NGC Summer2017-01-31T10:52:41+00:00

Choose from

Autumn
Winter
Spring
Summer

NGC 7142 and NGC 7129

Strong Moonlight interfering but an unexpected clear night so all good. Nice sharp open cluster and 7129 is a HOYS object I image a lot.

Below is a less processed image showing the Moon gradients. By processing them out you definitely lose details.

Object IDNGC 7142 Open Cluster
NGC 7129
Cepheus
Details2021-12-16
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)20 x 280s
darks, flats, bias
CaptureNINA
ProcessingAPP
Photoshop
17 December 2021|Nebula, News, NGC Summer, Open Cluster|

NGC 7538 Tri-band

Looking for more obscure objects again. This is a young star forming region, contains masers too. Very close to the Bubble Nebula but just across the constellation boundary in Cepheus. In the Perseus arm of the Milky Way.

Object IDNGC 7538
DetailsOpen Cluster and Nebula
Cepheus
2021-11-24
Telescope250mm f4.8 Newtonian
MPCC
Tri-band
CameraQHY168C @-15°C
Exposure(s)28x300s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop
26 November 2021|Nebula, News, NGC Summer, Open Cluster|

NGC 6939 & NGC 6946 / C12 Fireworks Galaxy

Cepheus near the border with Cygnus. Bright Moonlight causing some background gradients.

NGC 6939, discovered by William Herschel of course, is quite old for an Open Cluster, between 1 and 1.3 billion years. It also lies about 400 parsecs above the galactic plane, a little unusual for Open Clusters as they are usually within the plane of the galaxy, hence the alternative name of Galactic Clusters.

NGC 6946 (also discovered by William Herschel) is about 25 million light years away and resides in the Virgo Supercluster. It’s known as the Fireworks Galaxy because it seems to be a hive of supernovae; ten have been observed in the 20th and 21st centuries alone. This is about 10 times the rate observed in our own galaxy, even though the Milky Way has twice as many stars. In fact more supernovae have been observed in this galaxy than any other.

During 2009, a bright star within NGC 6946 flared up over several months to become over one million times as bright as the Sun. Shortly thereafter it faded rapidly. Observations with the Hubble Space Telescope suggest that the star did not survive, although there remains some infrared emission from its position. This is thought to come from debris falling onto a black hole that formed when the star died. This potential black hole-forming star is designated N6946-BH1. The progenitor is believed to have been a yellow hypergiant star. Wikipedia

Object IDNGC6939 & NGC 6946 / C12 Fireworks Galaxy
DetailsGalaxy and Open Cluster
Cepheus
2021-11-20
Telescope250mm f4.8 Newtonian
MPCC
Tri-band
CameraQHY168C @-15°C
Exposure(s)25x300s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop
24 November 2021|Galaxy, News, NGC Summer, Open Cluster|

IC5070 Pelican Nebula in narrowband

A star forming region I often image for the HOYS project. Bright moonlight but narrowband keeps most of it out of the image.

Object IDIC5070 Pelican Nebula
DetailsEmission nebula
Cygnus
2021-11-20
Telescope250mm f4.8 Newtonian
MPCC
Tri-band
CameraQHY168C @-15°C
Exposure(s)30x300s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop
24 November 2021|Nebula, News, NGC Summer|

NGC 7008 Fetus Nebula

A planetary nebula with a diameter of 1 ly and about 200 ly away (Wiki says 2800 but parallax says 15.7mas ~200ly). Another William Herschel discovery. You can see the central star is still quite bright but is now a cooler white dwarf. There’s a nice double star system just top right of the nebula, although I suspect from their parallaxes (2.13 mas and 1.97 mas) it’s not a binary system. The nebula is much closer with a parallax of 15.7 so not associated with the double star.

Object IDNGC 7008
DetailsPlanetary Nebula
Cygnus
Mag. 12
Size 1.4’x1.1′
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)7x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop
26 October 2021|News, NGC Summer, Planetary Nebula|