Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

Solar Activity 22 Mar


brianb
 Share

Recommended Posts

The morning dawned cloudy after overnight rain but a clearance developed during the morning. Sadly it was short lived, heavy showers soon moving in, but I did manage to observe between the front clearing and the arrival of the first shower.

The overview shots show a Sun which is steadily becoming less active.

Sun-100322-1003-CaK.jpg

2010 Mar 22, 1003 UT. Coronado PST CaK @ f/10, DMK41.

Sun-100322-1008-Ha.jpg

2010 Mar 22, 1008 UT. Solarscope 60 @ f/5, DMK41. (Disc and proms exposed seperately)

AR1056 has a medium sized "white light" spot and several spotlets but there is no other activity visible in white light.

Sun-100322-1027-WL-AR1056-FLTX4.jpg

2010 Mar 22, 1027 UT. WO FLT 110 @ f/28, Baader solar film (ND 5.0), DMK21.

AR 1056 is also interesting in CaK and in Ha, where it is enhanced by the persistent filament to its west:

Sun-100322-1034-CaK-AR1056-FLTX2.jpg

2010 Mar 22, 1034 UT. WO FLT 110 @ f/21, Lunt B1200 CaK diagonal, DMK21

Sun-100322-1011-Ha-AR1056-X2.jpg

2010 Mar 22, 1011 UT. Solarscope 60 @ f/24, DMK21

The pair of filaments in the south east sector remain a prominent feature in Ha. Very interesting how the long filament maintains its tight shape in the apparent absence of magnetic activity nearby ... obviously there is a strong magnetic field at the altitude of the filament if not at chromospheric level!

Sun-100322-1010-Ha-filaEC-X2.jpg

2010 Mar 22, 1010 UT. Solarscope 60 @ f/24, DMK21.

Prominences are not remarkable. There is a smallish, low "hedgerow" on the west limb and another on the east limb.

Sun-100322-1014-Ha-promW-X2.jpg

1014 UT. SV60 @ f/24, DMK21

Sun-100322-1015-Ha-promSE-X2.jpg

1015 UT. SV60 @ f/24, DMK21

The largest prominences are actually on the north east limb, though they're pretty faint:

Sun-100322-1016-Ha-promNE-X2.jpg

1016 UT. SV60 @ f/24, DMK21

Transparency very good though with building shower cloud. Seeing fair but with moderate boiling when using the FLT 110. Temperature 11C (dropping to 7C as showers arrived), wind W force 3-4 gusting 5.

Link to comment
Share on other sites

Perhaps a bit OT re. the imaging, but:

Is there a decent book, that goes a little beyond the mere naming of solar features, to explain their possible interrelationships? It must indeed be interesting to at least speculate what's going on in these splendid images... :)

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.