Un composito che mostra circa tre dozzine di meteori Perseid accumulati in 3 ore di tempo, compressi in un'immagine che mostra il punto radiante del Met
5400 x 3600 px | 45,7 x 30,5 cm | 18 x 12 inches | 300dpi
Data acquisizione:
13 agosto 2021
Altre informazioni:
A composite showing about three dozen Perseid meteors accumulated over 3 hours of time, compressed into one image showing the radiant point of the meteor shower in Perseus. This was August 12, 2021, from The Trail of the Fossil Hunters trailhead lot in Dinosaur Provincial Park, Alberta. A dim magenta aurora is visible to the northeast at left. Cassiopeia is at centre above the radiant point; the Andromeda Galaxy is just right of centre. Capella is rising at left. Airglow also tints the sky. This is a blend of: a single 30-second exposure for the background sky, one with the aurora at its most active, such as it was this night, with a stack of 8 x 30-second exposures for the ground to smooth noise. Then 32 x 30-second exposures for the individual meteors (a couple of frames have two meteors on them) are overlaid with Lighten blend mode onto the base sky image, each with masks to reveal just the meteors. All frames were with the Canon R6 at ISO 6400 and with the TTArtisan 11mm fish-eye lens at f/2.8. The camera was on a static tripod, not tracking the sky, so I hand-rotated all the meteor frames around Polaris at upper left, to bring them into close alignment to the base sky image, so the positions of all the meteors are close to their actual positions in the starfield when they appeared. A couple of exceptions were the meteors at bottom which appeared in Taurus, below the horizon at the time the sky image was taken, so those meteors are moved up artificially. ON1 NoNoise applied to the sky image. Ground illumination is from starlight.
