| Astronomical Times for Chamberlain Observatory (39.002455, -90.163180) Starting 27 May 2025, for the next 5 days | |||||||
| Date | Morning | Sunrise | Sunset | Evening | Moonrise | Moonset | Moon Phase |
| Twilight | Twilight | ||||||
| 27 May 2025 | 04:06 | 05:37 | 20:18 | 21:47 | 05:38 | 21:37 |  |
| 28 May 2025 | 04:05 | 05:36 | 20:19 | 21:48 | 06:36 | 22:43 | |
| 29 May 2025 | 04:05 | 05:36 | 20:19 | 21:48 | 07:44 | 23:36 | |
| 30 May 2025 | 04:04 | 05:35 | 20:20 | 21:49 | 08:56 | None |  |
| 31 May 2025 | 04:04 | 05:35 | 20:21 | 21:50 | 10:08 | 00:17 | |
| Planetary Data for today | ||||||||||
 |  |  |  |  |  |  |  | |||
| Mercury | Venus | Mars | Jupiter | Saturn | Uranus | Neptune | Pluto | |||
| Rises | 05:30 | 03:37 | 11:08 | 07:04 | 02:49 | 05:15 | 02:49 | 00:27 | ||
| Meridian | 12:44 | 09:57 | 18:04 | 14:24 | 08:42 | 12:20 | 08:46 | 05:06 | ||
| Sets | 19:51 | 16:18 | 01:02 | 21:47 | 14:35 | 19:29 | 14:44 | 09:45 | ||
| Constellation | Taurus | Pisces | Leo | Taurus | Pisces | Taurus | Pisces | Capricornus | ||
| Visible ISS Passes | ||||||||||
 | ||||||||||
| Date | Brightness | Start | Highest point | End | ||||||
| (mag) | Time | Alt. | Az. | Time | Alt. | Az. | Time | Alt. | Az. | |
| 26 May | -2.6 | 20:42:21 | 10° | NW | 20:45:28 | 35° | NNE | 20:48:35 | 10° | E |
| 26 May | -2.2 | 22:19:21 | 10° | WNW | 22:22:07 | 24° | SW | 22:22:08 | 24° | SW |
| 27 May | -3.0 | 21:30:51 | 10° | WNW | 21:34:04 | 43° | SW | 21:35:53 | 21° | SSE |
| 28 May | -3.7 | 20:42:34 | 10° | NW | 20:45:55 | 82° | SW | 20:49:16 | 10° | SE |
| 29 May | -1.3 | 21:32:12 | 10° | W | 21:34:08 | 15° | SW | 21:36:03 | 10° | SSW |