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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
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| ICCD speckle observations of binary stars. VIII - Measurements during 1989-1991 from the Cerro Tololo 4 M telescope
One-thousand eighty-eight observations of 947 binary star systems,observed by means of speckle interferometry with the 4 m telescope onCerro Tololo, are presented. These measurements, made during the period1989-1991, comprise the second installment of results stemming from theexpansion of our speckle program to the southern hemisphere.
| Micrometer observations of double stars and new pairs. XIII
From a program of double star observations which emphasizes orbital,neglected, and newly discovered pairs, results obtained from October1984 to January 1987 are presented. A total of 3030 visual and 550photographic measures are listed. The positions in WDS format andDurchmusterung numbers are shown for 117 pairs for which firstobservations appear in this paper. Magnitudes are estimated for some ofthe objects.
| Determination of proper motions in the region of the association Scorpius OB1
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Membre dels grups següents:
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Dades d'Observació i Astrometria
| Constel·lació: | Scorpius |
| Ascensió Recta: | 17h05m12.99s |
| Declinació: | -41°13'54.5" |
| Magnitud Aparent: | 8.531 |
| Distancia: | 98.135 parsecs |
| Moviment propi RA: | 12.1 |
| Moviment propi Dec: | 11.1 |
| B-T magnitude: | 9.124 |
| V-T magnitude: | 8.58 |
Catàlegs i designacions:
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