Here is a series of eleven lunar photos taken October 15 – November 4, 2010, with the Moon’s apparent angular diameter given in minutes of arc. Each photo may be clicked for a larger version. Explanatory notes follow.
11:56 PM CDT 10-15-10 (4:56 UTC 10-16-10)
29.82′ angular diameter
60mm refractor, 17mm eyepiece
10:25 PM CDT 10-16-10 (3:25 UTC 10-17-10)
29.80′ angular diameter
8″ reflector, 25mm eyepiece
12:04 AM CDT (5:04 UTC) 10-19-10
29.75′ angular diameter
60mm refractor, 17mm eyepiece
11:44 PM CDT 10-19-10 (4:44 UTC 10-20-10)
29.88′ angular diameter
60mm refractor, 17mm eyepiece
5:39 AM CDT (10:39 UTC) 10-21-10
29.76′ angular diameter
8″ reflector, 25mm eyepiece
6:04 AM CDT (11:04 UTC) 10-22-10
29.99′ angular diameter
8″ reflector, 25mm eyepiece
11:50 PM CDT 10-22-10 (4:50 UTC 10-23-10)
30.44′ angular diameter
60mm refractor, 17mm eyepiece
6:19 AM CDT (11:19 UTC) 10-29-10
32.22′ angular diameter
8″ reflector, 25mm eyepiece
6:46 AM CDT (11:46 UTC) 11-1-10
32.92′ angular diameter
8″ reflector, 25mm eyepiece
8:10 AM CDT (13:10 UTC) 11-3-10
33.07′ angular diameter
8″ reflector, 25mm eyepiece
7:20 AM CDT (12:20 UTC) 11-4-10
32.86′ angular diameter
8″ reflector, 25mm eyepiece
The Moon reached apogee close to the time of the 10-19-10 photos, resulting in the smallest angular diameter at that time. The Moon reached perigee close to the time of the 11-3-10 photo, and once again began to recede from the Earth in its elliptical orbit. Perigee is now happening earlier in the lunation than in September and October, when the Moon was approaching perigee while in the thin crescent phase just before New Moon.
Reflector photos were taken with the homebuilt reflector telescope with 8″ mirror and 64″ focal length. Refractor photos were taken with the Meade refractor telescope with 60mm lens and 700mm focal length. As always, they’re all taken with my trusty LG VX8360 cell phone camera. Each photo is to the same scale on this page, but when images are clicked, reflector photos expand to 880×880, refractor photos to 557×557, since the reflector with 25mm eyepiece yields about 65x magnification, but the refractor with 17mm eyepiece yields about 41x magnification.
Observant readers will see that refractor photos are usually around midnight, usually taken “on the fly” after I get home from work, usually while walking the dog! Reflector photos are generally taken either in the early morning or on weekend evenings, much better times for lugging the 95-pound brute around.
I will keep on doing these lunar series posts whenever I can, partly because it’s fun and interesting, and partly to document the fact that, regardless of wild rumors floating around, nothing out of the ordinary is happening to the Moon’s orbit! I lack the sophisticated telescope and photo equipment that some have, but my equipment is plenty powerful enough to document what’s happening up there, and serve as a reality check against sensationalism.
While the earth remains, seedtime and harvest, cold and heat, summer and winter, day and night, shall not cease.
Genesis 8:22 ESV
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