1641+395 (3C 345)
Coordinates
= 16:42:58.808
= +39:48:36.99
(2000)z = 0.5928
Landessternwarte Heidelberg-Königstuhl
Comparison stars
| star | U | B | V | R | I |
| A | 14.66(0.09) | 14.53(0.05) | 13.86(0.05) | 13.44(0.03) | 13.08(0.05) |
| B | 15.10(0.11) | 14.91(0.07) | 14.26(0.06) | 13.84(0.05) | 13.49(0.07) |
| D | 16.54(0.11) | 16.10(0.06) | 15.22(0.06) | 14.80(0.05) | 14.37(0.07) |
| E | 17.66(0.52) | 16.43(0.09) | 15.17(0.07) | 14.51(0.04) | 13.86(0.08) |
Field of view is 15'x15'