Technology - David Mathre Photography

Sunday (15-January-2023) — New Jersey

Backyard Nighttime Sky Over New Jersey.

After several days of clouds and rain, the skies finally cleared. I had both the Stellina and Vespera systems out. There currently several active sunspots. During the night I captured images of the Andromeda Galaxy (M31), Orion Galaxy (M42), Rosette Nebula (NBC 2237), Satellite Cluster (NGC 2244), Pinwheel Galaxy (M101), and the Moon. Also, I used the manual mode to search for the Comet C/2022 E3 (ZTF). It was finally high enough to be viewed to the northeast over the house from my patio. I used the Sky Live website to get the location, and then just plugged the numbers into the Singularity application. Within minutes, both the Stellina and Vespera systems had the comet centered and started taking images.

For the following images, I processed the final JPG image with Topaz AI, followed by Capture One Pro. For the raw TIFF images, I needed to use Capture One Pro first, followed by Topaz AI. Follow the link to my PhotoShelter Gallery for larger views of the images. The nebulae images taken using the dual H-alpha, O-III filter are more vivid.

Vespera Deep Sky Observations. JPG images processed with Topaz AI, followed by Capture One Pro. Individual images in the slideshow are available in my PhotoShelter Gallery.

Vespera Deep Sky Observations. TIF images processed with Capture One Pro followed by Topaz AI. Individual images in the slideshow are available in my PhotoShelter Gallery.

Since it was a dark night, I also set up a camera to capture images for a composite star and jet trails view looking north. Polaris isn’t exactly at the celestial north point. The file size is 11656 x 8742 (403.4MB).

alt_title. (David J Mathre) — Star and Jet Trails looking north. Composite of 110 images taken with a Hasselblad X2d camera and 30 mm f/3.5 lens (ISO 64, 30 mm, f/8, 323 sec). Raw images processed with Phocus and Capture One Pro. Composite created with Photoshop (scripts, statistics, maximum). (David J Mathre)

Daily Electric Energy Used (92.8 kWh) from Sense. Daily Solar Electric Energy Produced (33.3 kWh) from Sense. Sunny. Deficit of 59.6 kWh.

Weekly Electric Energy Used (618 kWh) from Sense. Weekly Solar Electric Energy Produced (121 kWh) from Sense. Deficit of 497 kWh.

Saturday (24-December-2022) — New Jersey

Backyard Wintertime in New Jersey.

It was cold and breezy in the morning, but the sky was clear. So I decided to try out the Vespera Astro-camera with a solar filter to view the sun. I followed the instruction on the Singularity app and within 10 minutes was getting solar disk images with several sunspots. Unlike the nighttime observations where multiple images are used to make a composite image, the camera is taking individual images. It continues to track the position of the sun for as long as images are being recorded. I made a short time-lapse video shown below. One of the images captures the silhouette of a jet passing in front of the sun.

Jet Silhouette. (David J Mathre) — Silhouette of a Jet passing the Sun. Image taken with a Vespera Astro-camera. (David J Mathre)

The sky was clear again in the evening. I set the camera up just after astronomical twilight. I replaced the solar filter that I used earlier in the day with a dual band filter. The filter transmits wavelengths of light from the Hydrogen Alpha (H-alpha) and Oxygen III (O-III) emission bands seen in nebula. The filter has a sensor that lets the camera know that it has been installed. Presumably to adjust the sensor acquisition parameters. The filter appears to really improve the detail and contrast of the nebula images. During the night I used the Vespera to obtain images of the North America Nebula (NGC 7000), North America Nebula (M45), Crab Nebula (M1), Jellyfish Nebula (IC 433), Rosette Nebula (NGC 2237), Orion Nebula (M42), De Mairan’s Nebula (M43), Thor’s Helmet Nebula (NGC 2359).

Vespera Deep Sky Observations. Individual images in the slideshow are available in my PhotoShelter Gallery.

I also set up a camera for a star trail image looking south. The same general direction that is open for the deep sky Vespera astro-camera from my patio. Unfortunately, the raw file format (*.3FR) from the Hasselblad camera is not recognized by Capture One Pro. So this star trail image is a composite of the jpg images processed by Capture One Pro and PhotoShop CC.

Star Trails. (David J Mathre) — Star and Jet Trails looking South. Composite of 67 images taken with a Hasselblad X2D camera and 30 mm f/3.5 lens (ISO 64, 30 mm, f/8, 323 sec). (David J Mathre)

Daily Electric Energy Used (169.2 kWh) from Sense. Daily Solar Electric Energy Produced (29.4 kWh) from Sense. Sunny. Deficit of 139.8 kWh. This is most electricity used in one day since I started monitoring. Mainly because the GeoThermal HVAC needed the resistance heaters to boost the amount of heating needed to keep the indoor temperature at 66°F. The outdoor temperatures are supposed to get warmer over the next few days.

Friday (23-December-2022) — New Jersey

Backyard Wintertime in New Jersey.

Yesterday it rained most of the day. Then during the night, the temperature rose with more wind and rain. By noon the temperature was dropping rapidly, and for a short period there was heavy wind and blowing snow. That is when I got a picture of the Santa Nisse meditating before Christmas.

