BRIEF DESCRIPTION
A 'continental' area, surrounded by Mare Vaporum, Sinus Medii and Sinus Aestuum. There is a complex system of clefts in the vicinity of the crater Triesnecker. The region contains the landing sites of the probes Surveyor 4 and Surveyor 6.  Refer to your Antonin Rukl lunar atlas chart on page 93.

EARTH-BASED TELESCOPIC IMAGES:
Image - Hyginus (Poyet)
Image - Pallas (Poyet)
Image - Rimae Triesnecker & Hyginus Cidadao)
Image - Rimae Triesnecker, Hyginus and Ariadaeus (Legault)
Image - Sinus Medii (Plate 3-22, Pictorial Guide to the Moon)
Image - Triesnecker, photo (Therin)
Image - Triesnecker, CCD (Therin)
Image - Triesnecker (Jomo)
Image - Triesnecker (Poyet)
Image - Ukert (Ferreira)

LUNAR ORBITER IMAGES:
 Lunar Orbiter Database
Aestuum, Sinus
Blagg, 5.4 km  
Bode, 18.6 km
Bode, Rima
Bruce, 6.7 km
Chladni, 13.6 km
Medii, Sinus
Murchison, 58 km
Pallas, 50 km
Rhaeticus, 43x59 km
Triesnecker, 26 km
Triesnecker, Rima
Ukert, 23 km
Vaporum, Mare

CLEMENTINE IMAGES:
Images - Ukert & Triesnecker (Mike Bara)

RESEARCH UPDATES:
NASA Solves Half-Century Old Moon Mystery (NASA/2003) (Our 1956 Mystery Photo - Lunascan)
AS16-0839(M) - Great oblique shot of Hipparchus looking toward Sinus Medii (SP-362,177)
Best Image of Ukert (Jim Ferreira)
Triesnecker & Rima Triesnecker (Lunascan)
Mosting A - The Story (Lunascan)
Mosting A - The Valley of the "Shard" (Lan Fleming)
The Clem Mosaic Mystery (J.J. Mercieca)
Shard "location" depicted in EBTI prepared by The Lunascan Project
Sinus Medii images by Clementine, made to be "poor"? (Lunascan)
Discussions regarding images of LO3-85m (Lunascan)
Discussions regarding imaging in Sinus Medii (Lunascan)
Apollo 10 Image (4822) of Hygenus Rille (Enterprise Mission)