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2021-07-19

Jupiter July 17, 2021_2

Jupiter 2021-07-17 (UT) 45cm reflection ASI224MC IR / UV cut ADC 5x barlow

2021-06-20

Milky Way from the garden

2021-06-18 A galaxy in the seat that can be seen from the garden. The rainy season, its wonderful transparency, and the beautiful Milky Way.

2021-05-22

Completed the thermometer with additional fan modifications (two 8 cm fans on the cylinder tip, one 5 cm fan on the cell side, two 8 cm fans) to stabilize the C14 in-cylinder airflow and mirror temperature. .. The 8 cm USB fan, which can adjust the fan speed, has less vibration, so the wind power seems to be weak. I want to see Jupiter when it’s clear sky!

2021-05-17

Behind the reflector

The rainy season doesn’t clear up and I can’t watch the stars. So, I am remodeling the C14 fan I made earlier. It’s been more than ten years since I removed the primary mirror from the cylinder. The back side of this ingot mirror is amazing, and the rib structure is well made. The center of the mirror is thick, the edges are thin, and the structure with less distortion is perfect!

2021-05-11

Milky Way from Nasu

2021-05-10 From the teahouse parking lot at Mt Nasu PassIn the strong wind, I was shown M51 and M20 by my fellow star 51cm Dobsonian. The back of the M51 was dark, so I could clearly see the two arms and see the best nebula. The equatorial mount installed in a ridiculously strong wind was dangerous, but it was a wonderful Milky Way from Cygnus to Cygnus, which I could see after a long time. Probably since I saw it in Jododaira when I was young!Milky Way data 2021-05-10 24mm. 85mm 105mm, 300mmSony-α7s (IR modification) UV / IR cut ISO3200 20-30 seconds (3-10 images combined)

2021-05-06

The Two Comets

C/2020 R4 Atlas 2021-05-03 21:07(JST) A tail is visible as if it were a comet. C/2020 T2 Palomar 2021-05-03 21:17(JST) Vertical noise is present.

2021-04-27

Jupiter April 24, 2021

Jupiter 　2021-04-24 (UT) Jupiter at dawn has reached an observable height. The altitude in the south and middle is as low as 41 ° this year, but I want to be blessed with good airflow. On the Jupiter surface, the density of redness is high from NEB to EZc, and they are connected in the UV image. SEB is faint depending on longitude. CH4 (methane band) filter changed to ZWO. I would like to expect a short exposure of 100-150ms.

2021-04-23

Veil Nebula April 23, 2021

Veil Nebula 2021-04-23 　45 cm F/4 Newtonian I took a picture of the Veil Nebula (Veil Nebula, NGC 6992-5, NGC 6960) before observing Jupiter. Since it is a large diffused nebula, it is a part of the field of view, but it is a beautiful color of red, blue . Weak image processing suppresses contrast and adjusts to gentle colors. It was a low altitude image in the twilight, but next time I would like to take it at the zenith position! The bright eastern side is NGC 6992-5 (C33) and the western side is NGC 6960 (C34), and it is thought that the gas of the supernova remnant that exploded tens of thousands of years ago is spreading at 100 km / s (Wikipedia (Wikipedia)

2021-04-23

Video M8

Video M8 2021-04-21 Seeing condition was poor, but the transparency was good, so I took a video of the Lagoon Nebula in Sagittarius (ISO102400, 1/4 second)（with BGM). The camera of the IR modified has a high sensitivity of red, and it looks better than it looks visually. It is an image without color with the UHC filter. The change in atmospheric fluctuations and the feeling of passing artificial satellites are the expressive power of movies!

2021-04-16

C / 2020 R4 ATLAS Comet April 15, 2021

C / 2020 R4 ATLAS 2021-04-15 03:04 (JST) 45cm F4 Newtonian　30s exposure x 4 sheets It became transparent after the rain. The airflow is bad and the stars image is big.