Ursa Major and comet Neowise + RIDDLE   6177
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Labels

1 Alioth
2 Megrez
3 Phecda
4 Merak
5 Dubhe
6 Tania Australis
7 Tania Borealis
8 Constellation Ursa Major
9 Talitha Australis
10 Talitha Borealis
11 Muscida
12 Comet Neowise
13 Menkalinan
14 Constellation Auriga
15 Capella
16 Almaaz
17 Hoedus II
18 Hoedus I
19 Elnath
20 Fake star
21 Hassaleh
22 Pleiades star cluster

Details

Location: Terneuzen, Waterfront (66 m)      by: Mentor Depret
Area: Netherlands      Date: 2020 07 11 1:23 am UTC 3:23 CEST
This is a wider view of the northern starry sky above the river Scheldt, in early July, about 2 hours before sunrise, when the comet was brightest and easily visible with naked eyes. At left I have connected the stars of the well-known constellation of Ursa Major, the Greater Bear, with very faint lines. Ursa Major belongs to the circumpolar constellations which are always visible above the horizon in our regions somewhere around the Pole star. However, during the short summer nights, Ursa Major looks best because the animal is in natural position with its legs to the Earth. The constellation is not complete on the pano because star Alkaid and double star Alcor, Mizar of the tail as well as Alula Borealis and Alula Australis forming the foot of the hind leg, were out of the view from my balcony. The other bright stars of the constellation are annotated on the pano. Ursa Major is the largest northern constellation and the third largest constellation in the sky. Its brightest stars form the Big Dipper asterism which is one of the most recognizable shapes in the sky. A fivefold extrapolation of the distance between the last 2 stars of the square (Merak-Dubhe) brings you to the Pole star.
A closer look at the comet can be seen in pano 27788 which was shot 22 minutes earlier.
On July 21, I photographed the comet again. It had moved inbetween the Tania and Talitha stars of Ursa Major but I was no longer able to see it with naked eyes.

RIDDLE: one star on this pano is fake, which one?

The fake star is a bonding point of the sensor. I always eliminate these points but I forgot this one. But I will give a hint: look around Auriga!

RIDDLE NOT SOLVED although I can imagine it isn't easy. So I annotated the fake star just above Elnath at 1 o'clock.

Canon Eos M6 with EF-M 18-150 mm, 9 p RAW, 18 mm (28.8 mm KB), iso 400, f 5.6, 15 s, 3500°K, PtguiPro 9721x3887 152.3 MB TIFF, downsized in stepdown 1943>1000>500 TIFF>1251x500 489 KB JPEG

Comments

Stunning documentation of this spectacular phenomenon, Mentor !!!

Cheers, Hans-Jörg
2020/08/01 17:50 , Hans-Jörg Bäuerle
Indrukwekkend!
2020/08/02 11:14 , Arjan Veldhuis
I am no expert on stars and unfortunately cannot contribute to the riddle. Cheers, Martin
2020/08/02 20:12 , Martin Kraus
Schöner Abendhimmel, dem du gerne etwas mehr Raum geben könntest. Prima ausführliche Beschriftung. Den zusätzlichen Stern konnte ich bislang nicht entdecken. Bei deiner Beschriftung sind alle Einträge ein paar Pixel nach rechts verschoben. Ist das so beabsichtigt?
2020/08/04 14:30 , Dieter Leimkötter
I don't really have any idea about the riddle. That one above capella maybe ?

I'm far away to be an expert and I have nothing heard about visible bonding points up to now. Can you tell a bit more ?
The software shall remove such points like hot pixels while developing the RAW's, how about this point ?
2020/08/05 19:32 , Steffen Minack
Thanks for the comments guys.

To Dieter: this was photographed early in the morning and indeed I put the marker points systematically above and slightly to the right of the star because I felt it improved clarity.

To Steffen: I don't see the fake pixels on de RAW's but they always appear after processing (with Digital Photo Professional 4) on the same location on the TIFF's. If you magnify to pixel level, they look like a small white cross.
A year ago I contacted Canon for this because I thought this were dead pixels. I got a new sensor but these fake pixels are still there on the TIFF's. It is extremely annoying because it takes a lot of work to eliminate them on the pano. I want the starry sky to be correct. I will contact Canon again in coming days to discuss the matter. Nobody else has seen this too?
2020/08/05 22:55 , Mentor Depret

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Mentor Depret

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