The Super-Moon in Sep 2014


Date & Time: Sep 9 2014, 22:10 JST(+0900), mosaic of 12 flames
Optical: Kasai 20cm(7.9") F6 Newtonian (NERO-200DX) (f=1200mm, F6.0)
Auto-guided with TAKAHASHI EM-200 Equatorial
Camera: CELESTRON Skyris445C with IDAS IR-cut filter
Location: Hitachi city, Ibaraki pref.

Camera Settings: 30 flames/sec.×5sec., Exp....1/180sec
140 flames stacked each & Wavelet process with Registax6



Comparison of the Super-Moon & the farthest full-moon


In 2014, the harvest moon (Chushu-no-Meigetsu in Japanese), one of the traditional harvest festivals in East Asia, was held on Sep 8. In this year the moon passed the perigee on that day, we could observe a bit larger moon for several percent in apparent diameter than that in averaged size. The first image has captured the full moon on next day of the festival.
Recently it has been come to call "the Super-Moon" for the full moon with larger size than ordinary full moon. The Super-Moon is one of terms used in the astrology; actually it has no special means astronomically.
The second image has composed two shots of the moon taken on Sep 9, the full moon in "Super-Moon" state, and Mar 15, two days prior to the full moon, with same equipment. The moon on Mar 15 passed the apogee three days ago, almost equivalent to the farthest full moon. The selenocentric distances from observing point on the Earth of these moons are 355,700km (222,300 miles) and 393,700km (246,000 miles) respectively. These distances have about 9.6% in difference. Although we can hardly recognize the Super-Moon with naked eyes, we can make sure the amount of difference of lunar apparent diameter by comparing those images.



Moon Age 2.6

Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
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