Submissions: 2021 April

See new, spectacular, or mysterious sky images.
astrodoc
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Posts: 20
Joined: Sat Mar 15, 2014 7:19 pm

Re: Submissions: 2021 April

Post by astrodoc » Wed Apr 07, 2021 6:00 pm

ImageThree open star clusters in Puppis by Dave & telescope, on Flickr

Three open star clusters in Puppis. I was struck by this beautiful collection which is exactly what I see through my binoculars from a dark site. The field contains the open cluster M46, mostly older stars, the planetary nebula NGC 2438 which hugs the northeast rim of M46 although my understanding is it is not part of the cluster, M47, which contains the younger giant blue stars, and the cluster NGC 2423 just above that. That cluster harbors an extrasolar planet around one of its red giants that I believe was discovered in 2007. The Flickr link contains the image capture details. Location is Mayhill, NM USA
Thanks for looking!

Dave Doctor

Yovin Yahathugoda
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Posts: 16
Joined: Tue Feb 09, 2021 2:56 pm

Re: Submissions: 2021 April

Post by Yovin Yahathugoda » Thu Apr 08, 2021 3:01 pm

Christmas Tree Cluster and Cone Nebula

https://www.astrobin.com/users/YovinRY/
Copyright: Yovin Yahathugoda

Full quality version here: https://cdn.astrobin.com/images/86236/2 ... f7b53b.jpg

Telescope - ASA 500N
Camera: FLI PL16803
Filters: Astrodon E-Series LRGB
Software: Photoshop 2020, PixInsight & Topaz Denoise AI
Location - El Sauce Observatory, Chile

Lum - 4x300s
Red - 4x300s
Green - 4x600s
Blue - 4x600s
Total Exposure time - 1.8 hours
Full acquisition details at https://www.astrobin.com/gcwho9/B/

tala
Asternaut
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Joined: Wed Jan 27, 2021 4:02 pm

Re: Submissions: 2021 April

Post by tala » Thu Apr 08, 2021 5:13 pm

Image

Bode's Galaxy in HaLRGB
Shot again during 3 months due to weather conditions from northern coast of Israel, and overall I'm very happy with the result - the dwarf galaxy and Arp's loop are visible 🥳

Equipment:
- Telescope - GSO RC 8" Carbon Tube
- Camera - ZWO ASI1600mm Pro
- Mount - iOptron CEM70
- Guiding - OAG + ZWO ASI174MM Mini
- Filters - Chroma LRGB + Astrodon H-Alpha 3nm

Details:
- 80x180s for each RGB filter
- 250x300s Luminance filter
- 14x900s H-Alpha filter
Total of ~36.5 hours

https://astrob.in/y5euar/0/
Last edited by bystander on Thu Apr 08, 2021 7:11 pm, edited 1 time in total.
Reason: Please, no hot links to images > 500KB. Substituted smaller image.

Riccardofiuco
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AKA: Riccardo Crescimbeni

Re: Submissions: 2021 April

Post by Riccardofiuco » Fri Apr 09, 2021 3:30 pm

M100 THE BLUE REEL

This rather mystically colored galaxy is 56 million light years from Earth and appears faint in the night sky. Its apparent magnitude of 10.1 means that although it can be seen through small telescopes, it will only appear as a faint patch of light. Larger telescopes can resolve more details of this galaxy. M100 is located in the Coma Berenices constellation and is best observed during the month of May.

ORION UK CT10 f4. 8
10micron GM2000 HPS
Asi294mm
Astronomik L 90X180 "BIN2
bin2 - 15 °
Astronomik RGB 640x 120 "
From the garden of Costalpino Siena
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atomo
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Joined: Sun Jul 26, 2020 4:29 pm

Re: Submissions: 2021 April

Post by atomo » Sat Apr 10, 2021 10:47 am

Hello folks here Carina Nebula.

