Archive for May, 2024
Sun on 5.11.2024 – Cont’d
Posted by jmeriaux in Home, Sun, Uncategorized on May 27, 2024
I managed to capture the Sun this days in Visible Light, Calcium-K Wavelength, and H-Alpha wavelength.
This is the Sun captured in H-Alpha using my William Optics 60mm Refractor, with the Daystar Quark Filter. This is a mosaic of 4 images made from 700 frames each. The Sunspot group (Region 3664 – CR 2884) on the bottom right is very active and emitted large flares. This was taken on 5/11/2024 at 20h16 UTC from Concord, CA.
The same image at the same time, with a Stellarvue SVX 100mm, a Herschel Wedge and a Calcium K filter (Baader Calcium-K 8nm). I am using the same camera as above. The Faculae are more visible on the Sun’s surface. Don’t look at the Sun using such filter as the UV will harm your eyes. This was taken on 5/11/2024 at 19h57 UTC from Concord, CA.
Last, this is the Sun in Visible light . This was taken on 5/11/2024 at 19h26 UTC from Concord, CA. This was taken on 5/11/2024 at 19h43 UTC from Concord, CA.
With the Sun activity almost at its maximum, the Solar spots are spectacular. The Sunspot group below (Region 3664 – CR 2884) is the same group on the bottom right in While Light.
The Instrument was a Stellarvue SVX 100mm with a 2x Barlow. The Camera is an ZWO camera ASI 290MM. This camera is quite sensitive, with Small pixel for high resolution planetary pictures.
Sun on 5.10.2024 with Daystar Filter
The sun was very active this may, with Aurora Borealis seen at very low latitude.
This picture is taken with a 60mm William Optics Telescope with a Chromosphere Daystar Quark Filter. The Chromosphere filter has a dial where the HAlpha wavelength can be tweaker. The visual views are impressive, but a small telescope at F/6 works best because the Daystart Filter has a 4x Barlow integrated, and is optimized for roughly a resulting focal ration of 25.
Visually, the best with this filter and this small Apo is a 25mm eyepiece, to view the entire solar disc.
This is a mosaic of 4 images made from 700 frames each. The Camera used was a ZWO ASI 432MM. Even with a relatively larger frame (17mm), combining multiple images for a complete view of the Sun is needed. This was taken on 5/10/2024 at 19h08 UTC from Concord, CA.
The large solar spot group on the bottom right is the region 3664 (Carrington Rotation 2284).
The details on region 3664 below was captured using the same settings, with a ZWO ASI 290 MM camera which has a much smaller pixel size (but also a much smaller sensor). This was taken on 5/10/2024 at 19h021 UTC from Concord, CA.
Astrophotography in Urban Environment 