+ Reply to Thread
Results 1 to 2 of 2

Thread: A Lunar Transit

  1. Link to Post #1
    Solar Dynamics Observatory (automated reports) SDO's Avatar
    Join Date
    26th December 2010
    Posts
    539
    Thanks
    0
    Thanked 0 times in 0 posts

    Default A Lunar Transit

    Today the Moon passed between SDO and the Sun from 1331-1556 UTC (8:31-1056 am ET). At 2.5 hours in length, it was the longest lunar transit so far in the SDO mission.
    You can watch the transit using the browse data option on our website. Use the times 2014-01-30 00:00:00 and 2014-01-30 17:00:00 and your favorite wavelength to enjoy the show.
    Here is an image from 2014-01-30 14:29:12 in the AIA 171 passband. If you watch the movie you will see the Sun move a little bit during the transit. This transit covers a lot of the solar disk and blocks the sunlight from SDO. The fine guidance systems on AIA and HMI can't work because they need to see the whole Sun to keep the images centered from exposure to exposure. Once the transit is over the fine guidance systems started back up, giving us steady images of Sun.
    And, as the Moon left SDO's field of view, an M8 flare erupted in AR 11967.

    More...

  2. Link to Post #2
    United States On Sabbatical
    Join Date
    14th October 2013
    Location
    Here I am
    Age
    63
    Posts
    1,324
    Thanks
    5,253
    Thanked 3,602 times in 1,157 posts

    Default Re: A Lunar Transit

    Beautiful. It is the second new moon this month-a black moon. (As the second full moon in the same month is a blue moon, a second new moon is called a black moon).

  3. The Following User Says Thank You to Fairy Friend For This Post:

    watchZEITGEISTnow (31st January 2014)

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts