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J/A+AS/114/537      BVI photometric study of NGC 2453            (Mallik+, 1995)
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A deep BVI photometric study of the open cluster NGC 2453
     Mallik D.C.V., Sagar R., Pati A.K.
    <Astron. Astrophys. Suppl. Ser. 114, 537 (1995)>
    =1995A&AS..114..537M      (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, open; Photometry
Keywords: open clusters: individual: NGC 2453 - stars: evolution -
          planetary nebulae: individual: NGC 2452 - HR diagram

Description:
    CCD observations of the open cluster NGC 2453 have been carried out in
    B, V and I passbands. A total of 356 stars have been observed in a
    field of about 4'x6' of the sky centred on the cluster.
    Colour-magnitude diagrams in V, B-V and V, V-I have been generated
    down to V=20 and for the first time, the unevolved part of the cluster
    main sequence has been observed. The mean true distance modulus
    derived from these diagrams is 13.mag 85+/-0.2 yielding a distance of
    5.9+/-0.2kpc. A mean age of 25Myr has been derived for the cluster by
    fitting isochrones. The distance of approximately 6kpc puts the
    cluster much beyond the planetary nebula NGC 2452 whose largest
    estimated distance to date is about 3.5kpc. The two are not physically
    associated.

Objects:
    -------------------------------------
    RA  (2000) DE   Name(s)
    -------------------------------------
    07 47.8 -27 14  NGC 2453 = C 0745-271
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File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table3             50      356   BVI photometry of 356 stars in the
                                 Region of NGC 2453
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Byte-by-byte Description of file: table3
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   Bytes Format  Units   Label    Explanations
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   2-  4  I3     ---     Star     Star number
   6- 11  F6.2   pix     Xpos     X coordinate
  13- 19  F7.2   pix     Ypos     Y coordinate
  21- 25  F5.2   mag     Vmag     V magnitude
  28- 31  F4.2   mag     B-V      []? B-V colour index
  34- 37  F4.2   mag     V-I      V-I colour index
  39- 48  A10    ---     CrossId  Cross identification of stars (1)
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Note (1): G:  Gathier 1984
          MF: Moffat and Fitzgerald 1974
          S:  Seggewiss 1971
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References:
   Gathier R. 1984, "A study of planetary nebulae", Ph. D. Thesis, University
    of Groeningen, Chapter 3 Appendix, p. 58
   Moffat A.F.J., Fitzegerald M.P.  =1974A&AS...18...19M
   Seggewiss W. 1971 Veroeff. Astron. Inst. Bonn, 83. (1971VeBon..83...19S)
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(End)                                             Simona Mei [CDS]   26-Jul-1995