Tag Archives: Gemini

Jellyfish Nebula

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IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light yearsfrom Earth.

IC 443 may be the remains of a supernova that occurred 3,000 – 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

Imaging telescopes or lenses: Takahashi Sky 90
Imaging cameras: Canon / CentralDS EOS 60D
Mounts: Sky-Watcher EQ-6 Skyscan
Focal reducers: Takahashi Sky 90 Flattener/Reducer 407mm
Software: PixInsight, BinaryRivers BackyardEOS
Dates: April 21, 2012
Frames: 12×480″ ISO1600 -15C
Integration: 1.6 hours
Darks: ~14
Flats: ~21
Bias: ~21

Author: Emanuele Todini
AstroPhotography of the day by SPONLI 20 Sep 2014

Jellyfish Nebula in the constellation Gemini

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IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.

The remnant’s age is still uncertain. There is some agreement that the progenitor supernova happened between 3,000 and 30,000 years ago. Recent Chandra and XMM-Newton observations identified a plerion nebula, close to the remnant southern rim. The point source near the apex of the nebula is a neutron star, relic of a SN explosion. The location in a star forming region and the presence of a neutron star favor a Type II supernova, the ultimate fate of a massive star, as the progenitor explosion.

Imaging telescopes or lenses: Orion Optics UK CT8
Imaging cameras: SBIG ST-8300C, SBIG ST-8300M
Guiding telescopes or lenses: Orion Optics UK CT8
Guiding cameras: Starlight Xpress Lodestar guide camera
Focal reducers: Baader Planetarium RCC
Software: Maxim DL, photoshop
Filters: Baader Planetarium 7nm H-Alpha, Hutech IDAS LPS-P2
Accessories: Celestron Radial Guider
Dates: Dec. 3, 2013, Dec. 27, 2013
Frames:
Baader Planetarium 7nm H-Alpha: 26×900″ bin 1×1
Hutech IDAS LPS-P2: 29×600″ bin 1×1
Integration: 11.3 hours

Author: Jacek Bobowik
AstroPhotography of the day by SPONLI 25 June 2014

Open Star Clusters M35 and NGC 2158

16c6da7cbd4b25e9fe1e47028cf9300a.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Jose Fco. del AguilaM35, on the right, is relatively nearby at 2800 light years distant, relatively young at 150 million years old, and relatively diffuse, with about 2500 stars spread out over a volume 30 light years across. An older and more compact open cluster, NGC 2158, on the left. NGC 2158 is four times more distant than M35, over 10 times older, and much more compact with many more stars in roughly the same volume of space. NGC 2158’s bright blue stars have self-destructed, leaving cluster light to be dominated by older and yellower stars. Both clusters are seen toward the constellation of Gemini.

Imaging telescopes or lenses: Sky-Watcher 200/1000 Black Diamond
Imaging cameras: Canon EOS 450D
Mounts: CGEM
Guiding cameras: Lunatico Astronomia QHY5-II
Software: PHD Guiding, Incanus APT – Astro Photography Tool, PixInsight Core 1.8
Dates: Dec. 27, 2013
Locations: Albox
Frames: 24×300″ ISO800 bin 1×1
Integration: 2.0 hours
Darks: ~22
Bias: ~150
Author: Jose Fco. Del Aguila
AstroPhotography of the day by SPONLI 09 May 2014

IC443 in HaOIII and RGB

5851bd20646f2d3d8d207798aa2a1e6f.1824x0_q100_watermark_watermark_opacity-3_watermark_position-6_watermark_text-Copyright Petko Marinov

IC 443 (also known as the Jellyfish Nebula and Sharpless 248) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.
IC 443 is an extended source, having an angular diameter of 50 arcmin (by comparison, the full moon is 30 arcmin across). At the estimated distance of 5,000 ly (1,500 parsec) from Earth, it corresponds to a physical size of roughly 70 light years (20 parsec).

