Tag Archives: Cassiopeia


24 ноября


Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive ‘M’ shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a ‘W’ shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper. In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest in from September to early November in its characteristic ‘M’ shape. Even in low southern latitudes below 25ºS is can be seen low in the North.

Imaging telescopes or lenses: ASA10N-OK3 10″ f/3.6 Newtonian Astrograph
Mounts: 10Micron GM2000 QCI
Software: IRIS , PixInsight
Resolution: 1792×1211
Locations: Clemensod
Frames: 6×180″
Integration: 0.3 hours
RA center: 19.551 degrees
DEC center: 58.400 degrees
Pixel scale: 2.194 arcsec/pixel
Orientation: 14.103 degrees
Field radius: 0.659 degrees

Аuthor: Bares

Astrophotography of the day of  SPONLI, 24.11.2014

NGC 281


18 ноября


NGC 281 is an H II region in the constellation of Cassiopeia and part of the Perseus Spiral Arm. It includes the open cluster IC 1590, the multiple star HD 5005, and several Bok globules. Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.

The nebula was discovered in August 1883 by E. E. Barnard, who described it as “a large faint nebula, very diffuse.” The multiple star HD 5005, also called \beta1, was discovered by S. W. Burnham. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 seconds of arc. There has been no appreciable change in this quintuple system since the first measurements were made in 1875.

Imaging telescopes or lenses: TS Optics APO65Q – 65mm f/6.5 Quadruplet Astrographe
Imaging cameras: Atik 314L+ Mono
Mounts: SW HEQ5 Pro Goto
Guiding telescopes or lenses: Chercheur 50mm
Guiding cameras: I-Nova PLA-M
Software: Pixinsight Core 1.8
Filters: Baader OIII 8.5nm 1.25″, Baader Ha 1.25″ Filter 7nm
Resolution: 1341×987
Dates: Oct. 26, 2014, Oct. 31, 2014, Nov. 1, 2014
Baader Ha 1.25″ Filter 7nm: 13×1200″ -10C bin 1×1
Baader OIII 8.5nm 1.25″: 9×1200″ -10C bin 2×2
Integration: 7.3 hours
Darks: ~21
Flats: ~7
Bias: ~101
Avg. Moon age: 5.88 days
Avg. Moon phase: 37.77%
Bortle Dark-Sky Scale: 8.00
Temperature: 12.00
RA center: 13.247 degrees
DEC center: 56.654 degrees
Orientation: -92.640 degrees
Field radius: 0.728 degrees

Аuthor: Dieter333

Аstrophotography of the day of  SPONLI, 18.11.2014

Heart Nebula

The Heart NebulaIC 1805Sh2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing gas and darker dust lanes. The nebula is formed by plasmaof ionized hydrogen and free electrons.
The very brightest part of this nebula (the knot at the right) is separately classified as NGC 896, because it was the first part of this nebula to be discovered.
The nebula’s intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula’s center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun’s mass. The cluster used to contain a microquasar that was expelled millions of years ago.

Imaging telescopes or lenses: Takahashi FSQ-85EDX
Imaging cameras: Canon / CentralDS EOS 60D
Mounts: CGEM
Guiding telescopes or lenses: Borg 50 Achromat 50/250
Focal reducers: Takahashi .73X Reducer QE
Software: PixInsight, BinaryRivers BackyardEOS
Dates: Sept. 9, 2011
Frames: 15×480″
Integration: 2.0 hours

Author: Emanuele Todini
AstroPhotography of the day by SPONLI 19 Sep 2014

NGC 281 in the constellation of Cassiopeia


NGC 281 is an H II region in the constellation of Cassiopeia and part of the Perseus Spiral Arm. It includes the open cluster IC 1590, the multiple star HD 5005, and several Bok globules. Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.

The nebula was discovered in August 1883 by E. E. Barnard, who described it as “a large faint nebula, very diffuse.” The multiple star HD 5005, also called \beta1, was discovered by S. W. Burnham. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 seconds of arc. There has been no appreciable change in this quintuple system since the first measurements were made in 1875.

