ESO 452-SC11 / C1636-283 (updated September 2018) RA: 16:39:25.45 DEC: -28:23:55.3 (J2000) ============================================================ 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 ========================================================================= ID Position Period ampl C Type Notes/ RA/X Dec/Y Units Remarks ========================================================================= No known variables. ========================================================================= Supplementary Notes Bica et al. (1999) published a VI color-magnitude diagram and confirmed that this object is a poorly populated globular cluster with evidence of depletion at the lower main sequence. Their HB had a red ccomponent along with some bluer stars. Subsequently, Cornish et al. (2006) published a VI CMD and found the features were consistent with the Bica et al. diagram. A [g vs g-z] CM diagram published by Simpson et al. (2017) included 11 stars known to be cluster members; 8 of them were on the RGB or AGB and the other 3 were red HB stars. The cluster is relatively metal rich according to spectroscopic observations of red giants by Koch et al. (2017): [Fe/H]=-0.88 and by Simpson et al. (2017): [Fe/H] ~-0.8. ===================================================================== References Bica, E., Ortolani, S., Barbuy, B. 1999, A&A Supp., 136, 363 Cornish, A. S. M., Phelps, R. L., Briley, M. M., Friel, E. D. 2006, AJ, 131, 2543 Koch, A., Hansen, C. J., Kunder, A. 2017, A&A, 604, A41 Simpson, J. D., De Silva, G., Martell, S. L., Navin, C. A., Zucker, D. B. 2017, MNRAS, 472, 2856 =====================================================================