Welcome to the ALPO-Japan

The ALPO-Japan (Association of Lunar and Planetary Observers in Japan) was founded in 1959.

The ALPO-Japan is formed for the observation and research of the planets, and keeps the Planetary Archives of drawings, photographs and images.

What's New

2023/11/19 Revised "New Policy" to main menu

2023/10/22 Added "Restrictions on the use of AI tools"

2022/12/10 Added "New Policy" to main menu

2020/12/27 Added "Rare Event" to the side menu

2019/12/24 ALPO-Japan server system renewed

2019/04/11 Removed "South-up" from our policy

2008/01/20 Renew the TOP page

Submit planetary images to us

We hope that you will send your planetary images to us.

Policy of the Planetary Observation Archive(PDF)

Most of the pages are in Japanese, but you can browse our images with English in the observation pages.

A Brief History of the ALPO Japan

Brief History of ALPO-Japan(PDF)


We Add Policy of the Planetary Observation Archive(PDF)
Important notice from ALPO-Japan planetary archiving database;
 -It is strongly discouraged Artificial Intelligence (AI) tools applied in planetary image processing. 
  AI tools tend to produce artificially looking images where true features are removed
  and unreal features are added to the image.
  Reported images processed with AI tools might be removed from ALPO-Japan database.

Publications - Japanese Astronomical Magazine (only Japanese)

Contact us - Email:@[alpo-info@alpo-j.sakura.ne.jp]@
(remove the leading "@[" and the ending "]@".)

@2008 ALPO-Japan. No images or material contained within these pages may be used without permission of the staff.