Telescope: SharpStar 150 f2,8
Guide Scope:Evoguide
Mount : Skywatcher HEQ5
Imaging camera: ZWO 2600MC
Guiding camera: ZWO 290 MC
Filters: IDAS NBZ
Plate solving: SGpro
Imaging software: Sgpro
Guiding software: PHD2
Processing software: Pixinsight
Lpro 150X120s exposure@0Gain
Integration: 5hrs

Davide Mancini,Perth,Australia,08/04/2021


https://cdn.astrobin.com/thumbs/gf2g0ps ... v0RB4y.jpg
Last edited by bystander on Sat Apr 10, 2021 12:32 pm, edited 1 time in total.
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Zaccar_spirit

Re: Submissions: 2021 April

Post by Zaccar_spirit » Sat Apr 10, 2021 10:05 pm

Hi folks,

here is my latest attempt on the Andromeda Galaxy

image taken with a Sony A7s and TS 107/700 APO triplet + 0,75 reducer, all mounted on a Skywatcher AZEQ6 GT:

thanks and clear skies!

ImageM31 by Faouzi Khaled, sur Flickr

KuriousGeorge
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Posts: 183
Joined: Wed Dec 30, 2015 7:07 am
Location: San Diego, CA

Re: Submissions: 2021 April

Post by KuriousGeorge » Sat Apr 10, 2021 10:12 pm

A steady M94 after an unsteady winter. KG Observatory, Julian, CA.

https://www.astrobin.com/a9jzyw/
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Ann
4725 Å
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Joined: Sat May 29, 2010 5:33 am

Re: Submissions: 2021 April

Post by Ann » Sun Apr 11, 2021 4:47 am

KuriousGeorge wrote:
Sat Apr 10, 2021 10:12 pm
A steady M94 after an unsteady winter. KG Observatory, Julian, CA.

https://www.astrobin.com/a9jzyw/
I have been completely lazy (and tired) recently, so I haven't commented on any images in many weeks. But this one is stunning. The colors, the details, plus the fact that I can't help loving this galaxy in any case because of its brilliant inner ring of star formation, which you do beautiful justice.

Thank you so much for this wonderful image! :D :thumb_up:

Ann
Color Commentator

Kinch
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Posts: 142
Joined: Sat Mar 19, 2016 1:53 pm

Re: Submissions: 2021 April

Post by Kinch » Sun Apr 11, 2021 12:07 pm

Another rendition of an old favourite: Rosette Nebula
Rosette (1500 x 1500).jpg
Click on above for larger image.

Full info @: https://www.kinchastro.com/rosette-nebula.html
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jose
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Posts: 81
Joined: Mon Mar 12, 2012 3:06 pm

Re: Submissions: 2021 April

Post by jose » Sun Apr 11, 2021 6:24 pm

http://astronomiadejos4.webcindario.com ... nombre.jpg
hola a todos a todos:
os dejo una foto que hice en el año 2015, la he vuelto a procesar y creo que la he mejorado, os dejo el resultado.
Estos son los datos:
TOMAS:
H alfa: 20 Light de 900 segundos; 30 flats, 20 darks y 50 bias
TEMPERATURA: -10 GRADOS
TUBO: FSQ 106 ED
CCD: SBI G ST-8300M
MONTURA: CGEM
CCD guiar: QHY5II

Un saludo
Last edited by bystander on Mon Apr 12, 2021 12:45 am, edited 1 time in total.
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Bobinius
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Re: Submissions: 2021 April

Post by Bobinius » Sun Apr 11, 2021 7:59 pm

Galactic Rendez-vous : NGC 2992 and NGC 2993

Copyright: Bogdan Borz

ARP 245 is a couple of gravitationally interacting galaxies, discovered by William Herschel in 1785. They are located in the Hydra constellation. NGC 2992 is an active Seyfert galaxy (it has a compact and dense core, an important source of electromagnetic radiation). They are situated at around 105 million l-y away (Wikipedia).

