Comet C/2017 K2 (Panstarrs) near IC4665 Summer Beehive

Last night, June 21, Comet C/2017 K2 (Panstarrs), an Oort Cloud Comet, was observed near IC4665 (Summer Beehive).

Setting : TLAPO80/480 f/6 with ASI2600MC

Lights 5x60s, darks, bias, flats and darkflats

Software : N.I.N.A, Stellarium, APP, CS4, DeNoise AI

Solar Imaging and False Colours when using H-Alpha and CaK filters

As I'm imaging the Sun with a monochromatic camera the result is typically gray. I'd like to add colours when imaging in H-alpha and CaK. This is what I found when using Photoshop (Cs4) :

For H-alpha imaging (page 356 of Solar Astronomy):

Use of levels to change the "midpoint" of each colour RGB and finaly RGB aswell.

R = 1,3 - G = 0.44 - B = 0.2 and RGB =1.8

For Ca-K imaging :

Use "image, adjustments, fotofilter" and adjust RGB colours to 150;33;255

Next change contrast +/-10, colourtone -10 and saturation by +10. Last change histogram with +10/15.

Supergranulation Cells in CaK

My image of Sunspot AR3030, 3032 and 3039 shows some interesting features. Looking near the limb a bright structure is visible, called the chromospheric network. The image shows also some cells of the chromospheric network.

More information was found via this link 

Setting : TAL 200K f/8.5 with ASI290MM and focal reducer x0.5

Filter : Solarfilter ND3.8 and CaK filter

Software : SharpCap Pro, AS3!, IMPPG and CS4

Sunspot AR3030-32-39 in CaK

Imaging Sunspots AR3030, AR3032 and AR3039 in CaK.

Setting : TAL200K f/8.5 with ASI290MM
Filter : Baader ND3.8 and CaK

Software : SharpCap Pro, AS3!, IMPPG and CS4

10 Sunspots Group

A very active sun today with in total 10 sunspots groups.

Setting : TLAPO 80/480 f/6 with ASI290MM and 0.5x reducer.

Solarfilter : Baader ND3.8

Software : SharpCap Pro, AS3!, IMPPG and CS4.
 

Herschel Objects book

Nice surprise yesterday from my collegue Walter which handed me over "The Complete Guide to the Herschel Objects". The book summarizes Sir William Herschek objects. It describes each of the 2435 objects the author filtered down based on errors from the original lists of between 2478 and 2511 objects.

As I'm working the Herschel 400 list, this book is a nice welcome and maybe a future challenge :)

The Grand Tour

Boarding now, a once in a life time getaway.