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The Tokyo PMC catalog 90-93: Catalog of positions of 6649 stars observed in 1990 through 1993 with Tokyo photoelectric meridian circle
The sixth annual catalog of the Tokyo Photoelectric Meridian Circle(PMC) is presented for 6649 stars which were observed at least two timesin January 1990 through March 1993. The mean positions of the starsobserved are given in the catalog at the corresponding mean epochs ofobservations of individual stars. The coordinates of the catalog arebased on the FK5 system, and referred to the equinox and equator ofJ2000.0. The mean local deviations of the observed positions from theFK5 catalog positions are constructed for the basic FK5 stars to comparewith those of the Tokyo PMC Catalog 89 and preliminary Hipparcos resultsof H30.
| Photometric behaviour of the interacting binary V 1914 Cygni
New photoelectric observations of the interacting binary HD 207739 = V1914 Cyg are presented. An orbital period of 141.25 d is determined. Thelight and color curves and their phase relation to the radial velocitychanges are in agreement with the accretion disk model of this eclipsingbinary star suggested by Parsons et al. (1988).
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Cigno |
| Ascensione retta: | 21h52m13.45s |
| Declinazione: | +43°47'01.3" |
| Magnitudine apparente: | 7.908 |
| Distanza: | 414.938 parsec |
| Moto proprio RA: | 5.4 |
| Moto proprio Dec: | 6.8 |
| B-T magnitude: | 9.826 |
| V-T magnitude: | 8.067 |
Cataloghi e designazioni:
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