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Observations of double stars and new pairs. XV The study reports visual and photographic measures listed for 1150 pairsobtained in the time frame 1989.91-1992.15, including 221 new doublestars. Magnitudes were estimated for a part of the objects, especiallythe fainter ones. Plate orientations were calculated from field stars ofknown positions and were precessed to the epoch; numbers of nights andof measured exposures are given. Reobservation of faint, neglected pairsreveal many corrections to the data from the old discovery lists.
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Membre dels grups següents:
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Dades d'Observació i Astrometria
Constel·lació: | Ophiucus |
Ascensió Recta: | 17h24m30.99s |
Declinació: | +09°00'37.0" |
Magnitud Aparent: | 9.693 |
Moviment propi RA: | -2.5 |
Moviment propi Dec: | 11.3 |
B-T magnitude: | 10.33 |
V-T magnitude: | 9.746 |
Catàlegs i designacions:
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