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HD 244731


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35 new bright medium- and high-amplitude variables discovered by the TYCHO instrument of the HIPPARCOS satellite
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Photoelectric photometry of M-type stars
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The stellar component of the galaxy as seen by the AFGL infrared sky survey
The noise-limited magnitudes for the Air Force Geophysical Laboratory(AFGL) Infrared Sky Survey have been estimated by direct comparison withground-based observations. Using these limiting magnitudes, 'pruned'versions of the AFGL catalog have been generated. Infrared observationsof all the stellar objects seen at 11, 20, or 27 microns and astatistical sample of the stars seen only at 4 microns are reported.Analysis of the observations leads to estimates of the absolute 4 and 10microns magnitudes and space densities for the two clases of objects.The expected results from the Infrared Astronomical Satellite arereexamined.

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Osservazione e dati astrometrici

Costellazione:Orione
Ascensione retta:05h32m54.47s
Declinazione:+13°03'06.9"
Magnitudine apparente:8.569
Moto proprio RA:-15.1
Moto proprio Dec:-16.1
B-T magnitude:10.124
V-T magnitude:8.698

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 244731
TYCHO-2 2000TYC 709-46-1
USNO-A2.0USNO-A2 0975-01701015

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