	-21Â°08'07.1"
Magnitudine apparente:	9.826
Moto proprio RA:	-32.2
Moto proprio Dec:	-185.9
B-T magnitude:	10.618
V-T magnitude:	9.892

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 28995
TYCHO-2 2000	TYC 5897-1556-1
USNO-A2.0	USNO-A2 0675-01610854
HIP	HIP 21232

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