NGC 6939

UBV CCD observations

No	Ref	V	BV
0046	315	14.702	0.689
0047	315	15.464	0.767
0048	315	16.439	1.028
0049	315	16.005	0.826
0054	315	13.822	0.904
0055	315	15.295	0.733
0056	315	15.203	0.692
0058	315	13.370	0.907
0059	315	12.423	0.658
0060	315	15.320	0.851
0064	315	16.013	0.785
0066	315	13.046	0.638
0072	315	15.572	0.927
0074	315	15.082	1.586
0075	315	14.304	0.804
0078	315	16.291	0.866
0080	315	13.990	1.081
0082	315	15.392	0.849
0083	315	14.610	1.076
0084	315	15.787	0.780
0085	315	15.440	0.910
0087	315	14.328	0.752
0088	315	16.018	0.875
0089	315	15.572	0.827
0090	315	14.152	0.858
0091	315	16.263	0.844
0093	315	15.308	0.927
0095	315	14.528	0.738
0097	315	14.723	0.720
0098	315	15.954	0.871
0099	315	14.051	0.822
0100	315	14.900	0.738
0101	315	15.017	1.258
0102	315	14.917	0.705
0103	315	16.035	0.803
0104	315	15.653	0.760
0105	315	14.575	0.728
0106	315	11.421	0.477
0108	315	13.353	1.319
0109	315	13.746	0.960
0110	315	14.245	0.926
0112	315	15.120	0.798
0113	315	14.171	0.833
0115	315	14.603	0.692
0116	315	15.286	0.714
0118	315	14.337	0.727
0119	315	14.105	0.706
0120	315	15.340	0.771
0121	315	12.559	1.584
0122	315	13.127	1.128
0125	315	13.791	0.831
0126	315	14.824	0.695
0127	315	16.268	0.754
0129	315	15.761	0.741
0130	315	13.135	1.299
0131	315	15.028	0.750
0132	315	14.082	0.809
0133	315	12.288	1.565
0134	315	13.007	1.388
0135	315	12.639	1.116
0136	315	15.392	0.818
0138	315	15.689	0.829
0139	315	15.046	0.898
0141	315	13.372	1.402
0142	315	14.770	0.750
0145	315	13.073	1.341
0146	315	13.333	1.284
0147	315	15.083	0.763
0148	315	14.745	0.684
0149	315	14.196	0.762
0151	315	15.493	0.853
0152	315	14.933	0.703
0154	315	15.682	0.795
0157	315	14.572	0.738
0159	315	15.611	0.757
0160	315	14.340	0.841
0161	315	15.686	0.784
0162	315	15.977	0.810
0164	315	12.955	0.562
0165	315	13.964	0.680
0166	315	14.764	0.673
0167	315	14.700	0.722
0168	315	12.633	0.344
0169	315	14.965	0.757
0170	315	13.032	1.376
0171	315	14.826	0.798
0172	315	15.551	1.173
0173	315	14.835	1.276
0174	315	14.835	0.770
0175	315	15.948	0.777
0177	315	14.642	0.763
0178	315	15.589	1.053
0180	315	15.483	0.823
0182	315	12.822	1.420
0183	315	14.177	0.745
0184	315	14.844	0.895
0185	315	12.458	1.708
0186	315	16.037	0.863
0187	315	14.189	0.670
0189	315	15.054	0.890
0191	315	15.365	0.778
0192	315	14.846	0.853
0193	315	14.207	0.759
0194	315	15.215	1.148
0195	315	15.529	0.750
0196	315	14.259	0.685
0197	315	15.398	0.980
0200	315	15.379	0.837
0201	315	13.768	0.702
0203	315	14.497	0.715
0206	315	14.676	1.214
0207	315	15.271	0.826
0208	315	15.259	0.820
0209	315	13.991	1.261
0210	315	16.105	0.895
0211	315	14.538	0.701
0212	315	12.063	1.760
0213	315	14.132	0.898
0214	315	13.164	1.318
0215	315	15.062	0.769
0216	315	15.482	0.783
0217	315	14.870	0.965
0218	315	15.910	0.797
0220	315	14.608	0.596
0221	315	14.003	0.778
0222	315	14.961	0.804