Telescope : ASA - Astro Systeme Austria ASA 500m Newtonian f3.8
Camera : FLI PROLINE PL16803
Processing : Pleiades Astrophoto PixinsIght · PhotoShop

Acquisition details : L 14 x 600s, R 9 x 600s, G 7 x 600s, B 7 x 600s @ -30°
Dates : 3 March, 10 March, 1 April 2021
Total : 6.2 h
Location: Chilescope, Rio Hurtado, Chile
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lizarranet
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Joined: Thu Feb 09, 2012 8:25 am

Re: Submissions: 2021 April

Post by lizarranet » Sun Apr 11, 2021 9:25 pm

GUM Nebulas and SNR in Vela

8 panel mosaic covering 11x7 degrees.
LRGB+Ha+[O IIII] composition

Taken from Deep Sky Chile

Copyright: Mikel Martinez & Cèdric Thomas


ImageNebulas and SNR in Vela by Mikel Martínez, en Flickr

logandc99
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Posts: 11
Joined: Wed Jan 20, 2021 7:06 am

Re: Submissions: 2021 April

Post by logandc99 » Mon Apr 12, 2021 4:10 am

IC2944 The Running Chicken Nebula

IC2944, also known as the Running Chicken Nebula is an open cluster with an associated emission nebula in the constellation Centaurus.
Within this nebula are a set of Bok globules, also known as Thackeray’s Globules.
These dark floating globules are thought to be dense clumps of gas that are sites of active star formation although there seems to be
some doubt regarding evidence for star formation in the globules of IC2944. These globules are being eroded away by powerful UV radiation
expelled from luminous, massive stars (ref NASA).

ImageIC2944 by Logan Carpenter, on Flickr

Telescope: Skywatcher Esprit 120ED
Mount: iOptron CEM60
Camera: ASI1600mm pro
Filters : Optolong HA, OIII and SII narrownband

Total integration 11.9 hours

Taken from Auckland, New Zealand

Astrobin : https://youtu.be/EGGR3fpfUR4

Wissam Ayoub
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Joined: Tue Oct 13, 2020 5:40 pm

Re: Submissions: 2021 April

Post by Wissam Ayoub » Mon Apr 12, 2021 5:13 am

M82 - The Cigar Galaxy
Taken with my 10" RC in 5.6 hours.

Image

https://flic.kr/p/2kSk69H
https://astrob.in/hrqwia/0/

Imaging telescope: Teleskop Service TS 10" RC.
Imaging camera: ZWO ASI294MM-Pro.
Mount: iOptron CEM60.
Guiding camera: ZWO ASI290MM mini.
Focal reducer: Teleskop Service CCD47 0.67x reducer for RC telescopes.
Accessory: ZWO ASIAIR Pro · ZWO OAG · ZWO 8x 1.25" Filter Wheel (EFW).
Frames:
Astrodon Gen2 E-Series Tru-Balance Lum: 20x180" (gain: 120.00) -15C bin 2x2.
Astrodon Gen2 E-Series Tru-Balance Red: 20x180" (gain: 120.00) -15C bin 2x2.
Astrodon Gen2 E-Series Tru-Balance Green: 18x180" (gain: 120.00) -15C bin 2x2.
Astrodon Gen2 E-Series Tru-Balance Blue: 20x180" (gain: 120.00) -15C bin 2x2.
Chroma 3nm Ha: 10x600" (gain: 200.00) -15C bin 2x2.
Total integration: 5.6 hours.
Darks: ~50.
Flats: ~30.
Flat darks: ~30.
Avg. Moon age: 26.66 days.
Avg. Moon phase: 9.26%
Bortle Dark-Sky Scale: 4.00.
RA center: 9h 55' 52"
DEC center: +69° 40' 56"
Pixel scale: 0.707 arcsec/pixel.
Orientation: -95.583 degrees.
Field radius: 0.150 degrees.
Imaging dates: April 8, 2021, April 9, 2021.
Imaging location: Abu Dhabi desert, UAE.
Copyright: Wissam Ayoub.

