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| The craters Albategnius and Hipparchus on the terminator. 127mm Meade Apo Refractor at f=2250mm - QHY5-11 colour planetary camera stacked video clip. - enlarged detail - Credit Pip Stakkert. |
" The craters Albategnius and Hipparchus being large (129 km and 150 km in diameter respectively) were known to early astronomers such as Galileo and Sir Robert Hooke. Hipparchus is the older of these two impact craters and shows considerable erosion by later impacts. This erosion is particularly noticeable on the western rim. By comparison Albategnius has steep sided walls which rise to 4000 metres on the western side. This feature is recognizable from the long black shadow thrown across the deep crater floor when the Moon is at first quarter. Albategnius has a central peak that rises 1.5 km above the crater floor". - Kurt Thrust acting CEO and current Director of the Jodrell Plank Observatory.
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| Hipparchus - Credit: Lunar Reconnaissance Orbiter |
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| Hipparchus - oblique view - Credit: Apollo 16 |
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| Albategnius - oblique view - Credit Apollo 16 |
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