Image Links | |
Published image | Full resolution |
Annotated image | Full resolution |
Lunar Location | Full resolution |
Target Information | |
Main Target Designation(s) | Mare Nubium, Southern Highland Craters |
Exposures | |
Date(s) of acquisition | 25Jan2018 at 21:32 |
Location | Defiance, MO |
Panel 1 (top-left) | |
L-filtered monochrome | 462 x 2ms at 67% gain (270) |
Video source | 10% of 90" video at 51 fps (avg) |
Capture resolution | 1936x1216 |
Panel 2 (top-right) | |
L-filtered monochrome | 493 x 2ms at 67% gain (270) |
Video source | 10% of 90" video at 54 fps (avg) |
Capture resolution | 1936x1216 |
Panel 3 (bottom-left) | |
L-filtered monochrome | 81 x 2ms at 67% gain (270) |
Video source | 35% of 90" video at 2 fps (avg) |
Capture resolution | 1936x1216 |
Panel 4 (bottom-right) | |
L-filtered monochrome | 486 x 2ms at 67% gain (270) |
Video source | 10% of 90" video at 54 fps (avg) |
Capture resolution | 1936x1216 |
Equipment | |
Imager | ZWO ASI174MM |
Telescope/Lens | Celestron C14 XLT SCT |
Focal Length | 3910mm (f/11) |
Mount | Celestron CGE Pro |
Focuser | Moonlite CSL |
Accessories | |
Focusing | Moonlite V2 Controller |
Software | |
Acquisition | FireCapture 2.5 |
Guiding | None |
Processing | AutoStakkert 3, Registax 6, PixInsight 1.8, Photoshop CC |
This is a promising result from a first-light session at the Astronomical Society of Eastern Missouri's C14, now equipped with a Moonlite CSL focuser, mirror locks, and an ASI174MM camera. Though the atmospheric seeing for this session was typically awful for our region, it was a successful night in verifying the new gear and getting a little data to play with. The fruits of our labor can be enjoyed in the fascinating southern lunar highlands, littered with craters and leading to the real treat of this mosaic - the dramatic plain of the Mare Nubium.
The Mare Nubium, like all the other lunar "seas", was primarily formed as the result of volcanic eruptions and boasts a dark tone from its iron-rich content. Being fairly devoid of craters, this "Sea of Clouds" shows some very interesting small ridges, some of which are categorized as "ghost craters", remnants of craters that have disappeared across a landscape that has since been altered. Some contrast enhancement shows subtle variation in the ground color throughout the plain and reveals some of the hidden beauty of our orbiting neighbor.
Hiking across the Mare Nubium to the southeast, one would eventually be greeted with the unenviable task of scaling through constantly varying terrain and elevation. Countless craters litter the landscape at the lunar south. These include the very prominent crater Tycho, an impact remnant with walls towering nearly 4.5 km in height and impact rays tracing more than 1500 kilometers from it. But even this famous feature is drowned out in a pile of other impacts in this high-resolution photo, some reaching incredible sizes, such as Clavius' 225 km diameter.
The C14's new Moonlite focuser and mirror locks provided immediate improvement over prior sessions with this telescope in the form of more stable focusing. The new ASI174MM camera also boasts larger pixels than my own ASI120MM, a better match for our atmospheric seeing (which is otherwise oversampled by the 120MM). Additionally, the 174MM has a nice, large sensor and much higher framerates via USB3, lending to better opportunities to cut through the jet stream and atmospheric waving. I'm excited to give it another go under slightly better conditions, but for now am thrilled to post a first result and great step forward.