Around Jansen Crater

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Date & Time:	Oct 9 1998, 25:01 JST(+0900)
	Composed 3 images (1sec exp. each)
Optical:	TAKAHASHI 12.5cm(4.9") fluorite refractor with Or6mm eyepiece (f=12300mm, F123.0)
	Auto-guided with GOTO MX-II Equatorial
Camera:	VIXEN VX-1
Film:	Kodak KOREIPPON 800
Location:	Ooizumi vil., Yamanashi pref.

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The Jansen, positioned at south east part of moon, has a diameter of 190km and was formed about 4 billion years ago, one of the oldest craters in lunar surface. The Jansen has several satellite craters being piled up and the rim of Jansen has been lost its shape. I took this picture when the terminator approached just above the crater; the interior of Jansen cannot be seen clearly. But you can appreciate a clear valley of Lockyer and microscopic craters.

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Gazetteer

	INDEX	NAME	Crater's Diameter
	1	Jansen	190km
	2	Metius	88km
	3	Vlaq	89km
	4	Pitiscus	82km
	5	Hommel	125km
	6	Stiborius	44km
	7	Piccolomini	88km
	8	Rothmann	42km
	9	Lindenau	53km
	10	Zagut	84km
	11	Rabbi Levi	81km
	12	Riccius	71km
	13	Nicolai	42km
	A	Altai, RUPUS	-

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Southeast region of Moon

Around Serenitatis, MARE

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		Copyright(c) 1999 by Naoyuki Kurita, All rights reserved.
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