With #3 recently discovered in the analysis during preparation of Gaia DR4 data, there are now 3 black holes in the Gaia catalog. Or more precise, 3 binary systems consisting of a companion star and a likely stellar-mass black hole.
Regarding the BH3 image, at first I wasn’t sure whether I found the right object, as the catalog gives the coordinates RA=19h39m18.7115472s, DEC=+14d55m54.010992s and the read-out in Pixinsight showed ICRS RA=19h39m18.68s, DEC=+14d55m50.3s. But thanks to the discussion with Ulrich Bastian I found out that it is necessary to take into account the large proper motion of the object, which results in almost 4″ deviation in declination. Calculating the current position for 2024.5 with Astropy yields RA=19h39m18.66368537s DEC=+14d55m50.2085012s.
Almost exactly 10 years ago, I photographed the magnificient Pavo Galaxy with the IAS 20 inch AK3, my first object with such a “big scope”. Here’s the result of June 2024, with much more exposure time on the very same telescope. I originally planned to use my QHY268M with the AK3, but this camera is now used at the new IAS remote telescope. So back to the roots with a ASI294MC Pro one-shot-color camera.
The first light of the new IAS remote telescope at Hakos, Namibia. NGC 5139 aka Omega Centauri, the most massive known globular cluster in the Milky Way.
“Second” light of the new IAS remote telescope at Hakos, Namibia, featuring IC 4628, the Prawn Nebula in Scorpius. (Actually taken while on-site in June. ;-)
Star trail over the Terlingua Ranch Lodge. This image is a composite of the foreground landscape at dusk and 2 hours of starry night after the Moon set in the wee hours.
You don’t get this often: colorful aurora at 51° latitude, north-east of Cologne, Germany. A strong solar storm is currently impacting Earth.
Das sieht man auch nicht alle Tage: Polarlichter in allen Farben über den ganzen Himmel bei heimischer 51° Breite, nordöstlich von Köln. Ein massiver Sonnensturm trifft gerade auf die Erde.
Another image from the total solar eclipse of 08 Apr 2024, a highly processed HDR composite of the corona, using 13 x 2 exposures from 1/1000 to 4 s.
There was a bit of a focus problem which I noticed only when reviewing the telephoto frames. Thus, my TSE 2024 shots aren’t as sharp as they could be.
Location: Pocahontas, Missouri, USA Longitude 37° 29′ 56.412″ N, latitude 89° 38′ 34.074″ W, altitude 183 m (Xavier’s Google Maps tool) Longitude 37° 29.9295′, latitude -89° 38.5659′, altitude 189 m (GPS reading Eclipse Orchestrator Pro) Timezone CDT = UT – 5h
Again many, many thanks to the great local communicty, in particular Doris and Jim.
Circumstances (Eclipse Orchestrator Pro): Duration 4m 08s C1 – 17:42:01 UT – 12:42:01 CDT C2 – 18:58:22 UT – 13:58:22 CDT – 13:58:22 camera time C3 – 19:02:30 UT – 14:02:30 CDT – 14:02:29 camera time C4 – 20:17:29 UT – 15:17:29 CDT – 15:17:29 camera time