tomato Posted November 6, 2022 Share Posted November 6, 2022 Last night I was trying to image away from a 93% illuminated moon so had a go at an interesting looking galaxy NGC 2146 in Camelopardalis. This 156 x 2 mins with the Esprit150/IMX571c dual rig. I set out to capture twice this amount of data but for some reason my usually reliable method of setting the dome rotation rate to keep the scopes aligned with the open aperture went awry after a couple of hours, so I imaged the inside of the dome for half the session. The annotation script in PI did not identify the object circled in purple. It looks like a galaxy but has two bright cores, I presume one is a faint foreground star. Thanks for looking 11 Link to comment Share on other sites More sharing options...
Rodd Posted November 7, 2022 Share Posted November 7, 2022 Nice. The moon is tough. Galaxies are bright, though. Looks pretty good! 1 Link to comment Share on other sites More sharing options...
wimvb Posted November 7, 2022 Share Posted November 7, 2022 (edited) Very nice! Here's the mysterious galaxy, I believe http://simbad.u-strasbg.fr/simbad/sim-id?Ident=2MASS J06213825%2B7813105 Edit: no, that's not it. It doesn't turn up in aladin either Edited November 7, 2022 by wimvb 1 Link to comment Share on other sites More sharing options...
tomato Posted November 7, 2022 Author Share Posted November 7, 2022 Thanks, there does look to be some ‘fuzziness’ running at 45 degrees to the core, which is what made me think it was a galaxy. It’s quite large though, so I would have thought it would feature in the more prominent catalogues. Link to comment Share on other sites More sharing options...
markse68 Posted November 7, 2022 Share Posted November 7, 2022 (edited) according to skysafari there are 2 ngc2146’s with quite large separation. Which is weird! Could it be the 2nd one? Edit- no that’s the bigger one labelled PGC18960 Mark Edited November 7, 2022 by markse68 Link to comment Share on other sites More sharing options...
gorann Posted November 7, 2022 Share Posted November 7, 2022 I really like the image and I think that main galaxy is new to me. A gentle touch of the new NoiseXTerminator could alleviate the effect of imaging the obsy wall half night😉 1 Link to comment Share on other sites More sharing options...
gorann Posted November 7, 2022 Share Posted November 7, 2022 PS. You seem to have caught another unidentified faint fuzzy just below PGC2775989. 1 Link to comment Share on other sites More sharing options...
wimvb Posted November 7, 2022 Share Posted November 7, 2022 4 hours ago, tomato said: Thanks, there does look to be some ‘fuzziness’ running at 45 degrees to the core, which is what made me think it was a galaxy. It’s quite large though, so I would have thought it would feature in the more prominent catalogues. It is a galaxy, snd it’s a bit strange that it’s not in any galaxy catalogue. So let’s name it tgc 1 (Tomato Galaxy Catalogue, 1st entry). 1 1 Link to comment Share on other sites More sharing options...
gorann Posted November 7, 2022 Share Posted November 7, 2022 (edited) 1 hour ago, wimvb said: It is a galaxy, snd it’s a bit strange that it’s not in any galaxy catalogue. So let’s name it tgc 1 (Tomato Galaxy Catalogue, 1st entry). Wow, Tomato, aka Steve, has found a new galaxy, with a little help from his friends👍😁 What about the fuzzy I spotted in his image Wim? Edited November 7, 2022 by gorann Link to comment Share on other sites More sharing options...
tomato Posted November 7, 2022 Author Share Posted November 7, 2022 Wow guys! Surely galaxies as prominent as these ones have been catalogued somewhere? I get how tenuous nebulosity may not have been categorised, but galaxies are distinct objects, much easier to identify and label. @gorann, it has had a dose of NoiseXterminator already, at 70% Noise reduction, 40% detail. I think what has created the horrible mottled coloured background is me boosting the Chrominance level after the noise reduction was applied, in an effort to improve the appearance of the galaxy when zoomed in, in hindsight not a good idea. I have got to the bottom of what went wrong with the dome aperture tracking, I took a measurement of the Azimuth change in Stellarium at about 20:00 hrs, with this object being so close to the celestial pole later in the night the Az motion stops and then goes retrograde...oops. Looks like I will be modifying the dome control software to accommodate this. 1 Link to comment Share on other sites More sharing options...
tomato Posted November 7, 2022 Author Share Posted November 7, 2022 True to form, here is me posting another rendition, hopefully with an improved background. 5 Link to comment Share on other sites More sharing options...
Paul M Posted November 7, 2022 Share Posted November 7, 2022 TGC1 does show in MAST imagery as shown here in HNSKY. NED comes up with a few objects in the area but not this galaxy. It certainly show some structure. Looks like an interesting galaxy so someone, somewhere must have something on it. Link to comment Share on other sites More sharing options...
ONIKKINEN Posted November 7, 2022 Share Posted November 7, 2022 1 hour ago, tomato said: True to form, here is me posting another rendition, hopefully with an improved background. This one does look a bit better. Try desaturating the background with a selection on everything but the signal parts, would probably get rid of the RGB noise that remains. Link to comment Share on other sites More sharing options...
wimvb Posted November 7, 2022 Share Posted November 7, 2022 I checked for any galaxies in Vizier in this area, and found several that are not in your image, but not one correspondig to TGC 1. Weird, because your candidate isn't that faint, and DSS shows more detail than in your image. Link to comment Share on other sites More sharing options...
wimvb Posted November 7, 2022 Share Posted November 7, 2022 5 hours ago, gorann said: Wow, Tomato, aka Steve, has found a new galaxy, with a little help from his friends👍😁 What about the fuzzy I spotted in his image Wim? 2MASX06155357+7812021 From the 2MAS extended catalogue The 2MASS Extended Catalog (2MASX) It's also in GAIA DR3 (GAIA Data Release 3) 2 Link to comment Share on other sites More sharing options...
gorann Posted November 7, 2022 Share Posted November 7, 2022 1 hour ago, wimvb said: 2MASX06155357+7812021 From the 2MAS extended catalogue The 2MASS Extended Catalog (2MASX) It's also in GAIA DR3 (GAIA Data Release 3) Good, so we only have one mystery galaxy then! Link to comment Share on other sites More sharing options...
wimvb Posted November 7, 2022 Share Posted November 7, 2022 20 minutes ago, gorann said: Good, so we only have one mystery galaxy then! We have one less. 😁 1 Link to comment Share on other sites More sharing options...
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