0223	315	15.649	0.996
0224	315	15.504	0.675
0226	315	14.812	0.731
0227	315	14.830	0.798
0229	315	15.815	0.794
0230	315	13.047	1.358
0232	315	14.569	0.956
0233	315	14.614	0.812
0234	315	14.674	0.979
0235	315	15.480	0.874
0236	315	15.925	0.877
0237	315	15.645	0.787
0238	315	15.787	0.901
0240	315	14.767	0.889
0244	315	15.462	1.032
0245	315	14.986	0.760
0246	315	15.681	0.777
0247	315	14.247	0.802
0248	315	13.303	1.489
0249	315	14.501	0.806
0250	315	15.231	0.806
0251	315	16.184	0.764
0253	315	16.066	0.822
0254	315	14.626	0.764
0255	315	15.174	0.782
0257	315	15.454	0.866
0258	315	14.275	0.780
0259	315	15.152	0.783
0261	315	14.459	0.768
0262	315	15.298	0.845
0264	315	15.104	0.755
0266	315	14.537	0.746
0267	315	15.591	0.825
0268	315	14.353	0.805
0269	315	14.260	1.607
0270	315	14.932	0.874
0272	315	14.705	0.852
0278	315	14.653	0.566
0279	315	13.744	0.919
0281	315	15.202	0.813
0283	315	14.679	0.968
0284	315	15.532	0.843
0285	315	15.723	0.834
0286	315	14.569	0.897
0287	315	15.568	0.804
0290	315	14.585	0.734
0291	315	14.797	0.808
0292	315	13.175	1.415
0294	315	13.218	1.377
0297	315	14.805	0.808
0299	315	15.132	0.863
0300	315	14.585	1.074
0303	315	14.142	0.883
0305	315	15.217	0.869
0306	315	15.576	0.883
0308	315	14.326	0.791
0309	315	14.942	0.835
0311	315	13.262	1.367
0313	315	15.878	0.990
0315	315	15.751	0.860
0665	315	16.133	0.819
0666	315	16.288	1.540
0667	315	16.493	0.842
0668	315	16.517	1.016
0669	315	16.953	1.392
0670	315	17.567	0.954
0671	315	17.673	1.118
0672	315	17.807	0.727
0673	315	17.925	1.036
0674	315	17.919	1.133
0675	315	17.927	1.284
0676	315	18.028	1.171
0677	315	18.204	0.937
0678	315	18.153	1.653
0679	315	18.361	0.893
0680	315	18.338	1.233
0681	315	18.489	1.289
0682	315	18.594	1.093
0683	315	18.636	1.182
0684	315	18.768	1.464
0685	315	19.041	1.719
0686	315	19.082	1.326
0687	315	19.121	1.229
0688	315	19.458	1.238
0689	315	19.447	1.221
0690	315	19.518	1.124
0691	315	19.553	1.140
0692	315	17.315	0.972
0693	315	17.662	1.450
0694	315	18.406	1.166
0695	315	18.742	1.273
0696	315	16.737	1.106
0697	315	18.206	1.178
0698	315	17.635	0.965
0699	315	16.290	1.487
0700	315	18.095	1.450
0701	315	16.212	0.903
0702	315	16.173	0.920
0703	315	17.538	1.362
0704	315	18.128	0.861
0705	315	17.679	0.980
0706	315	17.786	1.133
0707	315	18.645	1.034
0708	315	18.091	1.057
0709	315	18.168	1.026
0710	315	17.024	1.000
0711	315	17.162	0.994
0712	315	17.440	0.302
0713	315	17.753	-0.345
0714	315	14.129	0.779
1002	315	12.286	0.719
1005	315	12.498	1.432
1009	315	12.787	1.320
1010	315	12.815	1.381
1012	315	12.895	1.321
1025	315	13.262	0.728
1026	315	13.292	1.376
1031	315	13.619	1.452
1033	315	13.711	0.814
1039	315	13.778	0.819
1046	315	14.097	0.827
1061	315	14.259	0.846
1062	315	14.295	0.836
1065	315	14.341	0.917
1067	315	14.325	0.829
1071	315	14.372	0.963
1072	315	14.423	0.720
