ATT Essen.. one week to go!

On Saturday, May 10, 2025, the 40th "Astronomy and Technology Meeting" (ATT) will take place in Essen. The ATT (Astronomie- und Techniktreff) is a trade fair for amateur astronomers and people of all ages interested in astronomy. It is the largest event of its kind in Europe. Here you can admire the latest telescopes and all kinds of accessories, as well as used and do-it-yourself instruments, and exchange experiences with manufacturers and experienced amateurs.

This year some new exhibitors; I'm looking forward to see  ZWO Astro and Proxisky beside the wellknown APP, Bresser, Baader, Celestron, Lunt, Teleskop-Service, Vixen, Explore Scientific, ...

The Sun seen in different wavelengths using Sol'Ex

Using my Sol'Ex I'm able to observe the Sun in different wavelengths. I made a graphics showing my current observations. All observations imaged on May 1, 2025

Setting

TLAPO80/480, Sol'Ex Pro 2nd Gen slit and ASI678MM

Herschel wedge

AZEQ6

Software: Sharpcap, Inti, J'Solex, CS4

Sunspot AR4079

Sunspot AR4079 was imaged this midday with good transparency and moderate seeing. The size is about 1070MH and thus visible with the naked eye (using an eclipse glasses ofcourse).

Setting: TAL200K, ASI290MM with barlow x2

Filters: ND3.8 solar filter, OIII and IR/UV cut filter

Software : Sharpcap, AstroSurface, CS4

The Sun in MgIb2, Alpha and Beta

 

Sunspot AR4079 in CaIIK1v

A new sunspot AR4079 is showing up on the east. Image taken in CaIIK1v line.

Setting: TLAPO80/480 with Sol'Ex Pro 2nd Gen slit and ASI678MM

Herschel Wedge

Seeing : Poor

Tilt: 1° 

Software : SharpCap, Inti, CS4

The Sun April 29, 2025

 

Sun April 28, 2025

Setting
TLAPO80/480 with Sol'Ex pro 2nd Gen Slit and ASI678MM
Herschel Wedge

Tilt <0,8° - Sx/SY=0,9

Software: SharpCap, Inti, CS4