24.Bessel

The eastern part of Mare Serenitatis is criss-crossed by low ridges of hills, the highest ridge, approximately, winds along the 25th meridian.  (Serpentine Ridge) The edge of the Sea of Serenity is darker, and has a number of low rilles. Furthermore on the chart: At the summit of Posidonius Gamma we find a crater of 2km ø.

PROMONTORIUM ARCHERUSIA - Johannes Hevelius named this feature and while doing it made a spelling mistake, it should have been Acherusia ( Ἀχερουσία), in the ancient Geography a cape in Paphlagonia at the Black Sea, now called Baba Burun („Cape Baba“) near Karadeniz Ereğli in what is now Turkey. According to Greek legend there is a  deep chasm at this place, into which Hercules is said to have descended to bring up the dog Cerberus.  

Cape. (41km /24Mi ø ) (Height: 1,500m /4,500ft) (16,79°N, 21,96°E) Isolated peak, the eastern-most point in the Montes Haemus range.

MONS ARGAEUS - Mount Argaeus, (Greek: Ἀργαῖος), the name in antiquity for a 3,960m high strato-volcano  in Cappadocia, now part of Turkey and now called  Erciyes Dağı.

Mountain. (51Km /30Mi ø ) (Height: 2,500m /7,600ft) (19.0°N, 29.0°) Apollo 17 landed near this mountain.

AUWERS - Arthur von Auwers. (1838 - 1915) German astronomer, determined the parallax of the Sun by means of Venus' transits over the solar-disk, and by observing Planetoids, in order to measure the distance from the earth to the Sun more accurately, and therefore be able to calculate the dimensions of the Solar System more accurately and with greater precision. Author of an astrometrical catalogue.

Crater. (20km /12Mi ø ) (Dept: 1,680m /2,900ft) (15.1°N, 17.2°E) Crater, lava flooded, open towards the north.

BESSEL - Friedrich Bessel. (1784 - 1846) German mathematician and astronomer. turned his mathematical skills to problems in navigation. This in turn led to an interest in astronomy as a way of determining longitude. Founder of the observatory of Königsberg. Observation of 75,000 stars. Measuring of the distance to 61 Cygni in 1838. Prediction of the existence of the companion of Sirius.

Crater. (16Km /10Mi ø ) (Dept: 1,740m /5,300ft) (21.8°N, 17.9°E) Circular, bowl-shaped. The rim that has a higher albedo than the floor or the surrounding Mare.

DAWES - William Rutter Dawes. (1799 – 1868) English astronomer. High quality drawings of Mars, extensive measurements of double stars as well as observations of planets.

Crater. (18Km /11Mi ø ) (Dept: 2,330m /7,000ft) (1.7°N, 26°W) Circular, sharp rim, low central rise, darker floor, inner walls steep and free of erosion.

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