1076	315	14.533	0.941
1086	315	14.589	0.766
1095	315	14.657	0.720
1100	315	14.726	0.745
1105	315	14.810	0.858
1118	315	14.882	0.697
1119	315	14.925	0.740
1120	315	14.910	1.232
1124	315	14.936	0.863
1130	315	15.003	1.315
1133	315	15.038	0.818
1135	315	15.061	0.713
1150	315	15.226	0.902
1151	315	15.212	0.716
1154	315	15.273	0.856
1162	315	15.352	0.914
1166	315	15.433	0.816
1170	315	15.470	0.998
1195	315	15.778	0.936
1199	315	15.887	1.637
1200	315	15.900	0.907
1202	315	15.820	0.783
1203	315	15.831	0.783
1205	315	15.961	0.923
1209	315	15.946	0.923
1211	315	15.976	1.022
1212	315	15.963	0.938
1213	315	15.964	0.806
1220	315	16.101	0.918
1221	315	16.056	0.893
1222	315	16.157	0.853
1224	315	16.180	0.810
1225	315	16.164	0.838
1226	315	16.216	1.311
1227	315	16.231	0.835
1228	315	16.248	0.914
1229	315	16.294	1.492
1230	315	16.259	0.954
1231	315	16.277	0.902
1232	315	16.259	0.945
1234	315	16.412	1.329
1235	315	16.505	0.903
1236	315	16.291	0.834
1237	315	16.279	1.059
1238	315	16.296	0.911
1240	315	16.352	0.911
1241	315	16.306	1.178
1242	315	16.349	1.034
1243	315	16.318	0.842
1244	315	16.368	1.006
1245	315	16.356	0.914
1246	315	16.320	0.884
1247	315	16.353	1.021
1248	315	16.338	0.850
1249	315	16.375	1.005
1250	315	16.386	1.008
1251	315	16.391	0.943
1252	315	16.387	0.891
1253	315	16.373	0.868
1254	315	16.406	0.844
1255	315	16.440	1.278
1256	315	16.505	1.026
1257	315	16.456	0.888
1258	315	16.445	0.902
1260	315	16.510	0.890
1261	315	16.500	0.918
1262	315	16.473	0.872
1263	315	17.073	1.030
1264	315	16.533	0.834
1265	315	16.550	0.946
1266	315	16.608	0.888
1267	315	16.600	0.974
1268	315	16.571	0.962
1269	315	16.590	1.086
1270	315	16.577	0.940
1271	315	16.606	0.906
1272	315	16.623	1.128
1273	315	16.610	0.934
1274	315	16.647	0.852
1275	315	16.741	1.026
1276	315	16.727	1.081
1277	315	16.732	0.960
1278	315	17.193	1.078
1279	315	16.793	0.881
1280	315	16.786	1.200
1281	315	16.779	0.867
1282	315	16.842	0.894
1283	315	16.804	0.920
1284	315	16.807	0.918
1285	315	16.947	0.814
1286	315	16.867	0.950
1287	315	16.881	0.998
1288	315	16.892	1.175
1289	315	16.861	1.082
1290	315	16.913	1.026
1291	315	16.887	1.195
1292	315	16.924	1.019
1293	315	16.902	0.907
1294	315	16.928	0.933
1295	315	17.043	1.188
1296	315	16.937	0.968
1297	315	16.991	0.997
1298	315	16.978	1.027
1299	315	16.951	0.857
1300	315	16.982	1.033
1301	315	16.978	1.063
1302	315	17.018	0.945
1303	315	16.956	1.132
1304	315	17.030	1.037
1305	315	17.041	1.113
1306	315	17.071	0.880
1307	315	17.057	0.975
1308	315	17.167	0.988
1309	315	17.076	1.044
1310	315	17.088	0.987
1311	315	17.105	1.234
1312	315	17.110	0.987
1313	315	17.130	0.891
1314	315	17.166	0.989
1315	315	17.143	1.142
1316	315	17.148	1.020
1317	315	17.209	1.064
1318	315	17.206	0.939
1319	315	17.934	1.231
1320	315	17.267	1.119
1321	315	17.241	0.986
1322	315	17.273	0.984
1323	315	17.274	1.383
