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HD 94684


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Identification of moving groups and member selection using HIPPARCOS data
A new method to identify coherent structures in velocity space - movinggroups - in astrometric catalogues is presented: the Spaghetti method.It relies on positions, parallaxes and proper motions, and is ideallysuited to searching for moving groups in the Hipparcos Catalogue. Noradial-velocity information is required. The method has been testedextensively on synthetic data, and applied to the Hipparcos measurementsfor the Hyades and IC 2602 open clusters. The resulting lists of membersagree very well with those of Perryman et al. for the Hyades and thoseof Whiteoak & Braes for IC 2602.

Open clusters with Hipparcos. I. Mean astrometric parameters
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Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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Observation and Astrometry data

Constellation:りゅうこつ座
Right ascension:10h54m28.29s
Declination:-63°58'21.6"
Apparent magnitude:9.058
Proper motion RA:-18.8
Proper motion Dec:10
B-T magnitude:9.538
V-T magnitude:9.098

Catalogs and designations:
Proper Names
HD 1989HD 94684
TYCHO-2 2000TYC 8966-20-1
USNO-A2.0USNO-A2 0225-09818145
HIPHIP 53330

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