AstronomicalReflexions

The most popular site for astronomy enthusiast in Japan. We will translate and publish the Japanese articles on the original site.

[AstronomicalReflexions @RefAstro]

"Astronomical Reflexions News" has launched! RSS Feeds and Tweets from amateur astronomers, astronomical media, manufacturers and distributors are collected and delivered in an easy-to-read format.
https://t.co/K54GqriiKY

[AstronomicalReflexions @RefAstro]

テストツイートです。#天リフ

[AstronomicalReflexions @RefAstro]

How to see colorful nebulae and star clusters with small equipment. A presentation by Sam, an amateur astronomer from Japan, who gave a talk on "EAA (Electrically Assisted Astronomy)" at CP+2021.
https://t.co/YLVlOkz2A6

[Kennedy Observatory HK97陳死亡 @102Refractor]

戦後の使い方

これらのレンズの中には、アマチュア天文学者が天体写真撮影に使用していたものもあります。

[AstronomicalReflexions @RefAstro]

[New Article] Not GOTO but Navigation. Revolution of Telescope Operating . Navigating with your smartphone. This is a review of Celestron's StarSense ExplorerLT 80AZ.
We will release an English translation of the article as soon as the fav is over 100.
https://t.co/dVjOHYfCvW

[AstronomicalReflexions @RefAstro]

New article: "Dark-Sky Level," a proposed measure of how well the starry sky looks. By changing the astronomical definition of SQM Value="mag/arcsec2" to minus 17, it becomes a convenient and easy-to-understand indicator for the general public.
https://t.co/qskND2H3RB

[Con Stoitsis @vivstoitsis]

Comet C/2020 F3 (NEOWISE) taken by Da Ko in Mexico on the 4th.

[AstronomicalReflexions @RefAstro]

The last work of the author clarifying the existence of "cool pixels" and their effects. Using the fact that noise from natural radiation is always at its maximum brightness value, he compensates for it with a simple operation.
(Japanese) https://t.co/gnRfzxDveM

[AstronomicalReflexions @RefAstro]

Tsutomu Seki talks about 75 years ago. In the shelter, darkness all around,the star that lights up the ground. The Earth is Fire, Eternal Peace in the Sky, Gentle Light is Vega, Roaring Sound, The Stars and Romanticism turned to hell.
https://t.co/BAwhA6DJyO

[AstronomicalReflexions @RefAstro]

Kitamura, Japan's leading mass retailer, opened its flagship store in Tokyo today. Has 7 floors, the upper floors are geared towards more enthusiasts. The camera industry in a slump, but the store is designed to offer a deeper and wider range of enjoyment.
https://t.co/FEJeqmkHvG

[AstronomicalReflexions @RefAstro]

High-sensitivity noise report from the Nikon D6 during astrophotography, with color noise and grid at ISO 200,000 and above. Noise is lower than with the D5. The good thing is that it has been extended to 900 seconds in exposure mode M.
https://t.co/Yam7Ea1rqt

[AstronomicalReflexions @RefAstro]

M57 Ring Nebula. Rare narrow-band images of Ar III (713nm) and He II (468nm). The filter was purchased from EdmundOptics.
https://t.co/Yanf9BPuCi

[AstronomicalReflexions @RefAstro]

A Japanese amateur astronomer had a remote photography session with a friend in Chile. The operation is done using WIndows Remote Desktop function. You can enjoy not only work but also astrophotography by remote control.
https://t.co/iTWZaGxwZO

[AstronomicalReflexions @RefAstro]

This is an amazing way to improve the tracking accuracy of a star tracker, by connecting two units in series and changing their phase by 180 degrees. Shifting and tracking at 1/2 speed. It's a crazy idea, but it's an interesting engineering experiment.
https://t.co/omfWmPaBOi

[AstronomicalReflexions @RefAstro]

The decision was made not to participate in the "Security Technology Research Promotion Program" subsidized by the Ministry of Defense. The National Institutes of Natural Sciences, which consists of nine research organizations, including the NAOJ.
https://t.co/fjV7sXqWbb

[AstronomicalReflexions @RefAstro]

Japan's urban areas are littered with bright streetlights everywhere. This is an example of three boards installed to block out the light. This is not necessarily the norm, but it is a tearful effort to take astrophotography even in urban areas.
https://t.co/O1lSM96WRC

[AstronomicalReflexions @RefAstro]

Japanese style eyepiece case. It is polished in layers with "URUSHI" and compound.
https://t.co/ZHoLXFGlKG

[AstronomicalReflexions @RefAstro]

Whoa! This is a great Venus! A sickle-shaped figure that extends farther than 180° two days before the interior conjunction. This is the glowing Venusian atmosphere. The angle of separation from the sun is only 2.7°.
https://t.co/rTQ3ej2mKB

[AstronomicalReflexions @RefAstro]

Asahi Camera, Japan's oldest photography magazine, is closed for the June issue. Official announcement, the reason is due to a long period of low circulation and a sharp decline in ad. due to COV19. Some of the serials will be continued on the Internet.
https://t.co/p04wyl4EQ7

[AstronomicalReflexions @RefAstro]

The "Harmonic Drive" is especially suitable for driving the DEC axis in terms of high holding power and high signal response, and the modification service to replace the DEC axis of TAKAHASHI's "EM-200" equatorial mount.
https://t.co/62YWMLURLL

[AstronomicalReflexions @RefAstro]

A device to make the polar axis telescope easier to see. An adapter is being produced to attach an angle finder for DSLR cameras.
https://t.co/sXwlh8isrb