Click here for an image showing the names of features (282 Kb)

 

 

The Details
Object
Aristoteles and Eudoxus region
Optics
Astro-Physics 175 EDF refractor at f/8.3 + Televue 2x Powermate
Platform
Astro-Physics 1200 GTO
Camera
Point Grey Grasshopper2 GigE mono video camera
Filters
None
Date
24 June 2015
Location
Palomar Mountain, Eastern San Diego County, California
Software
FlyCapture, Registax5, Photoshop CS5
Notes
This image of the Aristoteles/Eudoxus region of the Moon contains some interesting features, including:

Valles Alpes, a 180 km long canyon cutting across the width of the Montes Alpes.  Close examination of Valles Alpes reveals a hint of the narrow rille running parallel to it along its floor.

Mons Blanc, a peak rising about 3.8 km above the floor of Mare Imbrium.  Unlike its earthly counterpart, Mont Blanc in the Alps, Mons Blanc is not the highest peak in the range.  It’s the third tallest peak, with the highest towering 600 m higher than Mons Blanc.

Montes Caucusus is a 520 km long northern extension of the Montes Appenninus range to the south, separated from the latter by a 50 km plain linking Mare Imbrium to Mare Serenitatis.  The highest peak in the Montes Caucusus lies just west of the crater Calippus and rises to a height of over 6 km above the level of the surrounding maria.   That’s over 19,500 feet in height and slightly more than the relief of North America’s highest peak, Denali, from base to summit, which is the greatest rise of any mountain on Earth entirely above sea level.

Craters Aristoteles and Eudoxus, 87 km and 67 km in diameter respectively, with their beautifully terraced walls.  Emanating most prominently on its northern side of Aristoteles a radial pattern of ejecta can be seen blending into the flat plain of Mare Frigoris.

Crater Aristillus, a prominent ray crater 55 km in diameter with a depth of 3650 feet from rim to floor, also shows the same radial ejecta pattern as Aristoteles.  The three peaks in the center of Aristillus rise to a height of about 900 m above the crater floor.  Directly north of Aristillus is a “ghost” crater with only the very top of its rim still visible.  This crater has been slowly buried by the ancient lava flows of Mare Imbrium.

The various rimae, each having an average width of about 2 km.  Carving a path through the smooth basaltic lava flows of Lacus Mortis (Lake of the Dead), Rimae Berg I and II are highlighted against the darker surface.  Rimae Berg II is actually a rille-fault, a feature which is subtly detected due to its western shadowing in the image.  Rille or Rimae are long, narrow depressions on the lunar surface resembling water courses.

The fanciful names given to the darker, smoother regions of the lunar landscape by 15th century Italian astronomer Giovanni Riccioli.  Mare Frigoris , the Sea of Cold, is the most northerly of all mare on the Moon.  Mare Imbrium, the Sea of Showers, is the largest mare in terms of area and second only to Oceanus Procellarum.  Mare Serenitatis, the Sea of Serenity, a name that belies its turbulent past.  And finally Lacus Somniorum, or Lake of Dreams, the irregularly-shaped northern “bay” of Mare Serenitatis.

The Moon phase at the time of this image was 57.29%.

 

 

 

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