Astronomy - David Mathre Photography

Three-Years Ago (17-August-2016) — New Jersey

Backyard Summertime Night Sky Over New Jersey.

Night Time Thunderstorm. Two minute time-lapse video. Moon, Clouds, Lightning. Approximately 3000 Images taken between midnight and 4 AM from my backdoor using a Nikon D810A camera and 24 mm f/3.5 PC-E lens (ISO 800, 24 mm, f/4, 4 sec). At one point I had to move the camera away from the door during a heavy downpour. Time-lapse video created from the in camera jpg images using Photoshop CC. This was the fourth night in a row that we have had thunderstorms.

Monday (12-August-2019) — New Jersey

Backyard Summertime Night Sky Over New Jersey.

Night three trying to capture some of the Perseid Meteor Shower. Again with two cameras out 1) Nikon D810a camera with a 8-15 mm fisheye lens (ISO 800, 8 mm, f/4, 8 sec) and 2) Nikon D850 with a 19 mm f/4 PC-E lens (ISO 800, 19 mm, f/4, 8 sec). The sky was mostly clear, but the moon was bright. After reviewing the images, I did see a few meteor trails. Mainly in the fisheye images where more of the sky was covered.

Click on the above image to access the individual images in the slideshow

Daily Electric Energy Used (56.1 kWh) from Sense and Daily Solar Electric Energy Produced (75.2 kWh) from SolSystems and Locus Energy. Electrical Energy surplus for the day was 19.1 kWh.

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Sunday (11-August-2019) — New Jersey

Backyard Summertime Night Sky Over New Jersey.

Night two trying to capture some of the Perseid Meteor Shower. This time with two cameras out 1) Nikon D810a camera with a 8-15 mm fisheye lens (ISO 800, 8 mm, f/4, 8 sec) and 2) Nikon D850 with a 19 mm f/4 PC-E lens (ISO 800, 19 mm, f/4, 8 sec). After reviewing the images, not must luck. In order to process this many images I have four Surface computers running full time and at full power. By full power, I mean all four cores on the Microsoft Surface Studio 2 (with a dedicated video processor) are running hot — close to 100 °C (45 watts). The computer automatically shuts down if these temperatures are exceeded. The Microsoft Surface Book 2 (with a dedicated video processor) has this bad habit when being stressed to run only on the battery until the battery runs out even though it is plugged into an external power supply. So I had to go back and forth between the four computers to monitor how they were doing. My power usage for the day was nearly 4 kWh larger just because of the extra processing work being done by the computers and servers. Just glad it was a bit cooler outside and the sun was out most of the day to charge the solar panels.

Click on the above image to access the individual images in the slideshow.

Daily Electric Energy Used (51.5 kWh) from Sense and Daily Solar Electric Energy Produced (77.1 kWh) from SolSystems and Locus Energy. Just glad that it was cooler outside, even though the sun was out most of the day. Electrical Energy surplus for the day was 25.6 kWh. The weekly stats 384 kWh used, 440 kWh generated for a surplus of 56 kWh.

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Saturday (10-August-2019) — New Jersey

Backyard Summertime Night Sky Over New Jersey.

The weather forecast indicated the night sky would be relatively clear for a couple of nights. I hope to capture some of the annual Perseid Meteor Shower. The moon would be out for part of each night, so not ideal conditions. But I figured I would try. I set up a Nikon D810a camera with a 8-15 mm fisheye lens (ISO 800, 12 mm, f/4, 8 sec) to capture images all night (2550 images in total). It takes a lot of time to process all of the images for a Time-lapse video, and several Star Trail images. Lots of Jet Trails. How many Meteor Trails do you see? The Time-lapse Video is best viewed in a dark room.

Click on the above image to access the individual images in the slide show.

Daily Electric Energy Used (61.8 kWh) from Sense and Daily Solar Electric Energy Produced (73.43 kWh) from SolSystems and Locus Energy. I needed to clean the oven, and cooked dinner in the oven adding 3.7 kWh to the total used. Daily net surplus 11.6 kWh.

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Eleven-Years Ago (25-February-2008) — Colorado

Road Scholar “Photography in the Southwest” Workshop Day 1. Kelly Place & Canyon of the Ancients National Monument.

The first full day of an Road Scholar/Elderhostel photography workshop at Kelly Place — a Bed & Breakfast near Cortez, Colorado. This is a great location in McElmo Canyon, quiet and remote. It borders Canyon of the Ancients National Monument. I was attending the workshop with my Father and Brother. I went out on my own in the morning to take some pictures of Sleeping Ute mountain. After lunch walked around the site to look at some of the historical buildings and then went for a short hike into Canyon of the Ancients National Monument which is right next to Kelly’s Place. After it got dark, I set up a camera to take some star trail images.

Sleeping Ute Mountain and moon panorama on an early winter morning at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 20 mm, f/16, 1/1.7 sec). (David J Mathre) — Sleeping Ute Mountain and moon panorama on an early winter morning at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 20 mm, f/16, 1/1.7 sec). (David J Mathre)

Window looking out at Sleeping Ute Mountain and wood ladder to the Kiva at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens and interior fill flash (ISO 200, 16 mm, f/11, 1/250 sec). (David J Mathre) — Window looking out at Sleeping Ute Mountain and wood ladder to the Kiva at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens and interior fill flash (ISO 200, 16 mm, f/11, 1/250 sec). (David J Mathre)

Wood ladder to the underground Kiva at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 24 mm, f/11, 1/400 sec). (David J Mathre) — Wood ladder to the underground Kiva at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 24 mm, f/11, 1/400 sec). (David J Mathre)

Sleeping Ute Mountain and red back-hoe on an early winter morning at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 22 mm, f/16, 1/10 sec). (David J Mathre) — Sleeping Ute Mountain and red back-hoe on an early winter morning at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 22 mm, f/16, 1/10 sec). (David J Mathre)

Weeds with morning dew on at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 130 mm, f/2.8, 1/200 sec). (David J Mathre) — Weeds with morning dew on at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 130 mm, f/2.8, 1/200 sec). (David J Mathre)

Old tree on a hill at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 70 mm, f/16, 1/125 sec). (David J Mathre) — Old tree on a hill at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 70 mm, f/16, 1/125 sec). (David J Mathre)

Juniper berries at Kelley's Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 70 mm, f/11, 1/800 sec). (David J Mathre) — Juniper berries at Kelley’s Place near Cortez, Colorado. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 VR lens (ISO 200, 70 mm, f/11, 1/800 sec). (David J Mathre)

Larger size images from the slideshow can be viewed and purchased here.