Thank you,

Jean-Baptiste Auroux
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Posts: 46
Joined: Tue Nov 14, 2017 10:06 pm

Re: Submissions: 2021 April

Post by Jean-Baptiste Auroux » Tue Apr 13, 2021 8:59 am

M108 & M97 : cosmic perspective...
Full version : https://astrob.in/full/1tfozj/0/?nc=Jea ... aris&real=

A classic of the spring sky: the duo of the galaxy M108 with the Owl planetary nebula (M97) in Ursa Major.
M97 is 2000 LY away, while M108 is 32 millions LY away (16.000 times more distant).

I completed the LRGB with exposures with Ha and especially OIII, in order to gain signal on M97: the much more faint outer ring of M97, not so often seen, is visible.

Takahashi TSA102 - AZEQ6 - Atik Cameras AtikOne 6.0 - Filters Astronomik (6nm Ha / OIII)
L : 36 x 600s bin1
RGB : 3 x 24 x 300s bin 2
Ha : 12 x 600s bin 1
OIII : 18 x 600s bin 1 + 12 x 600s bin2
Total : 19h
3, 4 & 5 april 2021 - Fouras (France)
Traitement : Pixinsight & Photoshop

Copyright: Jean-Baptiste Auroux
https://millenniumphoton.com/
https://www.astrobin.com/users/Jean-Baptiste_Paris/

Yovin Yahathugoda
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Posts: 16
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Re: Submissions: 2021 April

Post by Yovin Yahathugoda » Tue Apr 13, 2021 3:18 pm

Crab Nebula

https://www.astrobin.com/users/YovinRY/
Copyright: Yovin Yahathugoda
Full quality version here: https://cdn.astrobin.com/images/86236/2 ... 67b27e.jpg

Telescope - Planewave CDK24
Camera: FLI ProLine PL9000
Filters: Astrodon Ha 3nm, Astrodon OIII 3nm, Astrodon SII 3nm
Software: Photoshop 2020, PixInsight & Topaz Denoise AI
Location - El Sauce Observatory, Chile

Lum - Synthetic Luminance
Halpha -10x120s, 10x300s
OIII - 10x120s, 10x300s
SII - 10x120s, 10x300s
Total Exposure time - 3.5 hours
Full acquisition details at https://www.astrobin.com/6ldnau/0/

talbotj
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Posts: 41
Joined: Wed Dec 15, 2010 11:22 pm

Re: Submissions: 2021 April

Post by talbotj » Tue Apr 13, 2021 5:56 pm

Sh2-239, Star forming region in the Taurus Molecular Cloud

Full res and details: http://www.starscapeimaging.com/Sh2-239 ... 2-239.html

Copyright: Jonathan Talbot

Image

KuriousGeorge
Science Officer
Posts: 183
Joined: Wed Dec 30, 2015 7:07 am
Location: San Diego, CA

Re: Submissions: 2021 April

Post by KuriousGeorge » Tue Apr 13, 2021 5:58 pm

The Sunflower Galaxy. KG Observatory, Julian, CA.

Fortunately the good weather held out for a few more days to squeeze out one more object during the April dark cycle. (-: The fog and rain returned last night.

The challenge here was to expose the very faint tidal streams without overexposing the galaxy. Fortunately the Kodak 16803 chip permits this with 900s exposures. A 21.6+ sky helps too (i.e., fog at lower altitudes during April, May and June helps shield the San Diego city lights).

The 24 900s L frames used here were between 1.67"and 2.26".

I took lots of color this time for more precise color reproduction (less noise) in the very dim areas. Color subs were VERY steady. I could actually find a combo of 28 900s color and L subs between 1.4" and 2.0" to make a hybrid luminance. That helped improved the stacked result by about .4" over the 24 900s L subs. But it was noisier, and after deconvolution, the 24 L subs gave a better overall result with less noise. This also helped me avoid any processing artifacts resulting from overlaying hybrid L over pure L in the high SNR areas.