1324	315	17.292	1.051
1325	315	17.259	0.944
1327	315	17.292	1.087
1328	315	17.293	1.056
1329	315	17.315	1.237
1330	315	17.324	1.120
1331	315	17.683	1.065
1332	315	17.458	1.186
1333	315	17.409	1.181
1334	315	17.444	1.310
1335	315	17.440	1.247
1336	315	17.401	1.002
1337	315	17.450	1.029
1338	315	17.444	1.038
1339	315	17.487	1.219
1340	315	17.493	0.969
1341	315	17.471	1.021
1342	315	17.468	0.988
1343	315	17.718	1.188
1344	315	18.092	1.044
1345	315	17.537	1.093
1346	315	17.536	1.163
1347	315	17.510	0.912
1348	315	17.540	1.021
1349	315	17.537	0.939
1350	315	17.546	1.046
1351	315	17.649	1.103
1352	315	17.561	1.127
1353	315	17.636	1.078
1354	315	17.601	1.106
1355	315	17.610	1.083
1356	315	17.604	1.264
1357	315	17.622	1.043
1358	315	17.654	1.032
1359	315	17.637	1.075
1360	315	17.613	0.771
1361	315	17.630	0.636
1362	315	17.676	1.210
1363	315	17.682	1.177
1365	315	17.689	1.041
1366	315	18.169	0.786
1367	315	17.701	1.102
1368	315	17.709	1.065
1369	315	17.779	1.043
1370	315	17.786	1.244
1371	315	17.751	1.010
1372	315	17.782	1.433
1373	315	17.803	1.415
1374	315	17.824	1.192
1375	315	17.829	1.147
1376	315	17.900	1.109
1377	315	17.853	1.300
1378	315	17.965	1.026
1379	315	17.824	1.027
1380	315	17.825	1.043
1381	315	17.810	1.296
1382	315	17.831	1.309
1383	315	17.856	1.176
1384	315	17.848	1.236
1385	315	17.891	1.161
1386	315	17.962	0.770
1387	315	17.899	1.146
1388	315	17.925	1.045
1389	315	17.917	0.956
1390	315	17.919	1.215
1391	315	17.920	1.186
1392	315	17.965	1.155
1393	315	17.944	1.192
1394	315	17.922	1.102
1395	315	17.932	1.007
1396	315	17.946	0.955
1397	315	17.934	0.925
1398	315	18.042	0.959
1399	315	17.999	1.332
1400	315	17.957	0.906
1401	315	18.107	1.333
1402	315	18.065	1.048
1403	315	18.051	1.126
1404	315	18.050	1.314
1405	315	18.109	0.966
1406	315	18.070	1.333
1407	315	18.213	0.656
1408	315	18.107	0.806
1409	315	18.126	1.300
1410	315	18.142	0.995
1411	315	18.095	0.969
1412	315	18.111	0.958
1413	315	18.164	1.221
1414	315	18.198	0.916
1415	315	18.355	1.345
1417	315	18.157	1.238
1418	315	18.229	1.083
1419	315	18.250	1.251
1420	315	18.229	1.545
1421	315	18.218	0.925
1422	315	18.224	1.193
1423	315	18.216	1.088
1424	315	18.335	1.377
1425	315	18.186	1.180
1426	315	18.401	1.203
1427	315	18.256	1.476
1428	315	18.223	1.535
1429	315	18.293	1.463
1430	315	18.299	1.283
1431	315	18.427	1.259
1432	315	18.303	1.052
1433	315	18.314	0.944
1434	315	18.351	1.750
1435	315	18.346	0.938
1436	315	18.320	0.904
1437	315	18.383	1.028
1438	315	18.951	0.965
1439	315	18.379	0.961
1440	315	18.411	1.288
1441	315	18.446	1.148
1442	315	18.436	1.314
1443	315	18.438	0.904
1444	315	18.464	1.217
1445	315	18.489	1.144
1446	315	18.500	1.197
1447	315	18.456	1.215
1448	315	18.489	1.052
1449	315	18.582	1.081
1450	315	18.459	1.299
1451	315	18.490	1.269
1453	315	18.492	1.197
1454	315	18.578	1.252
