Saturday (21-December-2024) — New Jersey

Ten-Years Ago Today. Magellanic Penguins (Spheniscus magellanicus) on New Island. (21-Dec-2014, Falkland Islands)

Winter Solstice Walkabout after the Snowstorm.

The snow ended and the sky cleared soon after sunrise. I set up the telescopes to observe the sun then went for a walkabout around the yard. The snow was a light powder that I was able to easily clear the driveway with a leaf blower. The tractor and the snow blower are ready but weren’t needed this time.

Images taken with a Hasselblad X2d camera and 38 mm f/2.5 lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Comet C/2023 A3 (Tsuchinshan–ATLAS)

The comet is getting fainter and the tail much shorter. You may need to look closely; the comet is in the center of the frame. The magnitude is now 10.9. The slideshow displays the 32nd, 64th, 128th, and 256th stacked composite image (5 min 20 sec, 10 min 40 sec, 21 min 20 sec, 42 min 40 sec). In the last two images there is some movement of the comet head. 

Comet C/2023 A3 (Tsuchinshan–ATLAS). Images taken with a Vespera-Pro Telescope (250 mm, f/5, composites of 10 sec exposures). Individual images in the slideshow are available in my PhotoShelter Gallery

Wednesday (18-December-2024) — New Jersey

Four-Years Ago Today. American Crow feeding on a cold day. (18-Dec-2020, New Jersey).

Silhouettes of Jets Passing in Front of the Sun.

Today, I captured images of jets transiting the sun while looking at the sunspots (we are at or near the solar maximum). I was observing the sun with a Vespera Classic and a Vespera Pro telescope fitted with a solar filter. The exposure time for solar observations with the Vespera Classic telescope is 250 microseconds (1/4000 sec) and with the Vespera Pro telescope is 1400 microseconds (1/714 sec). The Vespera Classic takes 51-52 solar images per minute and the Vespera Pro takes 8-9 solar images per minute.

The same jet appears in the first two Vespera Classic images showing the distance it traveled in ~1.2 seconds. The third image from the Vespera Pro shows a jet with condensation trails. Even though the exposure time is longer (1400 vs 250 microseconds) the image of the jet is still relatively sharp.

Silhouette of a jet transiting the sun with sunspots. Image taken with a Vaonis Vespera Classic Telescope (200 mm, f/4, 1/4000 sec) with a solar filter.
Silhouette of a jet transiting the sun with sunspots. Image taken with a Vaonis Vespera Classic Telescope (200 mm, f/4, 1/4000 sec) with a solar filter.
Silhouette of a jet transiting the sun with sunspots. Image taken with a Vaonis Vespera Classic Telescope (200 mm, f/4, 1/4000 sec) with a solar filter.
Silhouette of a jet transiting the sun with sunspots. Image taken with a Vaonis Vespera Classic Telescope (200 mm, f/4, 1/4000 sec) with a solar filter.
Sun with sunspots and the silhouette of a jet. Image taken with a Vaonis Vespera Pro Telescope (250 mm, f/5, 1/714 sec) with a solar filter.
Sun with sunspots and the silhouette of a jet. Image taken with a Vaonis Vespera Pro Telescope (250 mm, f/5, 1/714 sec) with a solar filter.