NGC 6380 / Tonantzintla 1 / Pismis 25 /C1731-390
(Updated April 2014)

RA: 17:34:28.0  DEC: -39:04:09  (J2000)

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Bytes  Format      Explanation
1-8      A8        Star ID
10-32  A11,1x,A11  Position
34-35    A2        Units for position
                    R0 denotes RA, DEC in the J2000 coordinates
                    R5 denotes RA, DEC in the 1950 coordinates
                    XA denotes X, Y in arcseconds 
                    XP denotes X, Y in pixels
37-44   F8.4       Period  (days)
46-51   F6.3       Mean magnitude (or maximum magnitude if "max" 
                      is indicated in the remarks column)
53-57   F5.3       Light amplitude (range of variability)
59      A1         Colour for mean magnitude and amplitude
                    e.g.  B, V, R, I, J, K
                    or P (for photographic).
61-65   A5         Type of variable (draft 2006 GCVS classifications)
                      CST denotes non variable stars previously designated
                      as variables
67-80   A19        Notes and Remarks  (f denotes field star)
 
 "--" or "----" indicates no data available
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ID       Position                     Period <mag>  ampl  C Type  Notes/
         RA/X        Dec/Y     Units                              Remarks
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1        17:34:26.46 -39:02:00.5 R0 ----     --     --      ?
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Supplementary Notes 
 
NGC 6380 is a metal rich bulge cluster.  According to the 2010 version 
of the Harris (1996) catalogue, it has [Fe/H] = -0.75 and is probably a 
core collapsed cluster.
          
VI photometry by Ortolani et al. (1998) showed a red HB morphology.
Thus it is unlikely that there will be any RR Lyrae or Cepheid
variables. The existing photometry does not extend to a faint enough
level to delineate a blue straggler region.

Discovery of the variable star in NGC 6380:

  V1
    Fourcade et al. (1966) with x,y coordinates and an ID chart
    The RA and dec for V1 were drived by Samus et al. (2009).
    No further data are available for this star.
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References

Fourcade, C. R., Laborde, J. R., Albarracin, J. 1966, Atlas y Catalogue
de Estrellas Variables en Cumulos Globulares al sur de -29 degrees, Cordoba

Harris, W. E. 1996, AJ, 112, 1487

Ortolani, S., Bica, E., Barbuy, B. 1998, A&AS, 127, 471

Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M.,
Durlevich, O. V. 2009, PASP, 121, 1378
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