Imaging telescopes or lenses: GSO RC8
Imaging cameras: Canon EOS 450D / Digital Rebel XSi / Kiss X2
Mounts: Sky-Watcher NEQ6
Guiding telescopes or lenses: Sky-Watcher Equinox 80
Guiding cameras: lacerta mgen2
Focal reducers: AP CCDT67
Software: photoshop, PixInsight, Iris
Accessories: Astronomik ha filter 12nm (EOS clip type), astronomik CLS filter (EOS Clip)
Dates: July 9, 2012, Oct. 30, 2012
Astronomik Clip CLS: 35×300″ ISO400 bin 1×1
Astronomik H-alpha 12nm: 10×300″ ISO400 bin 1×1
Integration: 3.8 hours
Darks: ~22
Flats: ~38
Bias: ~35

Author:  Philippe Mingasson
AstroPhotography of the day by SPONLI 29 July 2014

IC1805 and IC1848 – The Heart and Soul Nebulae


Located in the Perseus Arm of the Galaxy, the Heart nebula (left) and the Soul nebula (right) are two bright nebulae in a region of the Galaxy where a lot of stars are forming. IC 1805 (the Heart nebula) is also sometimes called the ‘Running Dog nebula’ because it is said to resemble a running dog when viewed through a telescope.

Imaging telescopes or lenses: Canon EF 70-200mm f/4L USM
Imaging cameras: Canon EOS 550D / Rebel T2i
Mounts: Skywatcher Neq6 pro synscan
Guiding cameras: QHY5
Software: PHD guiding, Stark Labs Nebulosity 3.1.0, photoshop
Dates: Oct. 10, 2013
Frames: 15×420″
Integration: 1.8 hours

Author: Ivan Jevremovic
AstroPhotography of the day by SPONLI 12 July 2014

The Sun Online and solar activity. July 2, 2014

No C-class (or higher) flares were observed over the last 24 hours, while the x-ray background flux remained close to the C1-level. There are currently 9 sunspot groups visible on the solar disk, with NOAA 2104 and 2107 being the largest and both having a magnetic delta. NOAA 2106 quieted down after its M1-flare from yesterday noon, part of the filament still being present. The CME associated to this flare was mainly directed to the north. It will deliver at most a glancing blow late on 5 July, with little influence on the geomagnetic field expected. Active regions are just behind the east limb, and 2 long filaments are present on the solar disk (one in the southwest quadrant, another about 20 degrees west of NOAA 2107).  
C-class flares are expected, with a chance on an isolated M-class flare.   Solar wind speed decreased from 350 to 300 km/s, while Bz varied between -2 and +2 nT. Geomagnetic conditions were quiet and expected to remain so.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 07/01/14
Time UT: 19:00
Exposure 1/500 sec.

Observatory Sponli


IC 59, IC 63 and Gamma Cas

IC 59 (upper) and IC 63 nebulae lie about 600 light-years distant. They are slowly dissipating under the influence of ionizing ultraviolet radiation from hot, luminous star gamma Cas. Gamma Cas is physically located only 3 to 4 light-years from the nebulae. In fact, slightly closer to gamma Cas, IC 63 is dominated by red H-alpha light emitted as the ionized hydrogen atoms recombine with electrons. Farther from the star, IC 59 shows proportionally less H-alpha emission but more of the characteristic blue tint of dust reflected star light.

Imaging telescopes or lenses: Orion Optics UK CT8
Imaging cameras: SBIG ST-8300C, SBIG ST-8300M
Mounts: Losmandy G11
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 OIII 8.5nm, Baader Planetarium 7nm H-Alpha, Hutech IDAS LPS-P2
Accessories: Celestron Radial Guider
Dates: Oct. 26, 2013, Oct. 31, 2013, Nov. 8, 2013
Baader Planetarium 7nm H-Alpha: 20×900″ bin 1×1
Hutech IDAS LPS-P2: 15×300″ bin 1×1
Baader Planetarium OIII 8.5nm: 10×900″ bin 2×2
Integration: 8.8 hours

Author: Jacek Bobowik
AstroPhotography of the day by SPONLI 26 June 2014

Soul Nebula in Cassiopeia

c461bee8acb1ee756e3d5d78cb5ba068.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-© Peter Folkesson

