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HD 235994


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관련 글

Orbital Elements, Dynamical Masses and Parallaxes for Four Double and One Triple Systems
New orbital elements for four binaries: WDS 00416+2438 = WRH 28, WDS01554+0257 = A 2407 = ADS 1530, WDS 15031+4439 = CHR 43 and WDS22550+5132 = HU 785 = ADS 16368 and one triple star WDS 23393+4543 = ADS16904: CHR 149 Aa and A 643 Aa-B are determined. Preliminary dynamicalmasses and parallaxes are also given.

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.

Micrometer Measures of Double Stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJS....4...45V&db_key=AST

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관측 및 측정 데이터

별자리:도마뱀자리
적경:22h54m59.53s
적위:+51°31'31.9"
가시등급:9.294
적경상의 고유운동:13
적위상의 고유운동:-3.5
B-T magnitude:9.939
V-T magnitude:9.348

천체목록:
일반명   (Edit)
HD 1989HD 235994
TYCHO-2 2000TYC 3634-68-1
USNO-A2.0USNO-A2 1350-17543234
HIPHIP 113166

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