Submission: 2018 December

[Lukasz83]

Review of popular planetary nebulas
Copyrights: Łukasz Sujka ( https://www.facebook.com/lukasz.sujka.astronomy/ )

Today a small summary of the work from 2018
Overview of all planetary nebulae in one photo

This collage shows at the same time showing the differences in the angular size of all of this objects.

Sizes of objects are indicative - different sources showing diffenert size of the objects depending if its including external nebula layer or not.
I was trying to describe the size on the picture based on the catalogues and setup scale calculation.

The photos were made in technique tof short exposures with the times of single exposure not exceeding 12 seconds.

The stars in the background are of course a random composition created from the photo of Messier 27

Setup in any case the same:

Telescope Newtonian SW 250/1200 + camera ASI178 MM-C +
Baader LRGB filter and Mark III Coma Corrector

>> LINK to web-page (credits): https://www.facebook.com/lukasz.sujka.astronomy/
>> LINK to FULL-RES: https://www.astrobin.com/full/380806/B/?nc=user

[Ann]

Review of popular planetary nebulas
Copyrights: Łukasz Sujka ( https://www.facebook.com/lukasz.sujka.astronomy/ )

composition 60%.jpg

Today a small summary of the work from 2018
Overview of all planetary nebulae in one photo

This collage shows at the same time showing the differences in the angular size of all of this objects.

Sizes of objects are indicative - different sources showing diffenert size of the objects depending if its including external nebula layer or not.
I was trying to describe the size on the picture based on the catalogues and setup scale calculation.

The photos were made in technique tof short exposures with the times of single exposure not exceeding 12 seconds.

The stars in the background are of course a random composition created from the photo of Messier 27

Setup in any case the same:

Telescope Newtonian SW 250/1200 + camera ASI178 MM-C +
Baader LRGB filter and Mark III Coma Corrector

>> LINK to web-page (credits): https://www.facebook.com/lukasz.sujka.astronomy/
>> LINK to FULL-RES: https://www.astrobin.com/full/380806/B/?nc=user

Thanks, that's really cool!

The fact that the planetaries are of different sizes in the sky must be due to a combination of their true physical sizes and the distances to each one of them.

I can't help noticing that the planetaries are differently colored, too. In some cases, the color difference is simply due to how much Hα and how much OIII there is in each planetary. But in other cases the difference might be due to something else. For example, both NGC 6905, The Blue Flash Nebula, and NHC 3242, The Ghost of Jupiter, appear to be OIII-rich. But NGC 6905 looks quite blue, while NGC 3242 looks quite greenish. Is the color difference real?

Ann

[roberto.barcellona]

M45,46p 46P/Wirtanenm, Geminid & Flux nebula
Copyright: Roberto Barcellona
Site: Castelmagno (CN) - Italy - Associazione Astrofili Bisalta
Instrumentation: Canon 6d modified @ 3200 ISO - 31x180sec - Canon 85mm @ f/4

Click to view full size image

link to hi-res: https://i.postimg.cc/kg6SWLbg/46p-final ... 5mm-f4.jpg

[Steve Pastor]

Open Cluster in Cassiopeia

The open cluster NGC 663 is found in the constellation Cassiopeia. NGC 663 contains a significant number of Be stars (spectral class B stars showing emission lines in their spectra). The distance from us is on the order of 2,100 parsecs (6850 light years). The image is a total of 5 hrs 20 min exposure taken with a 12.5” RCOS f/9 @ f/6 (Astro-Physics CCDT67) and SBIG STF8300m camera on a Paramount ME in Mayhill, NM on the nights of 28 Nov and 3 Dec, 2018 (6 x 1200 sec R; 5 x 1200 sec G & B; 24 darks; 128 bias; 128 flats). Processed in PixInsight 1.8.5.1353 Ripley (x64).

[HHV]

"Close to the Spider"

IC 417 - well known emission nebula in the constellation Auriga. Again made with my 10inch Newtonian reflector and full format DSLR:

[tonypan]

Big fireball over the temple
This picture show a big fireball from Gemini over the temple of Hongyuan County, Sichuan Province,China.
https://www.flickr.com/photos/tonypysm/
Copyright: Yang Pan

Click to view full size image

Lager:https://www.flickr.com/photos/tonypysm/45609549514/

[trobison]

Sharpless 2-313 / Abell 35 – Low Surface Brightness Planetary Nebula with a Twist

Full description on flickr page. Three year project.

