It's interesting finding info on the web! Tracking down this research is kinda fun ...
The photos are taken by a webcam above Mt. Wilson Observatory, in the San Gabriel Mountains just outside Pasadena, CA.
From the sunrise, we can tell the camera is pointed roughly southwest.
Just to orient you, mapquest has a good roadmap of how it's laid out (
link here).
It also has a satellite photo of exactly the same region, available (
link here).
From their own website at
http://www.mtwilson.edu/General/ the coordinates of the observatory are
Longitude: 118 degrees, 03.6 minutes West
Latitude: 34 degrees, 13.0 minutes North
Elevation: 1742 meters
Putting these coordinates into
http://aa.usno.navy.mil/data/docs/RS_OneDay.html we get:
Quote:Sun and Moon Data for One Day
The following information is provided for Mt Wilson (longitude W118.1, latitude N34.2):
Monday
26 May 2003 Universal Time - 8h
SUN
Begin civil twilight 04:15
Sunrise 04:44
Sun transit 11:49
Sunset 18:55
End civil twilight 19:24
MOON
Moonset 14:09 on preceding day
Moonrise 02:28
Moon transit 08:43
Moonset 15:05
Moonrise 02:53 on following day
Phase of the Moon on 26 May: waning crescent with 16% of the Moon's visible disk illuminated.
Last quarter Moon on 22 May 2003 at 16:31 (Universal Time - 8h).
So at 4:44am in the photo, the moon would be 2 hours, 16 minutes after rising, and still 3:59 hours before it's highest point.
(That's means about one third of it's way up off the southeast horizon).
16% of the moon would be illuminated.
Exactly three months (moonths?) later the image appears again, near the same location and time!!
On this day, at 5:04am the moon would again be one third of it's way up from the horizon, but only 4% illuminated -- a bit smaller and closer to the sun.
Quote:Sun and Moon Data for One Day
The following information is provided for Mt Wilson (longitude W118.1, latitude N34.2):
Monday
25 August 2003 Universal Time - 8h
SUN
Begin civil twilight 04:55
Sunrise 05:21
Sun transit 11:54
Sunset 18:28
End civil twilight 18:54
MOON
Moonset 16:58 on preceding day
Moonrise 02:57
Moon transit 10:23
Moonset 17:41
Moonrise 04:02 on following day
Phase of the Moon on 25 August: waning crescent with 4% of the Moon's visible disk illuminated.
New Moon on 27 August 2003 at 09:26 (Universal Time - 8h).
From the sunrise in the photos, we can tell the camera is pointed roughly southwest, but we have no idea how many degrees width it covers. We would have to get the model of the webcam (over 90% of them are sold by X10.com) or we'd have to identify some of the stars in the photos to measure the angles in the photos.
When the moon is full it is opposite from the sun, directly west as the sun rises in the east (and therefore outside the view of this webcam).
With only a small percentage of the moon illuminated, it would naturally be very close to the sun.
According to this data, on these dates and times we would expect to see the moon
1) just before the sunrise,
2) very close to the sun,
3) directly in view of this webcam,
4) about one third of it's way up off the horizon.
Has the large white orb been seen once every month on this webcam?
That might be good further investigation.
I'm not concluding anything, just presenting some information for us to consider. We should be aware of where the moon is.