The SNR optical and radio morphology is shell-like (e.g. a prototypical shell-like SNR is SN 1006), consisting of two connected sub-shells with different centers and radii. A third larger sub-shell, initially attributed to IC 443, is now recognized as a different and older (100,000 years) SNR, called G189.6+3.3.
Notably, IC 443 X-ray morphology is centrally peaked and a very soft X-ray shell is barely visible. Unlike plerion remnants, e.g. the Crab Nebula, the inner X-ray emission is not dominated by the central pulsar wind nebula. It has indeed a thermal origin. IC 443 shows very similar features to the class of mixed morphology SNRs. Both optical and X-ray emission are heavily absorbed by a giant molecular cloud in the foreground, crossing the whole remnant body from northwest to southeast.

Imaging telescopes or lenses: Selfmade Super Astrograph 8″ f4
Imaging cameras: SBIG ST- 8300M
Mounts: Skywatcher AZ EQ6 GT
Guiding telescopes or lenses: Selfmade Super Astrograph 8″ f4
Guiding cameras: ALccd5-IIm
Software: Fitswork, Adobe Photoshop CS5
Filters: Baader Planetariun Ha 7nm, Baader Planetarium Blue 1.25″, Baader Planetarium Green 1.25″, Baader Planetarium Red 1.25″, Baader Planetariun OIII 8.5nm
Accessories: TS 9mm OAG, Pal Gyulai Komakorrektor
Dates: Feb. 21, 2014
Frames:
Baader Planetarium Blue 1.25″: 2×600″ bin 2×2
Baader Planetarium Green 1.25″: 2×600″ bin 2×2
Baader Planetariun Ha 7nm: 6×900″
Baader Planetariun OIII 8.5nm: 7×600″ bin 2×2
Baader Planetarium Red 1.25″: 2×600″ bin 2×2
Integration: 3.7 hours

Author: Petko Marinov

16 March 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.

IC443 The Jelly Fish Nebula

f64afd43a41879e6c0be48333454f8a6.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Chris Madson
IC 443
 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.

IC 443 may be the remains of a supernova that occurred 3,000 – 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

Imaging telescopes or lenses: Orion ED80
Imaging cameras: SBIG ST-10 XME
Mounts: Mountain Instruments MI-250
Guiding telescopes or lenses: Orion ED80
Guiding cameras: Starlight Xpress Lodestar
Software: Main Sequence Software Sequence Generator Pro, PHD guiding, PixInsight, photoshop, Foster Systems Astro Alert, Foster Systems AstroMC
Filters: Astrodon Ha 5nm, Astrodon SII 5nm, Astrodon 6nm OIII
Accessories: Astro-Tech 2″ Field Flattener, Orion Thin Off Axis Guider, SBIG CFW 10, Moonlite CF 2″ focuser with high resolution stepper
Dates: Jan. 19, 2014, Feb. 1, 2014, Feb. 2, 2014
Locations: Bone Yard
Frames:
Astrodon 6nm OIII: 9×600″ -25C bin 1×1
Astrodon Ha 5nm: 9×600″ -25C bin 1×1
Astrodon SII 5nm: 9×600″ -25C bin 1×1
Integration: 4.5 hours
Darks: ~20
Bias: ~100

Autor: Chris Madson

AstroPhotography of the day by SPONLI

10 February 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.

Jellyfish Nebula: Galactic supernova remnant

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IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth. IC 443 may be the remains of a supernova that occurred 3,000 – 30,000 years ago. IC 443 is an extended source, having an angular diameter of 50 arcmin (by comparison, the full moon is 30 arcmin across). At the estimated distance of 5,000 ly (1,500 parsec) from Earth, it corresponds to a physical size of roughly 70 light years (20 parsec).

Imaging telescopes or lenses: TecnoSky Apo 70/420
Imaging cameras: Atik 314L+ Mono
Mounts: Skywatcher HEQ5 Pro
Guiding telescopes or lenses: TecnoSky Telescopio Guida 50/168
Guiding cameras: QHY5-II QHY-5 color
Focal reducers: GSO 0.75X
Software: Maxim DL 5 MaxIm DL Pro 5, Adobe Photoshop CS5 Photoshop CS5
Filters: Baader H-alpha 7nm
Dates: Jan. 8, 2014
Frames: Baader H-alpha 7nm : 6×1200″ -10C bin 1×1

Autor: Domenico De Luca

AstroPhotography of the day by SPONLI

03 February 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.