SH2 313 / Abell 35 – Low Surface Brightness Planetary Nebula with a Twist by Terry Robison, on Flickr

[astroligu]

comet 46P Wirtanen on 15/12/2018, when it was "near" the open cluster M45. The photo it was take from Italy, no remotely for me it was very hard, too cold I am too old for this ....

link for high res,https://www.astrobin.com/full/381409/0/

[Ann]

comet 46P Wirtanen on 15/12/2018, when it was "near" the open cluster M45. The photo it was take from Italy, no remotely for me it was very hard, too cold I am too old for this ....

link for high res,https://www.astrobin.com/full/381409/0/

Very well done! Thank you!

Ann

[Steed]

2018双子雨留念，摄于北京灵山。 by 虞 骏, on Flickr

[Alson Wong]

Comet 46P/Wirtanen with the Hyades and the Pleiades
www.alsonwongastro.com
Copyright: Alson Wong
https://scontent-sjc3-1.xx.fbcdn.net/v/ ... e=5C9C5CB1

[kevin-palmer]

Here is my capture of Comet 46P/Wirtanen at closest approach early this morning from Sheridan, Wyoming.

This image was shot with a Nikon 180mm f2.8 lens on a Nikon D750. It is a stack of 8 2.5 minute exposures, along with 4 dark and bias frames. An iOptron Skytracker was used to track the stars.

The Flyby by Kevin Palmer, on Flickr

[Alson Wong]

Comet 46P/Wirtanen with the Hyades and the Pleiades
www.alsonwongastro.com
Copyright: Alson Wong

[Alson Wong]

Comet 46P/Wirtanen with the Hyades and the Pleiades
www.alsonwongastro.com
Copyright: Alson Wong

[JeffWarnerPHOTO]

Nearly 100 meteors streak over Mt. Antero on 12/14/18, from near Nathrop, Colorado. One meteor showed a 'persistent train' (a trail of ionized gases), which was visible for nearly 5 minutes before dissipating; a small meteor pierces Comet Wirtanen (right side, center). Captured over 5 hours, composite image sequence using a Canon 5Ds, Tamron 15-30/2.8: 15mm, f/2.8 ISOO 4000, 20s used for sky, 120 sec for foreground.

[jjimenezpp]

M45 Pleiades &46P/Wirtanen by José Jiménez, en Flickr




M45 y Cometa 46P/Wirtanen -Version 2 by José Jiménez, en Flickr

[jjimenezpp]

Milky Way over Roque de los Muchachos - La Palma by José Jiménez, en Flickr

[jjimenezpp]

Panoramica desde Llanos de Jable by José Jiménez, en Flickr

[jjimenezpp]

Telescopio Nazionale Gallileo by José Jiménez, en Flickr

[jjimenezpp]

46P/Wirtanen - M45 Pleiades & Geminid by José Jiménez, en Flickr

[G.Chatzifrantzis]

M42 & The Running Man

Equipment :
OTA : Celestron C11 XLT - Starizona Hyperstar f2 - 560mm FL
Mount : EQ8
Camera : Atik 460exc
Guiding : ViewFinder 50mm - Lodestar X2
Filters : Astronomik CLS

SoftWare :
DSS - Pix - Cs

Exposure :
RGB : 2xPanel 40min each

Location : Chalkidiki Greece

[rwittich_de]

46/P Wirtanen

Everybody talks abot Wirtanen. Here is the green comet seen from Germany with the ASI094 at the RASA11.

Click to view full size image

High resolution: https://www.wittich.com/files/starship/Wirtanen_0.jpg

Many galaxies in the background explained: https://www.wittich.com/files/starship/Wirtanen_1.jpg

[SpookyAstro]

The Fiery Red California Nebula, Deep Blue Pleiades and a Green Comet 46P Wirtanen by Transient Astronomer, on Flickr

Image Credit and Copyright Tom Masterson / Grand Mesa Observatory www.grandmesaobservatory.com

[Ma Jin]

Comet 46P & M45
Copyright: Ma Jin
https://farm5.staticflickr.com/4849/456 ... 796d_o.jpg

Image taken on 16th December at Lingyue Temple, Beijing, China

[Ann]

46/P Wirtanen

Everybody talks abot Wirtanen. Here is the green comet seen from Germany with the ASI094 at the RASA11.

Click to view full size image

High resolution: https://www.wittich.com/files/starship/Wirtanen_0.jpg

Many galaxies in the background explained: https://www.wittich.com/files/starship/Wirtanen_1.jpg

Thank you, very interesting!

The comet seems to sport a pair of red Hα tails. Is that correct? Well, maybe the tail on the left side looks more yellow than red. It could just possibly be a dust tail.

Thank you for labeling all those galaxies and stars!

But tell me, what are those objects inside the green and the red circle? The thing inside the green circle looks a little bit like another, still colorless comet to me. The object inside the red circle looks a bit like a galaxy or a planetary nebula.

Very interesting!

Ann