Posidonius and Mare Serentatis

Posidonius and Northern Serpentine Ridge

Posidonius and Mare Serentatis

With the first clear night in more than one week, I was able to catch the sunset across crater Posidonius (99 km) at the northeastern edge of Mare Serentatis. Posidonius A (11 km.) , the highest of the small central peaks and the tilted and uplifted concentric ridge were the last features catching the light at sunset inside the rim. Also visible and included in this sketch was the northern most portion of Serpentine Ridge. As temperatures were falling throughout the night, I found myself stopping to warm my hands indoors not once but several times. The lunar viewing was excellent this night.

For this sketch I used: black Strathmore 400 Artagain paper, white and black Conte’ pastel pencils and a blending stump.

Telescope: 10 inch f/ 5.7 Dobsonian and 9 mm eyepiece 161X
Date: 01-02-2013: 04:30 – 06:00 UT
Temperature: – 16° C (2° F)
Clear, calm
Seeing: Antoniadi III
Colongitude: 150°
Lunation: 19.83 days
Illumination: 79.6%

Frank McCabe

7 thoughts on “Posidonius and Northern Serpentine Ridge”

  1. Nonostante il freddo hai fatto un gran lavoro, la fatica è stata premiata da un ottimo risultato.

  2. Despite the cold, you did a great job, the effort was rewarded with a good result.
    Sorry but I’m using google translator.

  3. garmau, carvinsc, Christian and Thia,

    Thank you for the nice words and best to you all for clear observing skies.

    Frank 🙂

  4. Hi Frank,

    a very nice sketch – it looks like 3D. I feel last observing evenings with you… the temeratures were quite low ;), but when the air is good, the moon will be one of the best objekt I know.


    CS Uwe

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