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J/A+AS/105/15    Proper motions of stars in NGC 2286                (Tian+ 1994)
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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
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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