NGC 6380 / Tonantzintla 1 / Pismis 25 /C1731-390
RA: 17:34:28.0  DEC: -39:04:09  (J2000)

(Most recent updates: 
Membership probability flag - 2024; Remaining data - April 2014)
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Bytes  Format      Explanation
1-8      A8        Star ID
10-32  A11,1x,A11  Position
34-35    A2        Membership probability flag based on data published
                   by Prudil & Arellano Ferro (2024)
                    m1: prob >=0.85;  m2: prob >=0.7 and <0.85;
                    m3: prob >= 0.5 and <0.7; f: prob <0.5
                    u:  no data available
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               Mem   Period <mag>  ampl  C Type  Notes/
         RA          Dec        Flag                              Remarks
=========================================================================
1        17:34:26.46 -39:02:00.5 u  ----     --     --      ?
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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

Prudil Z., Arellano Ferro, A. 2024, MNRAS, 534, 3654

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