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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.

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