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Discovery of two short-period eclipsing binaries with active components.
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| UBV(RI)c photometry of equatorial standard stars - A direct comparison between the northern and southern systems
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Not Available
| UBVRI photometric standard stars around the celestial equator
It is pointed out that accurate, internally consistent, and readilyaccessible standard star photometric sequences are necessary for thecalibration of the intensity and color data which astronomers obtain atthe telescope. The photometric results provided in connection with thepresent study represent the first part of an effort which is concernedwith the presentation of UBVRI photoelectric photometric standard starsin the magnitude range from 7 to 17 over as broad a range in color aspossible. All of the photometric observations were made with a 31034type photomultiplier used in a pulse counting mode. Some 15 to 25standard stars chosen from Cousins' lists (1973, 1976) in the E-regionswere observed with an 0.4-m telescope each night along with the programstars. UBVRI standard stars were observed periodically throughout thenight. Observations with a 0.9-m telescope were also conducted. TheUBVRI photoelectric observations take into account 223 stars.
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Not Available
| Lichtelektrische UBV-Photometrie von Standardsternen und in vier Sternfeldern am Äquator
Not Available
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Osservazione e dati astrometrici
| Costellazione: | Aquila |
| Ascensione retta: | 20h38m16.45s |
| Declinazione: | +01°00'59.4" |
| Magnitudine apparente: | 7.892 |
| Moto proprio RA: | 11.1 |
| Moto proprio Dec: | -2 |
| B-T magnitude: | 10.01 |
| V-T magnitude: | 8.067 |
Cataloghi e designazioni:
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