Category Archives: Astronomy

Great American Eclipse

Total Solar Eclipse 21 Aug 2017 – Totality Composite v2


Ein erstes Album mit Bildern von der totalen Sonnenfinsternis am 21. August 2017 in Oregon, USA, ist jetzt fertig. Zu finden auf Facebook, Google Fotos, OneDrive oder hinter dem “continue reading”-Link …

A first album with photos of the total solar eclipse on 21 Aug 2017 aka the “Great American Eclipse” in Oregon, USA, is now ready. To be found at Facebook, Google Photos, OneDrive or behind the “continue reading” link …

Lokation / location:

The Cove Palisades State Park near Culver, Oregon, USA

44°34’48.2″ N
121°15’42.0″ W
783 m

C1 9:06:34 PDT / 16:06:34 UT
C2 10:19:22 PDT / 17:19:22 UT
C3 10:21:19 PDT / 17:21:19 UT
C4 11:40:52 PDT / 18:40:52 UT

Totality duration 1m 57s.

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Partial Solar Eclipse 01 Sep 2016 Namibia

Partial Solar Eclipse 01 Sep 2016 Namibia from Martin Junius on Vimeo.

Time-lapse video of the partial solar eclipse on Hakos, Namibia (annular in Central Africa, Madagascar, La Réunion).

Zeitraffer der partiellen Sonnenfinsternis auf Hakos, Namibia (ringförmig in Zentralafrika, Madagaskar, La Réunion).

Namibia Widefield 2016

All widefield images taken in Namibia this summer, the two milky way shots even made it as Image Of The Day on Astrobin!

All Übersichtsaufnahmen vom Sommer diesen Jahres in Namibia, die beiden Milchstraßenbilder haben es dabei sogar zum Bild des Tages auf Astrobin geschafft!

IAS Observatory, Hakos, Namibia
Canon 5D Mark II(a)
Canon EF 50/1.8 STM
Fornax-50 mount

Transit of Mercury

Transit of Mercury 09 May 2016 from Martin Junius on Vimeo.

Somewhat cloudy, especially towards the end, but most of the transit of Mercury was clearly visible from Brück, Cologne, Germany.

Einige Wolken, besonders zum Ende hin, aber der Großteil der Merkurtransits konnte in Brück, Köln beobachtet werden.

The time-lapse video is available on / das Zeitraffervideo gibt’s auf: Facebook, Vimeo, Youtube.


  • Canon 5D Mark II, Televue Powermate 2x, William Optics FT 81 FD f/5.9 478mm, Baader filter, Skywatcher AZ EQ6 GT
  • Canon 5D Mark III, EF 8-15 f/4 L Fisheye @ 14mm
  • GoPro Hero4 Silver
  • 2x ISR Twin1 timer

Location: near Friedhof Brück, Cologne, Germany
50°55’45” N 7°4’43” E

Blurb PDF Upload

Namibia 2015 - IAS Edition

Namibia 2015 – IAS Edition

FINALLY! ;-) It seems that I’ve solved my problems with Scribus PDF/X-3 photobooks failing the preflight check when uploading them to Blurb. The photobook above used to be rejected during excessive tests a couple weeks ago.

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Himmelshintergrund mit der Kamera messen

Screenshot Lightroom

Screenshot Lightroom

Manchmal lässt sich das “engineer by trade” nicht ganz leugnen und etwas Analytik ist gerade in der Astrofotografie nicht verkehrt.

Fragestellung: wie kann man anhand eines Fotos des Nachthimmels die Hintergrundhelligkeit ermitteln? Analog zu den Messwerten des Sky Quality Meters?

Samir Kharusi hat unter “Measuring Skyfog from Camera JPEG” die Methodik beschrieben, ich hab mir die Mühe gemacht, das mit Raw-Dateien, Lightroom und Excel zu operationalisieren.

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Astrophotography IAS, Hakos 2015

Trifid Nebula - M20 or NGC 6514

Trifid Nebula – M20 or NGC 6514, 32 x 300s

Southern Pinwheel Galaxy - M83 or NGC 5236

Southern Pinwheel Galaxy – M83 or NGC 5236, 30 x 300s

Omega Centauri - NGC 5139

Omega Centauri – NGC 5139, 24 x 90s

NGC 6726, 6727, 6729, IC 4812 in Corona Australis

NGC 6726, 6727, 6729, IC 4812 in Corona Australis

NGC 6188

NGC 6188, 24 x 300s

IC 4603 and Rho Ophiuchi

IC 4603 and Rho Ophiuchi, 16 x 300s

Centaurus A - NGC 5128

Centaurus A – NGC 5128, 25 x 300s

Cat's Paw Nebula - NGC 6334

Cat’s Paw Nebula – NGC 6334, 16 x 300s

IAS Observatory, Hakos, Namibia
20″ Philipp Keller Cassegrain primary focus @ 1500mm f/3
Liebscher Mount with FS2
Off axis guiding with Lodestar X2, dithering with BackyardEOS and PHD2
Canon 5D Mark II (a) or 5D Mark III (unmod), varying crop
Varying # of subs and exposure, see above, ISO 800 + sky flats/bias, no darks
Image processing DeepSkyStacker, Lightroom, Photoshop

Flight into Darkness

Total Solar Eclipse 20 Mar 2015 #5 - 3rd Contact

Total Solar Eclipse 20 Mar 2015 #5 – 3rd Contact

More than two years after our last one, we took the plunge and off into the darkness. Literally.

What I’m writing about is the total solar eclipse of 20 March 2015 over the Northern Atlantic Ocean, of course. A place and time where weather prospect weren’t exactly stellar or solar, thus quite early, already in 2013, we booked Eclipse Reisen’s e-flight (operated by Air Berlin, AB 1000) from Düsseldorf.

Into the car, onto the plane, into the darkness, back into the light and the Düsseldorfian fog, and home-bound again. 12 hours round-trip, certainly a very “efficient” eclipse trip. ;-)

The experience in the air was quite different from our previous ground-based eclipse excursions. A lot of the anxiety and anticipation – will we really see totality? – is missing, as success is almost guaranteed. And when the plane finally navigates into the “eclipse run”, the partial phase is mostly completed, we didn’t get to see C1 or C4.

But absolutely priceless is the view of the moon’s umbra moving across the clouds below, seemingly slowly catching up with the air plane, then plunging us into darkness, and finally off it goes, moving away from of us. Thus I’m very happy that I was able to catch this on video.

35,000 ft above the Northern Atlantic / Norwegian Sea with mid totality at 63°31’21.3″N 7°53’05.6″W / UTC 09:43:30. From the telephoto shots I did, the contact times and positions were as follows:

  • C2 at UTC 09:41:35 / 63°20’18” N 8°13’23” W
  • C3 at UTC 09:45:15 / 63°40’53” N 7°35’37” W

for a totality duration of 3min 40s.

Impressive, as it always has been and will be. Where’s the next one? …