The Association of Lunar and Planetary Observers Lunar Section focuses on the topography of our nearest neighbor in space. It maintains a gallery that contains thousands of images and drawings of the Moon based on the Rükl Atlas of the Moon as well as offering multiple programs that the amateur astronomer can contribute to. The section has a monthly newsletter entitled The Lunar Observer that features lunar articles, drawings, and images from similar-minded lunar amateur astronomers across the globe. Contributors use telescopes of all sizes, from 60 mm to over 1 meter - but most observations are done with small, modest telescopes. We welcome you joining our ranks and contributing to the ALPO Lunar Section to enhance your observing skills and learn from other more experienced observers.
Lunar Blog
Please find below the April 2025 ALPO The Lunar Observer newsletter.
PLEASE CONTACT ME IF YOU CAN NOT OPEN THIS!
Find the April 2025 The Lunar Observer here.
Clear Skies,
David Teske
Coordinator, Lunar Topographic Studies Program
Assn of Lunar & Planetary Observers
Image Spotlight
Equipment: 203mm f/12 Cassegrain using 742nm filter & ASI224MC camera
Clavius, one of the largest crater formations on the Moon, is the subject of the "Focus On" article in the TLO for March 2025. Thanks to ALPO member Sanjin Kovacic of Zagreb, Croatia for this excellent capture of the crater.
Lunar Programs
The A.L.P.O. Lunar Section has several programs targeting specific areas of lunar study. They include:
- Lunar Topographical Studies Program
- Banded Craters Program
- Bright Lunar Rays Program
- Lunar Transient Phenomena Program
- Lunar Meteoritic Impact Program
- Lunar Domes Program
Use the menu item at the top to learn more about these programs and to visit their content.
Monthly Lunar Calendar
| Date (UT) | Event |
|---|---|
| 2025-04-01 21:00 | Moon 0.6º north of Pleiades |
| 2025-04-03 00:00 | Jupiter 6º south of Moon |
| 2025-04-04 00:00 | South limb most exposed -6.8º |
| 2025-04-04 00:00 | Greatest northern declination +28.7º |
| 2025-04-05 02:15 | First Quarter Moon |
| 2025-04-05 19:00 | Mars 2º south of Moon |
| 2025-04-06 00:00 | East limb most exposed +7.2º |
| 2025-04-10 19:56 | Moon at descending node |
| 2025-04-13 00:22 | Full Moon, smallest of 2025 |
| 2025-04-13 02:00 | Spica 0.3º north of Moon, occultation Central and South America |
| 2025-04-13 23:00 | Moon at apogee 406295 km |
| 2025-04-16 23:00 | Antares 0.4º north of Moon, occultation Africa to Australia |
| 2025-04-18 00:00 | North limb most exposed +6.8º |
| 2025-04-19 00:00 | Greatest southern declination -28.5º |
| 2025-04-21 00:00 | West limb most exposed -7.6º |
| 2025-04-21 01:35 | Last Quarter Moon |
| 2025-04-21 06:00 | Pluto 0.7º north of Moon, occultation Antarctica |
| 2025-04-25 01:00 | Venus 2º north of Moon |
| 2025-04-25 02:23 | Moon at ascending node |
| 2025-04-25 04:00 | Saturn 2º south of Moon |
| 2025-04-26 01:00 | Mercury 4º south of Moon |
| 2025-04-27 16:00 | Moon at perigee 357,118 km large tides |
| 2025-04-27 19:31 | New Moon lunation 1266 |
| 2025-04-29 07:00 | Moon 0.5º north of Pleiades |
| 2025-04-30 18:00 | Jupiter 5º south of Moon |