1455	315	18.479	1.250
1456	315	18.713	1.311
1457	315	18.559	1.329
1459	315	18.604	1.227
1461	315	18.546	1.402
1462	315	18.603	1.466
1464	315	18.578	0.928
1465	315	18.674	0.894
1466	315	18.655	1.097
1467	315	18.645	1.270
1468	315	18.717	1.217
1469	315	18.681	0.956
1470	315	18.763	1.276
1471	315	18.682	1.020
1472	315	18.840	1.186
1473	315	18.671	1.630
1474	315	18.743	1.282
1475	315	18.700	0.828
1476	315	18.708	1.005
1477	315	18.926	1.376
1478	315	18.705	1.544
1479	315	18.737	1.363
1480	315	18.748	0.915
1481	315	18.736	1.054
1482	315	18.754	1.029
1483	315	18.765	1.144
1484	315	18.965	1.141
1485	315	18.842	1.404
1486	315	18.777	1.753
1487	315	18.768	1.119
1488	315	18.916	0.967
1489	315	18.799	1.196
1490	315	18.792	0.849
1491	315	18.857	1.468
1492	315	18.906	1.311
1493	315	18.856	1.496
1494	315	18.861	1.810
1495	315	18.826	1.142
1496	315	18.883	1.346
1497	315	18.850	1.346
1498	315	18.854	1.402
1499	315	18.907	1.661
1501	315	18.939	1.249
1502	315	18.959	1.553
1503	315	18.858	1.364
1504	315	18.899	1.415
1505	315	18.922	1.126
1507	315	18.943	1.611
1508	315	18.996	1.495
1509	315	19.014	1.215
1510	315	18.977	1.165
1511	315	19.060	1.141
1512	315	18.994	1.380
1513	315	19.172	1.094
1515	315	19.042	1.226
1516	315	18.992	1.003
1517	315	19.176	0.737
1518	315	19.083	1.376
1519	315	19.227	0.944
1520	315	19.160	1.300
1521	315	19.076	1.297
1522	315	19.104	1.752
1523	315	19.087	1.006
1524	315	19.135	1.257
1525	315	19.156	1.451
1527	315	19.136	1.233
1530	315	19.130	1.085
1532	315	19.199	1.123
1533	315	19.246	1.433
1534	315	19.219	0.863
1536	315	19.233	1.037
1537	315	19.265	1.159
1540	315	19.218	1.290
1541	315	19.349	1.036
1544	315	19.319	1.581
1545	315	19.160	1.444
1546	315	19.288	1.422
1547	315	19.316	1.254
1548	315	19.362	1.073
1549	315	19.457	1.100
1550	315	19.383	1.580
1551	315	19.276	1.032
1556	315	19.324	1.250
1557	315	19.429	1.328
1558	315	19.396	0.899
1559	315	19.396	1.256
1561	315	19.392	1.560
1562	315	19.388	1.060
1563	315	19.407	0.955
1564	315	19.367	0.910
1565	315	19.404	1.198
1566	315	19.341	1.800
1567	315	19.358	1.018
1570	315	19.515	1.009
1571	315	19.457	1.029
1579	315	19.387	1.247
1580	315	19.539	1.514
1581	315	19.543	1.130
1583	315	19.476	0.977
1584	315	19.493	0.777
1585	315	19.518	1.013
1587	315	19.484	0.907
1588	315	19.565	0.784
1591	315	19.460	0.863
1593	315	19.571	0.907
1594	315	19.483	0.803
1599	315	19.654	0.804
1603	315	19.684	1.234
1604	315	19.678	0.867
1608	315	19.629	0.932
1623	315	19.746	1.344
1633	315	19.906	0.708
1636	315	19.807	1.061
1637	315	19.880	0.874
1642	315	19.930	0.912
1646	315	19.998	0.809
1662	315	20.119	0.621
1701	315	16.603	0.869
1704	315	17.416	1.163
1708	315	16.834	1.096
1713	315	16.887	0.983
1715	315	16.879	0.978
1716	315	16.800	1.049
1719	315	18.676	1.020
1724	315	19.518	0.995
1903	315	18.369	0.866
1904	315	18.158	0.960
1910	315	18.425	1.007