J/A+AS/105/15 Proper motions of stars in NGC 2286 (Tian+ 1994)
Proper motions of stars in the region of open cluster NGC 2286 and its
membership study
Tian K.P., Zhao J.L., van Leeuwen F.
<Astron. Astrophys. Suppl. Ser. 105, 15 (1994)>
=1994A&AS..105...15T 1994A&AS..105...15T
ADC_Keywords: Clusters, open; Proper motions
Keywords: astrometry - open clusters: NGC 2286
Abstract:
Relative proper motions, their corresponding observed errors and
membership probabilities of 2400 stars in the open cluster NGC 2286
region are determined from ASTROSCAN measurements of 8 plates made at
Leiden Observatory. The plates have the maximum epoch difference of
some 70 years and were taken with the double astrograph at Zo-Se
station of Shanghai Observatory, which has an aperture of 40 cm, a
focal length of 6.9 m and a scale of 30 arcsec/mm. The number of stars
with membership probabilities higher than 0.7 and radial distances
from the cluster centre less than 12' is 90. The average standard
errors of proper motions vary from ±0.0007"/yr for bright stars in
the inner part of the field to some ±0.0016"/yr for faint stars in
the outer part of the field, and are statistically dependent on the
number of measured plates per star. It is found from an analysis of
the surface number density distribution of cluster members that the
angular radius of NGC 2286 is some 12' and the corresponding linear
radius 4.5 pc.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7 77 2400 Catalogue of proper motion and membership
probabilities in the NGC2286
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Byte-by-byte Description of file: table7
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Bytes Format Units Label Explanations
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2- 5 I4 --- Seq Ordinal number of stars
7- 11 A5 --- Li Identification numbers in Li's catalogue
(Ann. Shanghai Obs. Zo-Se 23, 19, 1954)
13- 19 F7.3 cm Xpos X coordinate
20- 26 F7.3 cm Ypos Y coordinate
27- 28 A2 --- n_Bmag [* ] An * indicates that the photographic
magnitude is taken from Chicarini
29- 33 F5.2 mag Bmag Photographic magnitude
36- 40 F5.2 mag BLi Magnitudes of stars listed in Li's catalogue
41- 48 F8.3 10mas/yr pmX X-proper motion (arcsec/century)
49- 55 F7.3 10mas/yr e_pmX Observed error of X-proper motion
56- 63 F8.3 10mas/yr pmY Y-proper motion (arcsec/century)
64- 70 F7.3 10mas/yr e_pmY Observed error of Y-proper motion
71- 74 I4 % Pr Proper motion membership probabilities
75- 77 I3 --- Npl Numbers of measured plates of stars
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(End) Patricia Bauer [CDS] 19-Jan-1994