Meditating Santa. (David J Mathre) — Meditating Santa wishing for a white Christmas. Image taken with a Hasselblad X2D camera and 90 mm f/3.5 lens (ISO 64, 90 mm, f/4, 16 sec). (David J Mathre)

Just after astronomical twilight the sky was clear long enough to capture enough images of the Orion Galaxy (M42) using the Vespera astro-camera. After that the clouds came back with cold wind and blowing snow. The Vespera seems to handle 7°F (-14°C). I do leave the Vespera outside for 15 minutes to equilibrate before running the automatic initialization and autofocus. Then when done for the night, put a plastic bag around the Vespera before bringing it inside to minimize condensation.

Orion Nebula (M42). (David J Mathre) — Orion Nebula (M42). Composite of 258 images taken with a Vaonis Vespera Camera (200 mm, f/4, 10 sec). Image processed with Capture One Pro and Topaz Photo AI. (David J Mathre)

Daily Electric Energy Used (92.9 kWh) from Sense. Daily Solar Electric Energy Produced (2.9 kWh) from Sense. Rain and clouds. Deficit of 90.0 kWh. Once the outside temperatures drop below 10°F, the GeoThermal HVAC system requires additional resistance heating to maintain the inside temperature at 66°F.

Tuesday (20-December-2022) — New Jersey

Backyard Nighttime Sky Over New Jersey.

It was clear again overnight. I did three longer observations using the Vespera Observation Station. Crab Nebula (M1, 363 images), Orion Nebula (M42, 907 images). Pinwheel Galaxy (M101, 661 images). For the Orion Nebula observation, I tried the beta Mosaic mode to get a wider image. The sensor size for the Vespera captures a 1.6° x 0.9° field of view. With the Mosaic mode the field of view is up to 4x greater (3.2° x 1.8° = 8.2 Mpx). The longer observation times do provide sharper images with more detail and less noise.

For the following images, I processed the final JPG image with Topaz AI, followed by Capture One Pro. For the raw TIFF images, I needed to use Capture One Pro first, followed by Topaz AI.

Vespera Deep Sky Observations. JPG images processed with Topaz AI, followed by Capture One Pro. Individual images in the slideshow are available in my PhotoShelter Gallery.

Vespera Deep Sky Observations. TIF images processed with Capture One Pro followed by Topaz AI. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (95.7 kWh) from Sense. Daily Solar Electric Energy Produced (19.5 kWh) from Sense. Sun and clouds. Deficit of 76.2 kWh.

Monday (19-December-2022) — New Jersey

Backyard Nighttime Sky Over New Jersey.

I spent my first night with the Vespera (automated deep sky camera) capturing images of several objects. I set the Vespera up on a tripod in my back patio which has a view of the sky southeast to southwest, and to the north elevations above the house. Both east and west are blocked by trees. The Vespera is controlled via WiFi by the Singularity app running on an android (or iOS) device. Unfortunately, there is not a Window or web-based app. Also, the WiFi uses an open (not secured) connection between the notepad and Vespera. Once the WiFi connection is established the Singularity app controls the instrument. It takes 10-15 minutes to initialize the Vespera. During this time the camera points to the sky, determines its position and focuses the camera. After that it is just a matter of selecting the objects to view. The Singularity app has the location of several hundred objects (stars, clusters, nebulae, galaxies, and planets) pre-programed in its database along with recommendations for the length of image/data collection.

During the night I captured images of the Triangulum Galaxy (M33), Helix Nebula (NGC 7293), Pleiades Cluster (M45), Orion Nebula (M42), an open cluster (NGC 1502), Bode’s Galaxy (M81), Cigar Galaxy (M82), Polaris (North Star), Andromeda Galaxy (M31), a double cluster (NGC 884, NGC 869), Caroline’s Rose Cluster (NGC 7789), Rosette Nebula (NGC 2244), and the Seagull Nebula (IC 2177). I also had it view Jupiter; however, the disk is small, and I was not able to see Jupiter’s moons.

For most of the objects I did short 5-to-10-minute data collections just to get an idea of how the Vespera worked. This was shorter than the times recommended, but still provided decent images. The Vespera camera has a 200 mm focal length, f/4 aperture, and takes 10 second exposures. The camera uses a Sony IMX462 back-illuminated CMOS sensor (1920×1080) optimized for low light capture. The Vespera automatically processes (aligning and stacking) the images. Over time, the signal/noise ratio increases providing improved image quality. The default output from the Vespera is a JPG image every ~10 seconds (integrated stacked composite) displayed on the notepad screen. At the end of the observation the composite raw image can be saved as a TIFF file. The camera also has the ability to store individual raw images (FITS) that can be processed offline using more sophisticated software. The Vespera does not have a port (USB, ethernet) or memory card slot (SD, CF) to download the data collected by the onboard computer. The data needs to be downloaded by FTP via WiFi. The Vespera has 10 GB of onboard memory for storing images. You need to remember to remove/delete images after downloading to free up space for the next night of observations.

For the following images, I processed the final JPG image of the object with Topaz AI, followed by Capture One Pro. For the raw TIFF images, I needed to use Capture One Pro first, followed by Topaz AI.

Vespera Deep Sky Observations. JPG images processed with Topaz AI, followed by Capture One Pro. Individual images in the slideshow are available in my PhotoShelter Gallery.

Vespera Deep Sky Observations. TIF images processed with Capture One Pro followed by Topaz AI. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (95.7 kWh) from Sense. Daily Solar Electric Energy Produced (19.5 kWh) from Sense. Sun and clouds. Deficit of 76.2 kWh.