Aurorae, Noctilucent Clouds and Zodiacal Light

• Aurorae
• Noctilucent Clouds
• Zodiacal Light

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Low Latitude Aurora 2024, May 10/11

• Auroral Glow in Gemini at 02:53 UT. 2 s exposure.
• Rays west of Arcturus (the brighest star at upper-left): 25 s at 06:47 UT. 4 s exposure.
• Green Auroral Rays in Ursa Major at 06:47 UT. 4 s exposure.

Taken from Topsfield, MA, USA (lat 42.6°). Canon 700D DSLR used. Clear areas.

Icelandic Aurora, 29 September 2016

Left: Auroral Arc at 21:29 UT. Boötes is on the left. 15 s exposure.
Right: Bright Auroral Bands, quickly changing, at 21:48 UT. 8 s exposure.

Taken from near Arnes, Iceland. DSLR at a focal length of 18 mm, ISO 800.

Suburban Aurora, August 2015

Aurora, a low arc with rays higher up. No colour visible to the naked-eye. Notice the light pollution from surrounding street lamps. Observed from Rush, Co Dublin.

26^th-27^th August 2015 at 02:45 UT. DSLR at ISO 800. 20 s exposure.

Aurora, March 2012

Aurora, rayed arc with some folds. The green colour was obvious to the naked-eye, despite the full moon. Observed from off south-tip of Greenland at 10600 m.

8^th-9^th March 2012 at 03:17 UT. DSLR at ISO 3200, from a bumpy platform. 2 s exposure.

Great Aurora, November 2003

Auroral Corona at the zenith 20^th-21^st November 2003. Taken from near Kells, Co. Meath with a Nikon 4500 digital camera.

Aurora 2003, October 29/30

• Auroral Rays in Ursa Major at 23:33 UT.
• Auroral Red Rays in Aquila at 00:56 UT.
• Cutains: 25 s at 22:05 UT.
• Rays in Auriga: 27 s at 22:08 UT.
• Striations in Cancer: 25 s at 00:06 UT.

All taken from Oristown near Kells, Co. Meath. The first two images are 8 s exposures, taken with a Nikon 4500 digital camera (at ISO 400). The last three images were taken on Kodak Elite Chrome 200 slide film.

Alaska Aurora, October 2000

The Polar Aurora on 26^th-27^th October 2000 as seen from Chena Hot Springs, Alaska.28 mm focal-length wide angle lens. Taken on Kodak Elite Chrome 200 slide film. The temperature was below -20°C at the time.

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Noctilucent Clouds, June 2021

DSLR image (slightly cropped) taken on 4^th June 2021 at 01:41 UT from Rush, Co. Dublin. Exposure of 4 s, ISO 800.Focal length 27 mm. To the naked-eye the clouds appeared of moderate brightness. Capella is the bright star (to right of centre).

Noctilucent Clouds, June and July 2019

Left: DSLR image (cropped) taken on 28^th June 2019 at 00:31 UT from Rush, Co. Dublin. Exposure of 6 s, ISO 800. Focal length 18 mm. To the naked-eye the cloud appeared moderately bright. Capella is the bright star (at right).

Right: DSLR image (cropped) taken on 2^nd July 2019 at 00:30 UT from Rush, Co. Dublin. Exposure of 6 s, ISO 800. Focal length 33 mm. To the naked-eye the cloud appeared bright. Capella is the bright star (at right).

Noctilucent Clouds, June 2016

Left: A very bright display, image taken on 3^rd June 2016 at 00:39 UT from Rush, Co Dublin. Exposure of 10 s with DSLR, focal length 55 mm.

Right: Moderately bright noctilucent cloud, taken on 23^rd June 2016 at 01:22 UT from Rush, Co Dublin. Exposure of 8 s witha DSLR, focal length 18 mm (cropped).

Noctilucent Cloud, June 2013

DSLR image (cropped) taken on 8^th June 2013 at 00:37 UT from Rush, Co. Dublin. Exposure of 6 s, ISO 800.Focal length 35 mm. To the naked-eye they appeared very bright.

Noctilucent Cloud, June 2010

DSLR image (cropped) taken on 14^th June 2010 at 01:23 UT from Rush, Co. Dublin. Exposure of 8 s, ISO 400.Focal length 47 mm.

Noctilucent Cloud, July 2006

DSLR image taken on 14^th July 2006 at 22:51 UT from Rush, Co. Dublin. Exposure of 10 s.

Noctilucent Cloud, July 1990

Taken on 18^th July 1990 at 03:15 UT from Barnasligan, Co. Dublin. Exposure of 30 s on Fujichrome 100 with a 50 mm camera lens.

Zodiacal Light, May 2015

DSLR image taken on 13^th-14^th May 2015 at 02:54 UT. Texas Star Party (Prude Ranch in the Davis Mountains). Exposure of 15 s, ISO 800.Focal length 18 mm. To the naked-eye it was very evident. Venus is the brightest object. The Sun was then 15° below the horizon.