Daniel's Astro Archive



Other stuff

September 11 2021

Smith Mountain State Park, Virginia Bortle 4

August 29 2021

Another exposure of Barnard's Star, just to check if I could notice any small movements. I compared it with my picture from May. I spy, with my little eye, another variable star. See it? RA 18h 05m 25.8s DEC +05:13:15 J2000: 271.3575 5.22083333 Also, I think I *may* have gotten some movement out of Barnard's Star. It might not be movement, but if it is, then it's a very miniscule amount of it.

June 23 2021

A second exposure confirms that my recent finding was not a camera error, but a variable star. ISO 6400 1s f/5.6 50 light / 10 dark Bortle 8 variable.gif: All of my pictures of this star. You should be able to see the star changing in brightness. closer.gif: In case the first one is too small, this compares two shots, showing that the star clearly dimmed in the later one. I scoured tons of star catalogs, and I could only find one source documenting this star: http://astro.corlan.net/stars/OPH/SV-OPH.html It's right beside Barnard's star, a common target. Surely this star should be more popular...

Jun 19 2021

While taking a picture of Barnard's Star, I noticed this. These were taken 50 days apart, and the star is not there in the newer picture. ISO 6400 1s f/5.7 50 light frames, 20 dark frames Stacked in DSS Explanations sorted by likelihood: - crud on camera sensor - processing glitch - Variable star, or dust - It just disappeared or something - Aliens??? https://nova.astrometry.net/user_images/4792721 RA: 17h 56m 24.6s | Dec: +03:22:41

May 1 2021

Barnard's Star > Barnard's Star is a red dwarf about six light-years away from Earth in the constellation of Ophiuchus. It is the fourth-nearest-known individual star to the Sun after the three components of the Alpha Centauri system, and the closest star in the northern celestial hemisphere. Its stellar mass is about 14% of the Sun's. Despite its proximity, the star has a dim apparent magnitude of +9.5 and is invisible to the unaided eye; it is much brighter in the infrared than in visible light. - https://en.wikipedia.org/wiki/Barnard%27s_Star Canon 1300D ISO 6400 1s f/5.6 50 Light frames 20 Dark frames Stacked in deep sky stacker I did not use a star tracker, only constellations and public data. This was very difficult in a Bortle 8 city with a target near the horizon. You can find additional information at: https://nova.astrometry.net/user_images/4605499

December 21 2020

December 20-21 The "Christmas Star" Saturn and Jupiter align. This happens once every ~20 years, but this happens to be the closest since the 1700s. The GIF was made from 8 frames, ISO 6400 4s f/5.6, manually stacked with GIMP The JPG is just a compressed image from my camera, edited slightly with GIMP

November 21 2020

ISO 3200 f10 1/800s Manually tracked, 300mm Canon DSLR I took ~40 pictures of the ISS, removed the bad ones, and ended up with ~30. I manually aligned them in GIMP, and exported to GIF.

November 2 2020

ring.jpg The Ring Nebula is tiny. A real telescope would be needed in order to get details. But you can see, it is a blue thing, with a hole in it. dumbbell.jpg Dumbbell Nebula ~70 1 sec exposures stacked with 20 dark frames bortle 7

October 18 2020

Very good visibility. I was near a big lake, and in one picture you should be able to see the Milky Way reflection in the background. From the pictures I took that night, I am making a map of the milky way.

October 17 2020

90 light frames: 90mm 2 second exposure f/5.7 6400 ISO 50 Dark frames (same with lens cap) Taken at home (bortle 7/8)

October 6 2020

Messier 32 A simple image showing a long exposure of Messier 32, near the central galaxy. Greensboro North Carolina. Bortle 8.

September 6 2020

Trip to Blue Ridge Parkway, testing light pollution on the milky way

June 5 2020

ISS and moon photography

May 6 2020


April 18 2020

Photo dump from Blue Ridge Parkway

Mar 25 2020

Common spring targets

Jan 21 2019

Jan 2019 Blood Moon

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