FWIW, after looking at the 8:8:8 R:G:B data vs the 16:16:16 R:G:B data, the noise improvement is very subtle when the skies are this dark. I think my time would have been better spent capturing 1800s L data for less noise in the tidal areas. I was hoping to do that last night and actually captured 20 x 1800s dark calibration subs for that. But the weather turned on me. Next time for sure. (-:

About 2 hours of Ha was screened over the top. This added a subtle red hue to the central area with the brighter star-forming regions enhanced very slightly. The dark R data seemed to already be doing a good job for the Ha regions.

"M63, also known as NGC 5055 or the Sunflower Galaxy, is a spiral galaxy in the northern constellation of Canes Venatici with approximately 400 billion stars.

The shape or morphology of this galaxy has a classification of SAbc, indicating a spiral form with no central bar feature (SA) and moderate to loosely wound arms (bc). There is a general lack of large-scale continuous spiral structure in visible light, so it is considered a flocculent galaxy. However, when observed in the near infrared, a symmetric, two-arm structure is seen. Each arm wraps 150° around the galaxy and extends out to 13,000 light-years from the nucleus.

Radio observations at the 21-cm hydrogen line show the gaseous disk of M63 extends outward to a radius of 130,000 light-years, well past the bright optical disk. This gas shows a symmetrical form that is warped in a pronounced manner, starting at a radius of 33,000 light-years. The form suggests a dark matter halo that is offset with respect to the inner region. The reason for the warp is unclear, but the position angle points toward the smaller companion galaxy, UGC 8313.

The distance to M63, based upon the luminosity-distance measurement is 29,300,000 light-years."

https://www.astrobin.com/19c4rk/
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KuriousGeorge
Science Officer
Posts: 183
Joined: Wed Dec 30, 2015 7:07 am
Location: San Diego, CA

Re: Submissions: 2021 April

Post by KuriousGeorge » Tue Apr 13, 2021 6:02 pm

Ann wrote:
Sun Apr 11, 2021 4:47 am
KuriousGeorge wrote:
Sat Apr 10, 2021 10:12 pm
A steady M94 after an unsteady winter. KG Observatory, Julian, CA.

https://www.astrobin.com/a9jzyw/
I have been completely lazy (and tired) recently, so I haven't commented on any images in many weeks. But this one is stunning. The colors, the details, plus the fact that I can't help loving this galaxy in any case because of its brilliant inner ring of star formation, which you do beautiful justice.

Thank you so much for this wonderful image! :D :thumb_up:

Ann
Thank you so much Ann! I'm very thrilled and humbled by your comment. Your comments are always so helpful, informative and much appreciated. :D

twoghouls
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Posts: 10
Joined: Tue Jun 27, 2017 7:21 pm

Re: Submissions: 2021 April

Post by twoghouls » Tue Apr 13, 2021 9:59 pm

Image

Mars passing by Auriga by Nico Carver (NebulaPhotos.com), on Flickr

Mars (left side) lined up nicely with the bright blue star Elnath (center) in this photo taken on Saturday, April 10th. Some red nebulae like Sh2-240, Sh2-229, Sh2-236, etc. are also visible. 2 hours integration (250*30 seconds). Canon Ra, Canon RF 85mm f/1.2 stopped to f/2.

Copyright: Nico Carver (NebulaPhotos.com)

afmolinam
Asternaut
Posts: 6
Joined: Tue Jan 21, 2020 5:36 am

Re: Submissions: 2021 April

Post by afmolinam » Wed Apr 14, 2021 12:09 am

Image

The Orion constellation ending their season


https://flic.kr/p/2kSNsbN
Copyright: Andres Molina

Click to view full size image
At this latitude the Orion constellation ends their season at the mid of may, meanwhile we enjoy a last view of their deep sky objects.


