香港天文論壇

Sun in Cal H and Ha 13/7/2022

Hi everyone,
Took some solar images yesterday and processed them last night and this morning.
Enjoy!

Our Sun today
Taken with Daystar Quark Cal H and Chrom filter
Askar 107PHQ, televue 4x
174mm

My Quark Cal H finally arrives. First light image
FC76D with 1.7x extender. Mosaic of 2.

Our Sun today (19/5/2022), huge prominence eruption appearing in the SE side 07:36 - 08:33 GMT
Takashi 76DCU, televue 4x, Daystar Quark Combo DS PST Etalon, QHY 174mm

Our Sun today 17/5/2022 ~9:25 GMT
Prominences at NNE, NW, SE showing up nicely
Large AR group at NE AR3011, 3014, 3015, 3017

WOW triband!!!!

Our Sun today 6/May/2022
This time I used a tilter and the newton bands are gone

Today I was able to take some more images and I've found the tilter did help a lot. I used to use it, but then I must have understand it wrongly that the flat approach using thin plastic bag would make all the corrections - and I was wrong. I will post today's result later..

A few shots on the Sun today Yet the newton ring patterns are a little bit difficult to get rid of. I tried tilter, also Firecapture flat. but the pattern seemed to be on the chip and no matter which angle I rotate the camera, the patterns are the same. 2022-05-04-0742_5-U-L-Sun_Halpha_pipp_lapl4_ap...

AR12978 & AR12981

C8 - 540nm filter + asi294mm