Monday, March 12, 2018

20180312 Sun

The cold front is weakening, and the temperature is getting up.  Moderate seeing at 5/10 and transparency dropped, I would say 4/10.

Featureless solar disc, an active region might form at the lower part of the solar disc?

0620 (UT).

Friday, March 09, 2018

20180309 Sun

A cold front came last night and temperature dropped sharply, windy and poor seeing.

0713 (UT), Ranger with reducer, Solarmax 60 + BF10, ASI 120mm

Monday, March 05, 2018

20180305 0559 (UT) Sun in H-alpha

It's a cloudy day, feels like summer in terms of temperature, humidity and the sky condition.

Due to the amount of cloud, I would rather upload the video clip rather than to stack the frames.  Just to let me glimpse the surface features.

Wednesday, January 31, 2018

20180131 Total Lunar Eclipse (Blue Moon)

We have a blue moon tonight, and we have a total lunar eclipse at the same time.

Taken at 9:26pm (GMT+8)

And another one at 9:34pm (GMT+8)

Cloud moving around, we hardly got some small gaps for imaging.

I only got a simple tripod:

It was really cold and windy, and the feeling was great.  If I had more time, I will probably be using a tracking mount plus a higher power setup.  And also my Canon 18x50 IS, too!  Anyway, it's good enough to have some fun. 

Thursday, January 18, 2018

20180118 Sun, tweaking parameters of ASI 120mm

Seeing rather bad at 3/10, transparency very low with pollutant at 3/10.

Got some more time to tweak the settings of the ASI 120mm camera.  I never really studied enough for this little camera, today I switched on the high speed mode, and adjusted Turbo USB to 100 and I finally got more than 30 fps!  Silly me.

I should have adjusted the gain but I forgot what values did I set.

The first one was taken with my usual setting, at slower frame rate, taken at 0703 (UT).

After tweaking, taken at 0710 (UT) at more than 30 fps (around 32-34 fps), and gain lowered.

I found the contrast slightly better, less noise, etc.  The higher frame rate should freeze the seeing better.

Sharpcap kept the record rather well, gain was reduced from 50 to 40... I believe it could be driven down a bit further.

Thursday, January 11, 2018

20180111 Sun

Day off today and the cold front is still passing, and it turns sunny today.

Poor seeing is expected and thus no fine detail could be resolved, taken at 0639 UT.

There are a few dim filaments around, with an interesting on on top right hand corner, which extends a bit into the dark space as a small hedgerow.

Too lazy to add false color to this relatively featureless one, just a record.

Wednesday, December 20, 2017

20171220 Sun

Got a short break today, took a snapshot under poor seeing.

0753 (UT)