Arp188 or the Tadpole Galaxy

The Tadpole Galaxy is a disrupted barred spiral galaxy located 420 million light-years from Earth toward the northern constellation Draco. Its most dramatic feature is a massive trail of stars about 280,000 light-years long; the size of the galaxy has been attributed to a Galaxy merger with a smaller galaxy which is believed to have occurred about 100 million years ago. Because of its great distance from Earth, the apparent size is only 3.6 x 0.8 arcmins.
Click on the picture and see if you can spot the Tadpole galaxy in the wide-field view.

Arp188 or the Tadpole Galaxy

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 65x5min L + 29x5min each for RGB
Date: May 2017
Location: Southern Alps, France

Data acquisition: Karel Teuwen and Bart Delsaert
Processing: Bart Delsaert

vdB 152

van den Berg (vdB) 152 is an elongated molecular cloud 1,400 light years distant in the constellation of Cepheus. It is sufficiently dense in localized areas to block all light from stars from reaching us. In other areas, some stars shine through. Its reddish color is largely due to light scattering off dust particles within the cloud. This preferentially scatters light of shorter wavelengths and lets redder light through. The tip of the cloud near the center of the image is reflecting blue light from a nearly embedded star.

vdB 152

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 56x5min L + 18x5min each for RGB
Date: April – May 2017
Location: Southern Alps, France

 

NGC5371 and Hickson 68

Compact Galaxy Groups have always been of interest to astronomers ever since Stephan discoverd his famous Stephan’s Quintet in 1877. The Hickson Compact Galaxy Groups were compiled by Paul Hickson and published in his Atlas of Compact Groups of Galaxies in 1994. There are exactly 100 entries. NGC 5371 is a face-on spiral galaxy in the constellation Canes Venatici. NGC 5371 (which also seems to be known as NGC 5390) is a symmetrical face-on Sbc barred spiral galaxy at a distance of 100 million light years. This galaxy with Hickson Galaxy Group 68 makes up the Big Lick Galaxy Group.

NGC5371 (left) and Hickson 68 (right)

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 58x5min L + 17x5min each for RGB
Date: April – May 2017
Location: Southern Alps, France

The Hercules Cluster of Galaxies

Spring is typically the time of year for galaxy hunting. So why not try to capture as many galaxies as possible in one single frame? When you point your telescope in between the constellations of Hercules and Serpens you might come pretty close to the expectations.
The Hercules Cluster of Galaxies contains about 200 member galaxies, some 500 million light-years distant, with a wide range of mostly spiral galaxies, a smaller number of elliptical galaxies, and a healthy collection of colliding galaxies. This image clearly shows the contrasting colors of younger star forming galaxies which are primarily blue, while older galaxies are mostly yellow.

Hercules Cluster or Abel 2151

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 75x5min L + 35x5min each for RGB
Date: March – April 2017
Location: Southern Alps, France

Data acquisition: Karel Teuwen and Bart Delsaert
Processing: Bart Delsaert

Update May 2nd, 2017: I’ve created an inverted, annotated image of the area. The annotations are coming from the NGC, IC and PGC catalogues. The PGC catalogue goes up to magnitude 18, but you can clearly see a lot of much fainter galaxies without catalogue number.

NGC3718: This galaxy is twisted – revisited

About three years ago I posted a picture of NGC3718, which I took from my suburban, light polluted, home observatory. Here’s a link to that post.
As second light from my remote observatory I revisited this peculiarly shaped galaxy but now with better equipment and, most importantly, far better skies. I think the differences are obvious.

NGC3718

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 63x5min L + 20x5min each for RGB
Date: March – April 2017
Location: Southern Alps, France

And here’s a cutout: