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Везани чланци
Kinematics of Hipparcos Visual Binaries. II. Stars with Ground-Based Orbital Solutions
This paper continues kinematical investigations of the Hipparcos visualbinaries with known orbits. A sample, consisting of 804 binary systemswith orbital elements determined from ground-based observations, isselected. The mean relative error of their parallaxes is about 12% andthe mean relative error of proper motions is about 4%. However, even 41%of the sample stars lack radial velocity measurements. The computedGalactic velocity components and other kinematical parameters are usedto divide the stars with known radial velocities into kinematical agegroups. The majority (92%) of binaries from the sample are thin diskstars, 7.6% have thick disk kinematics and only two binaries have halokinematics. Among them, the long-period variable Mira Ceti has a verydiscordant {Hipparcos} and ground-based parallax values. From the wholesample, 60 stars are ascribed to the thick disk and halo population.There is an urgent need to increase the number of the identified halobinaries with known orbits and substantially improve the situation withradial velocity data for stars with known orbits.
| Mesures d'etoiles doubles faites a Nice (5eme serie. Double star measurements made at Nice
We present the last observations from two lists: General program and MLRpairs, made with the 50~cm refractor of Nice Observatory.
| Observations of Double Stars and New Pairs. XVII.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996ApJS..105..475H&db_key=AST
| Not Available
Not Available
| 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.
| 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 Measurements of Visual Double Stars - Part Three -
Not Available
| Measurements of binary stars performed at Nice (Second series)
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984A&AS...57..467M&db_key=AST
| Orbital elements for twenty-eight visual binaries
In addition to presenting the orbital elements of 22 revised and six newpairs, attention is given to the ephemeris, dynamical parallax, and O-Cresiduals of each star. The stars are 148-BU 1026, 864-A 2308, 1315-HU531, 1530-A 2407, 2578-A 983, 3552-HU 1090, 6291-STF 1130, 6721-STF1211, 6814-HU 714, 7124-HU 718, 7896-A 2768, 8680-HU 640, 8884-A 2489,9185-A 1101, 10158-A 349, 10230-STT 315, 10531-HU 1179, 10912-STF 2244,1236-BU 1129, 12469-Schj 22, BD + 39 3878-Kpr 94, I12577-HU 951, 13169-A606, 14783-H 1 48, 15378-A 889, 15650-A 308, 15902-BU 172, and 17030-A424.
| 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
| Micrometer observations of double stars.8.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST
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Посматрања и Астрометриски подаци
| Сазвежђа: | Змај |
| Ректацензија: | 19h30m47.59s |
| Deклинација: | +63°37'04.3" |
| Apparent магнитуда: | 9.368 |
| Proper motion RA: | 17.2 |
| Proper motion Dec: | 1.4 |
| B-T magnitude: | 9.848 |
| V-T magnitude: | 9.408 |
Каталог и designations:
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