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Something new? Or already an old topic? (the "odd blue nebula" in Orion, see Wikisky)

Off-topic Deep Sky Nebula
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Danny Caes avatar
Danny Caes avatar
A possible enigma of astrophotography. I guess 99,9 % of the astrobinners of deepsky objects are familiar with my (so-called) odd blue colored nebulous discovery. Or maybe not… (?). Anyway, "it" is located at R.A. 6:05:13 / Decl. -2°48'13" (Epoch 2000.0) in the constellation Orion. Perhaps it is only noticeable in Wikisky, or… (??). It looks like a skyblue gaseous nebula with lots of curly "appendages", especially at the southern part of it. Now, WHAT exactly is it, or what could it be? And… does it have a name or nickname?

The nearest one of the HD stars is HD 41421.
Engaging
Oscar avatar
Oscar avatar
is it like 50 arcminutes away from NGC2184? there's nothing there

can you take a screenshot?
Danny Caes avatar
Danny Caes avatar
Just go to WIKISKY (the "vandalized" online star atlas), ask to show NGC 2184 (in the small horizontal bar), and you shall be very near the odd blue thing just to the west of NGC 2184.
Oscar avatar
Oscar avatar
Danny Caes:
Just go to WIKISKY (the "vandalized" online star atlas), ask to show NGC 2184 (in the white bar), and you shall be very near the odd blue thing just to the west of NGC 2184.

okay I see it

I'll post a screenshot of it here to simplify for others
Oscar avatar
Oscar avatar

(to the people who don't know: I cropped and copied the coordinates, and pasted it under the blue thing; this is not the actual layout of the website)

I vote that this is an artifact, or otherwise, someone deliberately painted that

if you look on Telescopius, there is no object at the specified coordinates
Danny Caes avatar
Danny Caes avatar
By the way, WIKISKY doesn't show a catalog number for this pure blue nebulous object, only the catalog numbers of the very weak stars in it (the "USNOA 2" numbers).

It has a curious SHRIMP-esque look. Wikisky's blue shrimp in Orion…

WIKISKY shows a lot of non-I.A.U. nomenclature. Since tuesday the 13th of august (2024) I detected 316 (threehundred and sixteen) so-called "names" of stars. Where do they come from… that's what I want to know.
Oscar avatar
Oscar avatar
just stick to Aladin, Simbad and Telescopius for identifying things

have you heard of Aladin and Simbad?
Danny Caes avatar
Danny Caes avatar
SIMBAD is familiar, yes, especially to get the series of many "other" catalog numbers of, for example, a common naked eye star. Telescopius is unknown to me. I'm learning! Thanks Oscar! (note: I'm still in the days of Wil Tirion's good old fashioned URANOMETRIA 2000.0 star atlas, I'm a humble amateur astronomer). I wonder if I could get a second hand Millennium Star Atlas, who knows, at our local flea market…

People up there (at our local flea market) look at me with eyes… when I ask them if they have star atlases, or dark blue globes which show all 88 constellations…
V avatar
V avatar
That is an artifact with the photographic plates of the original DSS. Likely a gob of dust.
Well Written
Danny Caes avatar
Danny Caes avatar
A curious thought… one should explore the gigantic (or enormous) universe to get online images of enlarged microscopic dust particles. I wonder if there are more than this (blue) one in Wikisky… (there are many disc shaped telescopic reflection images of bright stars, curious elongated thin streaks too, "stellar autostrada").

By the way, Courtney Seligman's online photographic overview of the New General Catalogue (NGC) and Index Catalogue (IC) has several images of extragalactic systems which show "three colored triplets" very near them (red-green-blue). I guess these triplets are (perhaps) the tracks of asteroids, photographed through three different color filters (?). Could we call it "conjunctions of asteroids with extragalactic systems"?