周年升起、中天与落下时间表： NGC3991
周年可见性图览
NGC3991在 2026-08-18 的可见情况
NGC3991升起与落下时间表
| 时间 | 高度角 | |
月出，照明比例 21%  | 09:49 | 47° |
| NGC3991中天 | 13:20 | 85° |
| 日落 | 17:55 | 34° |
| 民用暮光开始 | 18:24 | 29° |
| 暮光开始 | 18:57 | 23° |
| 天文观测时段开始 | 19:32 | 17° |
| 月落 | 20:26 | 7° |
| NGC3991落下 | 21:14 | |
| 天文观测时段结束 | 02:51 | -17° |
| NGC3991升起 | 05:21 |
跟踪NGC3991整夜的位置变化
← 2026年八月18日 →
| 时间 | |
| 高度角 | |
| 方位角 |
移动星图可更改时间，并观察NGC3991在夜空中的位置变化。
周年升起、中天与落下时间
| 日期 | 升起—落下 | 中天 | 暮光 | 坐标 | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2026-08-17 | 05:25 - 21:14 | 13:20 | 17:52 - 04:24 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-08-24 | 04:58 - 20:46 | 12:52 | 17:43 - 04:30 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-08-31 | 04:30 - 20:19 | 12:25 | 17:33 - 04:36 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-09-07 | 04:03 - 19:51 | 11:57 | 17:23 - 04:41 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-09-14 | 03:35 - 19:24 | 11:30 | 17:12 - 04:47 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-09-21 | 03:08 - 18:56 | 11:02 | 17:02 - 04:53 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-09-28 | 02:40 - 18:29 | 10:34 | 16:51 - 04:59 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-10-05 | 02:13 - 18:01 | 10:07 | 16:40 - 05:05 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-10-12 | 01:45 - 17:34 | 09:39 | 16:30 - 05:11 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-10-19 | 01:18 - 17:06 | 09:12 | 16:21 - 05:18 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-10-26 | 00:50 - 16:39 | 08:44 | 16:12 - 05:24 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-11-02 | 00:23 - 16:11 | 08:17 | 16:04 - 05:32 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-11-09 | 23:55 - 15:44 | 07:49 | 15:57 - 05:39 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-11-16 | 23:28 - 15:16 | 07:22 | 15:51 - 05:46 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-11-23 | 23:00 - 14:49 | 06:54 | 15:47 - 05:53 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-11-30 | 22:32 - 14:21 | 06:27 | 15:45 - 06:00 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-12-07 | 22:05 - 13:54 | 05:59 | 15:44 - 06:07 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-12-14 | 21:37 - 13:26 | 05:32 | 15:45 - 06:12 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-12-21 | 21:10 - 12:58 | 05:04 | 15:47 - 06:17 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2026-12-28 | 20:42 - 12:31 | 04:37 | 15:51 - 06:19 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-01-04 | 20:15 - 12:03 | 04:09 | 15:56 - 06:21 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-01-11 | 19:47 - 11:36 | 03:42 | 16:03 - 06:20 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-01-18 | 19:20 - 11:08 | 03:14 | 16:10 - 06:19 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-01-25 | 18:52 - 10:41 | 02:47 | 16:17 - 06:15 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-02-01 | 18:25 - 10:13 | 02:19 | 16:25 - 06:10 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-02-08 | 17:57 - 09:46 | 01:52 | 16:33 - 06:04 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-02-15 | 17:30 - 09:18 | 01:24 | 16:40 - 05:56 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-02-22 | 17:02 - 08:51 | 00:57 | 16:48 - 05:48 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-03-01 | 16:35 - 08:23 | 00:29 | 16:55 - 05:38 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-03-08 | 16:07 - 07:56 | 00:01 | 17:01 - 05:28 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-03-15 | 15:40 - 07:28 | 23:34 | 17:08 - 05:18 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-03-22 | 15:12 - 07:01 | 23:06 | 17:14 - 05:08 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-03-29 | 14:45 - 06:33 | 22:39 | 17:21 - 04:57 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-04-05 | 14:17 - 06:06 | 22:11 | 17:27 - 04:47 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-04-12 | 13:50 - 05:38 | 21:44 | 17:33 - 04:37 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-04-19 | 13:22 - 05:11 | 21:16 | 17:39 - 04:27 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-04-26 | 12:55 - 04:43 | 20:49 | 17:46 - 04:18 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-05-03 | 12:27 - 04:16 | 20:21 | 17:52 - 04:10 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-05-10 | 11:59 - 03:48 | 19:54 | 17:58 - 04:03 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-05-17 | 11:32 - 03:21 | 19:26 | 18:04 - 03:57 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-05-24 | 11:04 - 02:53 | 18:59 | 18:10 - 03:52 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-05-31 | 10:37 - 02:25 | 18:31 | 18:15 - 03:48 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-06-07 | 10:09 - 01:58 | 18:04 | 18:19 - 03:46 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-06-14 | 09:42 - 01:30 | 17:36 | 18:23 - 03:45 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-06-21 | 09:14 - 01:03 | 17:09 | 18:25 - 03:46 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-06-28 | 08:47 - 00:35 | 16:41 | 18:26 - 03:48 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-07-05 | 08:19 - 00:08 | 16:14 | 18:26 - 03:51 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-07-12 | 07:52 - 23:40 | 15:46 | 18:24 - 03:56 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-07-19 | 07:24 - 23:13 | 15:19 | 18:20 - 04:00 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-07-26 | 06:53 - 22:41 | 14:47 | 18:15 - 04:06 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-08-02 | 06:25 - 22:14 | 14:20 | 18:09 - 04:11 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-08-09 | 05:58 - 21:46 | 13:52 | 18:02 - 04:17 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||
| 2027-08-16 | 05:30 - 21:19 | 13:25 | 17:54 - 04:23 | RA: 11h 57m 31s", Dec: 32° 20' 16s @ 大熊座 | |||||