A pair of nearly simultaneous and parallel Iridium satellite flares, on October 9, 2017, as they descended into the north. The left or westerly flare was much brighter and with a sharp rise and fall in brightness. While it was predicted to be mag. -4.4 I think it got much brighter, perhaps mag -7, but very briefly. The right flare was predicted to be ,ag. -3.3 which was about correct. These are Iridium 90 (left) and Iridium 50 (right). I used GoSatWatch app to look up the predictions and satellite identities. Several other satellite trails are also in the picture. This is a stack of 40+ exposures each, 2 seconds at 1-second intervals, with the Sigma 24mm lens at f/1.4 and Nikon D750 at ISO 6400.
A magnitude -4 Iridium satellite flare descending toward the northern horizon on October 8, 2017, shot from home in southern Alberta. There are numerous other satellite trails in the frame and at least one aircraft. While predicted to be -7, this flare was more like -4 at best. But the satellite was visible before and after the flare. This was Iridium #13. This is a series of 60+ stacked 2-second exposures at 1-second intervals, with the 24mm lens and Nkikon D750. The glow in the clouds is from Drumheller to the north.
A satellite trail with the satellite tumbling perhaps to provide a pulsating trail as it traveled across the sky from north to south (left to right), varying up and down in brightness. This serve as an illustration of this type of satellite. It might be a spent rocket booster, not a working satellite. Taken as part of a time-lapse and stacking set for the Perseid meteor shower. These frames were shot over 6 minutes. The rising waning Moon is lighting the sky at right. This is a stack of 14 images for the satellite and sky, blended with Lighten mode, and 4 for the ground stacked with Mean mode to smooth noise. Shot from Dinosaur Provincial Park, Alberta, using the Canon 6D Mark II and Rokinon 14mm f/2.5 lens. 25 second exposures at ISO 3200.
