LRO PDS Archive Interface) Dale and UT Equivalent Selenographic
Coordinates Oct 30 UT 01:50-02:05 49.5[degrees]W, 24.4[degrees]N Oct 30 UT 01:50-02:05 49.0[degrees]W, 25.3[degrees]N Oct 30UT 01:55-02:05 47.8[degrees]W, 23.1[degrees]N "--" 47.9[degrees]W, 23.3[degrees]N "--" 48.0[degrees]W, 23.5[degrees]N Nov 28 UT 00:45-01:45 47.8[degrees]W, 23.1[degrees]N Nov 28 UT 00:30-01:45 48.0[degrees]W, 23.2[degrees]N Nov 28 UT 00:45-01:45 47.6[degrees]W, 23.0[degrees]N Nov 28 UT 01:09-01:15 49.3[degrees]W, 25.3[degrees]N
A similar observation but with the sun's selenographic latitude in the southern hemisphere would be highly informative in this regard.'
Mean colongitude 227[degrees].4, selenographic latitude +0[degrees].77.
Located at selenographic
latitude 49 [degrees] south and longitude 6 [degrees] east, Heraclitus is best viewed during the Moon's first-quarter or last-quarter phase.
The Plato 'hook', as it is often described, (2) is not readily observed, since its appearance is critically dependent upon a particular combination of selenographic
colongitude, libration and topography.
A more precise way to locate the terminator's position is by the Sun's selenographic colongitude, the Sun's position in its monthly circuit around the lunar sky.
The Sun also moves in lunar, or selenographic, latitude, sometimes standing a little north of the Moon's equator and sometimes south.
The laser altimeter on the Clementine lunar orbiter could not map areas north of selenographic
latitude 70 [degrees], so graze timings are still needed for this purpose.