The full array of northern winter stars and constellations, including Orion, setting in the evening twilight at Dinosaur Provincial Park, Alberta, on April 20, 2021, so about the last opportunity to shoot the scene for the season. Light from the waxing quarter Moon just off frame at top illuminates the scene, plus the sky is still bright with twilight colours in the west. Orion is just all visible but with Rigel about to set. The Hyades and Pleiades in Taurus are just over the formation at right. Sirius in Canis Major is over the formation at left. Procyon in Canis Minor is at left of centre. Castor and Pollux in Gemini are the two stars at top. Capella in Auriga is at upper right. Perseus is at far right. Mars is dim at centre frame as an "extra star" between Gemini and Auriga. This is a stack of 4 x 30-second tracked exposures for the sky at ISO 800 and 4 x 1-minute untracked exposures for the ground at ISO 200, at f/4 with the 14mm Samyang SP lens on the Canon EOS Ra camera. The tracker was the Star Adventurer 2i. This is not a multi-segment panorama but is a multi-exposure stack. Stacked, masked and blended in Photoshop.
An arc of aurora across the north, taken from home in southern Alberta March 13, 2021 on a night when the STEVE auroral arc appeared about 45 minutes after this was taken whren the main arc shown here had faded. This is a cropped stitch of 9 segments, each 30 seconds at f/2.8 with the Venus Optics 15mm lens and Sony a7III at ISO 1600. Stitched with Adobe Camera Raw.
A 360° panorama of the late winter and early spring sky with an arc of aurora, from a latitude of 51° N. This was March 13, 2021, from home in southern Alberta. This night there was a bright aurora across the northern sky, so I have oriented the view to place due north just right of centre. The Big Dipper is at right; Leo is rising at far right. The bright winter stars around Orion are at far left to the south. High clouds and haze, partly lit by light pollution here, add the natural glows to the stars, emphasizing the bright stars and constellation patterns. No filter was used here. The yellow arch at left is a band of cloud illuminated by light pollution. This was a test of new panorama gear, using an Acratech Pan Head on top of a Alyn Wallace/MSM Z-Plate mounted to a Sky-Watcher Star Adventurer 2i tracker, to allow taking tracked segments for the panorama, to prevent star trailing. The Z-Plate allowed the Pan Head to mount and move horizontally and vertically in azimuth and altitude despite being on a polar aligned tracker. It worked! The ground is a stitch of 8 segments shot with the tracker motor off, then blended with a stitch of 20 segments for the sky, in 3 tiers of 8 + 6 + 6 segments, all with the Sigma 24mm lens at f/2.8 and for 1-minute with the Nikon D750 at ISO 1600 for all shots. Stitched with PTGui v12 which at last saves camera metadata when exporting PSD files. The original is 25,600 pixels wide.
