Terzan 9 / C1758-268 (Updated July 2016) RA: 18:01:38.8 DEC: -26:50:23 (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 Terzan 9 is a heavily reddened cluster in a rich field in the inner bulge. A near infrared [K,J-K] CM diagram by Valenti et al. (2007) shows that the innermost cluster region (r less than 30 arcsec) is characterized by a narrow RGB and a blue HB. From their data, they derived a photometric [Fe/H] = -1.21. Lynch & Ransom (2011) conducted a search for pulsars, but did not find any in Terzan 9. =================================================================== References Lynch, R. S. & Ransom, S. M. 2011, ApJ, 730, L11 Valenti, E., Ferraro, F. R., Origlia, L. 2010, MNRAS, 402, 1729 ================================================================