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Micrometer measurements of double stars made at the Côte D'Azur and Calar Alto observatories
We report 312 micrometer measurements of 155 visual double stars madewith the 50 cm refractor at the Côte D'Azur observatory (Nice,France) and with the 152 cm telescope at Calar Alto observatory(Almería, Spain).
| Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
| Micrometer measurements of visual double stars made at Nice
Three-hundred thirty-five micrometer measurements of visual double starsmade at Nice Observatory with the 50-cm and 74-cm refractors arereported. The tables give the Washington Catalog number, letters of thecomponents if the star is multiple, the Aitken Catalog number, theobservational epoch, the observed position angle and angular distance,the number of nights, and the name of the observer.
| 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.
| Micrometer Observations of Double Stars and New Pairs - Part Ten
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
| Mesures d'etoiles doubles effectuees AU refracteurs de 38 CM puis de 50 CM de l'Observatoire de Nice.
Not Available
| Micrometer measures of doubles stars. III.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68...57V&db_key=AST
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Observation and Astrometry data
| Constellation: | Hercule |
| Right ascension: | 18h05m25.73s |
| Declination: | +16°23'42.2" |
| Apparent magnitude: | 8.76 |
| Distance: | 271.003 parsecs |
| Proper motion RA: | 1 |
| Proper motion Dec: | 5.8 |
| B-T magnitude: | 8.999 |
| V-T magnitude: | 8.78 |
Catalogs and designations:
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INHABITED SKY
