Luna, or the Moon, or Earth I


I don't take pictures of the Moon, by and large, because it is far too bright for comfort and its presence in the night sky makes it much more difficult to see fainter objects. As the saying has it: Blue sky at night, astronomers take fright! However, here is one which has been taken for completeness' sake. The streak of darker coloured terrain across the top of the image is called Mare Frigoris; the roughly circular one to the centre-right is Mare Serenitatis and to its left is Mare Imbrium, on the far-left edge of which is Sinus Iridum. The prominent dark-floored crater on the northern edge of Mare Imbrium is named Plato. To set the scale, Mare Imbrium is roughly the same size as France. At the top right of the image is Mare Humboldtianum, visible here because the libration is favourable. At some librations the Mare is effectively on the far side of the Moon as seen from the Earth.

Image information
Date and time of observation  2019-09-10 00:16 UT
Telescope 0.4m f/6.5 Dilworth-Relay
Camera Starlight Xpress Trius-PRO SX814 CCD
Filter Johnson V
Exposure 30ms.