All posts by Star Hunter

Color Moon, November 8, 2019, 19:39

I tested the ZWO ASI183 MC color camera on the moon. The main task was to highlight the color of the moon. I added saturation to the result of stacking without deconvolution, then converted it to the Lab system and used the stack without deconvolution converterd in monochrome as L-channel.

Цветная Луна, 8 ноября 2019 года, 19:39

Color Moon, November 8, 2019, 19:39

-telescope Sky-Watcher BKP150750
-mount Celestron NexStar SE
-Baader MPCC
-filter ZWO IR-cut
-camera ZWO ASI183 MC (2656х2954@30fps).
Stacking 100\500 frames from 3634 with Autostakkert.
Location: Russia, Anapa, backyard.

Svbony UHC 1.25″ filter review

I got Svbony UHC 1.25″ astronomical filter for test. The purpose of the UHC (Ultra High Conrtast) filter is to improve the visibility of gas nebulae. The “real” UHC filter should only pass H-beta lines (486.1 nm) and an OIII doublet (495.9 and 500.7) nm). The UHC filter is not designed to observe objects of stellar nature (galaxies, star clusters), as well as the Moon and planets.

The declared graph shows that the filter has too wide a passband for the UHC filter. This is typical of cheap UHC filters. It also transmits light in the red region, however, it can be useful for shooting hydrogen nebulae in urban light conditions.
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On November 11, 2019 at 12:35 UTC, an interesting and rare phenomenon will occur – the transit of Mercury across the disk of the Sun. At this time, Mercury will be between the Sun and the Earth, and when viewed from Earth, it will be visible as a small dark circle against the background of the Sun. The first touch will be at 12:35. After one and a half minutes, the entire disk of Mercury will go to the Sun and pass through the entire disk of the Sun. Transit will end at 18:04.

Visibility conditions
Just the beginning: Eastern Europe, the CIS, European Russia, Scandinavia, the Middle East.
Beginning and middle: Western and Central Europe, Africa.
Fully: South America, Central and Northeast America, Southern Greenland and West Africa.
Mid and end: most of North America (except East), New Zealand, Polynesia.
Unavailable for observation: Ural, Siberia, Asia, Far East, Indonesia, Australia, most of Alaska and Greenland.
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