Soul Nebula  is emission nebulae in Cassiopeia. Several small open clusters are embedded in the nebula: CR 34, 632, and 634 (in the head) and IC1848 (in the body). The object is more commonly called by the cluster designation IC1848. Small emission nebula IC 1871 is present just left of the top of the head, and small emission nebulae 670 and 669 are just below the lower back area.
W5, a radio source within the nebula, spans an area of sky equivalent to four full moons and is about 6,500 light-years away in the constellation Cassiopeia. Like other massive star-forming regions, such as Orion and Carina, W5 contains large cavities that were carved out by radiation and winds from the region’s most massive stars. According to the theory of triggered star formation, the carving out of these cavities pushes gas together, causing it to ignite into successive generations of new stars. The image in the gallery above contains some of the best evidence yet for the triggered star formation theory. Scientists analyzing the photo have been able to show that the ages of the stars become progressively and systematically younger with distance from the center of the cavities.

Imaging telescopes or lenses: Skywatcher Esprit 80ED
Imaging cameras: Canon EOS 600Da
Mounts: Sky-Watcher HEQ5 PRO
Guiding telescopes or lenses: Celestron 80mm Guidescope
Guiding cameras: Sky-Watcher Synguider
Software: PixInsight, Adobe Photoshop, BinaryRivers BackyardEOS
Filters: IDAS LPS-P2
Dates: March 3, 2014
Frames: 8×480″ ISO800
Integration: 1.1 hours
Darks: ~28
Flats: ~40
Bias: ~200

Author: Peter Folkesson

AstroPhotography of the day by SPONLI
17 May 2014

NGC 7635 in the constellation Cassiopeia


NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia.

Amateur observation

With an 8 or 10-inch (250 mm) telescope, the nebula is visible as an extremely faint and large shell around the star. The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision. Using a 16 to 18-inch (460 mm) scope, one can see that the faint nebula is irregular, being elongated in the north south direction.

Imaging telescopes or lenses: GSO Newton 8″ f/5
Imaging cameras: Canon EOS 350D / Digital Rebel XT
Mounts: Sky-Watcher EQ6 Syntreck
Guiding telescopes or lenses: GSO Viewfinder 8X50
Guiding cameras: Orion SSAG
Software: Iris, PHD guiding, photoshop
Filters: Astronomik CLS CCD Filter
Dates: July 22, 2012
Locations: Perigord
Frames: 53×480″
Integration: 7.1 hours

Author: Fredéric Segato

AstroPhotography of the day by SPONLI
8 Abril 2014

IC1795 in Cassiopeia

8663123569477960d37f2ba54e26459d.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Samuli VuorinenIC 1795 is a star forming region in the northern constellation Cassiopeia. Not far on the sky from the famous Double Star Cluster in Perseus, IC 1795 is itself located next to IC 1805, the Heart Nebula, as part of a complex of star forming regions that lie at the edge of a large molecular cloud. Located just over 6,000 light-years away, the larger star forming complex sprawls along the Perseus spiral arm of our Milky Way Galaxy.

Imaging telescopes or lenses: Boren-Simon PowerNewt 8
Imaging cameras: Atik 460EX
Mounts: Sky-Watcher EQ-6 Pro
Guiding telescopes or lenses: Teleskop-Service Finderscope
Guiding cameras: QHYCCD QHY5
Focal reducers: ASA 2″ x 0,73 Corrector/Reducer 2KORRR
Software: PixInsight, Maxim DL, AstroTortilla
Filters: Astronomik SII 12nm, OIII 12nm, Astronomik H-alpha 12nm
Accessories: Lunatico Astronomia Seletek Armadillo
Dates: Jan. 13, 2014
Locations: Komakallio
Astronomik H-alpha 12nm: 5×600″ -25C bin 1×1
OIII 12nm: 5×600″ -25C bin 1×1
Astronomik SII 12nm: 5×600″ -25C bin 1×1
Integration: 2.5 hours
Flats: ~20
Bias: ~500

Author: Samuli Vuorinen

AstroPhotography of the day by SPONLI
2 Abril 2014