2MASS-GC02 / CJ1809-207 (Updated June 2024) RA: 18:09:36.50 DEC -20:46:44 (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 ========================================================================= 1 18:09:34.44 -20:47:48.8 R0 ---- 14.57 -- K CST 2 18:09:36.43 -20:47:12.1 R0 ---- 14.77 -- K CST 3 18:09:34.01 -20:46:57.0 R0 ---- 14.45 -- K CST 4 18:09:39.86 -20:46:40.4 R0 ---- 14.80 -- K CST 5 18:09:37.08 -20:46:57.0 R0 ---- 14.90 -- K CST 6 18:09:35.98 -20:47:11.6 R0 0.7000 14.566 0.320 K RR0 7 18:09:34.22 -20:46:56.1 R0 0.6517 14.754 0.232 K RR0 8 18:09:33.77 -20:46:29.4 R0 0.5704 15.040 0.266 K RR0 9 18:09:38.59 -20:46:04.9 R0 0.6273 15.301 0.233 K RR0 10 18:09:38.86 -20:47:26.4 R0 0.6033 14.950 0.312 K RR0 11 18:09:33.00 -20:47:07.7 R0 0.5513 14.943 0.386 K RR0 12 18:09:29.99 -20:45:48.2 R0 0.5699 15.453 0.294 K RR0 13 18:09:37.70 -20:48:37.5 R0 0.5803 14.817 0.269 K RR0 14 18:09:45.01 -20:46:09.1 R0 0.6088 15.079 0.256 K RR0 15 18:09:29.23 -20:48:10.9 R0 0.4893 15.217 0.312 K RR0 16 18:09:34.60 -20:49:00.6 R0 9.476 14.512 0.219 K C 17 18:09:29.06 -20:48:42.1 R0 2.6226 14.732 0.308 K E 18 18:09:40.59 -20:44:08.4 R0 0.5597 15.051 0.390 K RR0 19 18:09:25.91 -20:45:24.6 R0 0.2444 14.639 0.218 K ? 20 18:09:26.80 -20:48:30.2 R0 0.1185 14.093 0.121 K ? 21 18:09:47.33 -20:45:08.3 R0 ---- 13.9 2.6 K L 22 18:09:23.03 -20:47:15.8 R0 0.2022 15.630 0.526 K ? 23 18:09:39.26 -20:43:23.4 R0 0.2866 14.338 0.324 K ? 24 18:09:47.00 -20:44:15.8 R0 ---- 15.5 0.5 K L 25 18:09:36.88 -20:43:14.2 R0 4.4791 15.441 0.514 K E 26 18:09:48.58 -20:44:37.1 R0 0.2239 14.951 0.383 K ? 27 18:09:47.49 -20:44:05.5 R0 2.5073 15.480 0.540 K E 28 18:09:30.50 -20:50:11.6 R0 0.1584 15.932 0.291 K ? 29 18:09:25.86 -20:43:41.8 R0 0.5404 15.069 0.250 K RR0 30 18:09:29.13 -20:50:17.5 R0 0.2693 14.643 0.294 K ? 31 18:09:20.60 -20:45:11.3 R0 0.4728 15.516 0.279 K RR0 32 18:09:41.34 -20:42:47.3 R0 ---- 14.5 0.4 K L 33 18:09:52.23 -20:49:13.4 R0 5.6308 13.984 0.086 K C 34 18:09:31.98 -20:42:19.3 R0 0.4520 16.103 0.356 K ? 35 18:09:38.83 -20:42:13.7 R0 0.1302 16.147 0.473 K ? 36 18:09:37.76 -20:51:26.6 R0 1.3405 14.246 0.097 K C 37 18:09:30.12 -20:42:13.9 R0 0.6104 14.631 0.213 K E ================================================================== Supplementary Notes This "candidate" globular cluster was discovered by by Hurt et al. (2000) in the Two Micron All-Sky Survey (2MASS) data set and confirmed by Ivanov et al. (2000) from an near IR (K,J-K) CM diagram. Borissova et al. (2007) noted that the near IR (K,J-K) CM diagram has a predominantly red HB. V1-5: The CST classifications are from Alonso-Garcia et al. (2015). The remaining data are from Borissova et al. (2007) V6-37 All of the data are from the discovery paper by Alonso-Garcia et al. (2015) ================================================================= Discovery of the variable stars in 2MASS-GC02 V1-5 Borissova et al. (2007) with RA, dec and a K-band ID chart. They classified them all as RR Lyrae variables. However, Alonso-Garcia et al. (2015) later found, with improved photometry and temporal coverage, that none of them was a true variable star V6-38 = NV1-NV32 Alonso-Garcia et al (2015) with RA, dec (J2000) and a K-band finding chart. These variable star candidates are all within the tidal radius (4.9 arcminutes). In their discussion, they pointed out that some, but not all are probable cluster members. In addition, they discovered 70 variables out to a radius of 10 arcminutes from the cluster centre. ================================================================= References Alonso-Garcia, J., Dekany, I., Catelan, M., Contreras Ramos, R., Gran, F., Amigo, P., Leyton P. Minniti, D. 2015, AJ, 149, 99 Borissova, J., Ivanov, V. D., Stephens, A. W., Catelan, M., Minniti, D., Prieto, G. 2007, A&A, 390, 937 Hurt, R. L., Jarrett, T. H., Kirkpatrick, J. D., Cutri, R. M., Schneider, S. E., Skrutskie, M. & van Driel, W. 2000, AJ, 120, 1876 Ivanov, V. D., Borissova, J. & Vanzi, L. 2000, A&A, 362, L1 ======================================================================