Observation by Chris Hooker: Central rilles, 19th April 2021

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2021 Apr 19 - 20:28

Uploaded

2021 Apr 20 - 20:23

Objects

The Moon

Equipment

254mm F/6.3 Newtonian
5x Powermate
Baader 610nm & IR-cut filters
ZWO ASI174 mono camera

Exposure

25 msec @ F/31

Location

Didcot, Oxfordshire

Target name

Triesnecker

Title

Central rilles, 19th April 2021

About this image

The area west of Mare Tranquilitatis has a fine collection of rilles. On the left are Triesnecker and its complex of narrow rilles, from 0.8 to 1.5 km wide, extending north and south for about 200 km. At upper left is the 220 km long Hyginus rille, the northern part of which contains a chain of collapse pits. This rille may be a collapsed lava tube, and it has been suggested that the crater Hyginus in the middle of the rille was once a volcanic vent from which the lava emerged. The Ariadaeus rille extends to the right hand side of the image, and is a classic example of a graben, in which a block of crust sinks between two fault lines. This rille is about 500 m deep and 7 km wide. Finally, the crater Boscovich at the top of the image also has several rilles crossing its floor.

The area was near the terminator on the 19^th, and the low illumination brought out the rilles clearly.

Files associated with this observation

Triesnecker 19 Apr 21.png (1.8 MB)

Like this image

Bill Leatherbarrow, Ron Arbour, Nick Hewitt, David Basey, Manolo_Rodriguez, Philip Masding, Chris Dole, Martina McGovern, Mike Harlow

Comments

Philip Masding, 2021 Apr 21 - 14:42 UTC

Nice image Chris. I have just uploaded an image I took on the same date also of this area. Looks like both telescopes achieved the same resolution of craters down to about 1km which I think is about 0.5 arcsec so close to the limit expected for a 10" scope. You managed to avoid any ringing in the shadows which I got! Cheers Phil

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