10/04/2021

Desierto de la Tatacoa, Huila, Colombia

Gear: Camera Canon 70D + Canon 40D fullspectrum
Lens: YN 50mm f/1.4 at f/2
Mount: Ioptron CEM25P

Image: 3x120s + 25x30 exposure image, calibrated with dark, bias
Stacked and process Pixinsight 1.8, Photoshop CC 2021

ImNewHere
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Posts: 11
Joined: Fri Apr 24, 2020 12:32 am

Re: Submissions: 2021 April

Post by ImNewHere » Wed Apr 14, 2021 12:53 am

NGC 6729 (also known as Caldwell 68) is a reflection/emission nebula in the constellation Corona Australis. It was discovered by Johann Friedrich Julius Schmidt in 1861. This image also contain NGC 6726, NGC 6727, IC 4812, and the globular cluster NGC 6723. located to the upper left of IC 4812 and a planetary nebula shown as a red circle can also be seen in this image locate to the right of IC 4812. Part of the Corona Australis molecular complex is also shown in this image.

ImageNGC6723_NGC6729_LRGBv3 by Scotty Bishop, on Flickr

Details Image

Llama
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Posts: 22
Joined: Sun Jun 14, 2020 7:57 pm

Re: Submissions: 2021 April

Post by Llama » Wed Apr 14, 2021 6:25 am

The Giant Blue Stars of NGC 3109

Copyrights: Nicolas Rolland & Martin Pugh
Full resolution here

Image
The Giant Blue Stars of NGC 3109 by Nicolas Rolland, sur Flickr

NGC 3109 is classified as a small barred Magellanic type spiral or irregular galaxy 4.3 million light years from Earth. NGC 3109 has a mass of about 2.3×10 ^9 times the mass of our Sun, of which 20% is in the form of neutral hydrogen.

NGC 3109 has a mass of about 2.3×109 times the mass of the Sun, of which 20% is in the form of neutral hydrogen. It is oriented edge-on from our point of view, and may contain a disk and a halo. The disk appears to be composed of stars of all ages, whereas the halo contains only very old and metal-poor stars. NGC 3109 does not appear to possess a galactic nucleus.

From measurements of the neutral atomic hydrogen in the galaxy, it has been found that the disk of NGC 3109 is warped. The warp has the same radial velocity as gas in the Antlia Dwarf galaxy, indicating that the two galaxies had a close encounter approximately one billion years ago

RA: 10h 03m 07.5s
DEC: -26° 09’ 43"
Size: 40.1 x 27 arcmin
Orientation: Up is 134 degrees E of N
Location: Hydra
Distance: 4.3 Mly
Magnitude: 10.4

Acquisition January 2021
Total acquisition time of 29.3 hours.

Technical Details
Location: El Sauce Observatory, Rio Hurtado, Chile
L 22 x 1200 sec
R 15 x 1200 sec
G 15 x 1200 sec
B 15 x 1200 sec
Ha 14 x 1800 sec
Optics: Planewave 17“ CDK @ F6.8
Mount: Paramount ME
CCD: SBIG STXL-11002 (AOX)
Pre Processing: CCDstack & Pixinsight
Post Processing: Photoshop CC

Kinch
Science Officer
Posts: 142
Joined: Sat Mar 19, 2016 1:53 pm

Re: Submissions: 2021 April

Post by Kinch » Wed Apr 14, 2021 12:28 pm

Under overcast skies....I continue to see old images in a new light: This is SH2-284 : (Reprocessed April 2021)
SH2-284 (1030 x 1396).jpg
Click on above to enlarge.

Info @ https://www.kinchastro.com/sh2-284.html
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Paulee97
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Joined: Thu Sep 22, 2016 4:18 pm
AKA: Paulee
Location: Brno, Czech Republic

Re: Submissions: 2021 April

Post by Paulee97 » Thu Apr 15, 2021 11:41 am

Young Moon over Gran Canaria
Copyright: Pavel Váňa

When you are visiting Canary islands you have to be lucky when there is no Saharan sand in the air. In this case you can enjoy treasures of night sky. This is a beautiful memory that contains good feelings from finding new beautiful photographic spot in Gran Canaria.
Technical data: It is a single with exposure time 2s at ISO 1250. I have used Canon EOS 6D mod., Canon EF 50mm f/4.

ImageYoung Moon over Gran Canaria by Pavel Váňa