Where Is Tranquility Base?

The brief answer is just to the right of the “peninsula” pointing downwards at upper centre in my shot above. More precisely, it can be seen in this screen shot below, which shows the much enlarged  “peninsula” on the left and Apollo 11 location at dead centre.

1969-07-21 Apollo 11
1969-07-21 Apollo 11 landing site “Tranquility Base”. This is a screen shot from my Sky Safari Pro app on my Ipad. It shows the Apollo 11 site and two unmanned sites.

When Apollo 11 landed in the Sea of Tranquility on 21st July 1969 (20th, US time) the Moon was a waxing 6.0 day crescent, 36% illuminated.

Earlier this month, I took the following image with my wide field astro-camera of a waxing 6.2 day old Moon, 38% illuminated, to show an approximation of how the Moon looked at the time of the lunar landing:

2019-07-08 Moon 5 days ASI071
2019-07-08: Moon at 5 days taken with the wide angle camera. The Sea of Tranquility and the location of the Apollo 11 landing site are at the centre of the image, a short distance below the terminator (the boundary between night and day on the Moon).

The big feature image (top of page) and the three images below were each taken on the following night, with a narrow field astro-camera, when the Moon was 7.3 days old and 49.5% illuminated. The Apollo landing site location is visible in the feature image and the first shot below:

2019-07-09 Moon Sinus Asperitatis & Mares Tranquittatus & Seranitatis
2019-07-09 First Quarter Moon: Mare Nectaris, Sinus Asperitatis, Mare Tranquilitatus & Mare Seranitatis. Mare Tranquilitatus is the dark area (below centre) and if  Tranquilitatus were a clock, then the Apollo 11 landing site would be roughly 10 o’clock. Check against the location app above.

The next two images are totally irrelevant but I thought I would include them because I set the rules here……

2019-07-09 Moon Mare Tranquilitatis & Mare Seranitatitis
2019-07-09 First Quarter Moon: part of Mare Tranquilitatis (left) & Mare Seranitatitis (right).
2019-07-09 Moon Cratered Region
2019-07-09 First Quarter Moon – a heavily cratered region at the terminator.

There have been a lot of tv programmes about the Moon landing recently – and a lot of stuff on social media too. I’m off to a Macarthur Astronomical Society all-day function on Sunday 21st July with seven NASA scientists and a showing of “The Dish” to coincide with the time precisely fifty years after the first boot on the Moon.

After all that, I will have had enough of Apollo to last me another fifty years.



Image acquisition software:  SharpCap.
Image post-processing:  SharpCap    PIPP    Autostakkert    GIMP  .
Cropping:   no.


Telescope: SkyWatcher Esprit  Type: 120ED triplet refractor
Focal: 840 mm F/7 Mount: SkyWatcher EQ6-R Pro
Cam 1 (wide)
Cam 2 (narrow)
ZWO ASI 071 MC Pro
Type: CMOS 28.4mm 16 Mpx
CMOS 6.46mm 2.13 Mpx

Image Ā© Roger Powell


    1. That’s a great shot from Lunar orbit. I wish I could claim the Apollo site was visible on my pic, Jim, I really do!
      It does seem that NASA is heading back to the Moon and I suspect that has been prompted by other nations such as the Chinese going there. Another Space Race?
      I was pleased to see that NASA has said the next person to set foot on the Moon will be a woman.


      1. The site was in you photo, just too small.

        I hope good competition and cooperation.

        Yes, let’s have the women be visible contributors, not hidden figures.

        Liked by 1 person

  1. I always see so clearly and understand. May we all be around to celebrate 100 years of that moon landing


      1. Paul, my images of the Moon were stacked video. I should have stated that more clearly in my post. I don’t claim any serious expertise with this method.


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