IC 1257 / C1724-070
RA: 17:27:08.5 DEC: -07:05:35 (J2000)

(Most recent updates: 
Membership probability flag - 2024; Remaining data - March 2014)
============================================================
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
=========================================================================
ID       Position               Mem   Period <mag>  ampl  C Type  Notes/
         RA          Dec        Flag                              Remarks
=========================================================================
No known variables.

======================================================================
Supplementary Notes 

We assigned the "IAU nomenclature" name for this cluster on the basis
of its 1950 position. 

IC 1257 has only been recognized as a Galactic globular cluster 
since Harris et al. (1997) published a CM diagram which reveals that it
is a highly reddened cluster well beyond the Galactic centre. 
The diagram shows a well defined blue HB, but the observations do not 
extend faint enough to show the subgiant region or main sequence turnoff.
==================================================================
References

Harris, W. E., Phelps, R. L., Madore, B. F., Pevunova, O., Skiff, B. A.,
Crute, C., Wilson, B., Archinal, B. A. 1997, AJ, 113, 688

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

====================================================================