Open Cluster

M45 ASERO

2024-01-13T22:03:19+00:0021 November 2023|ASERO, M31-60, News, Open Cluster|

More nebulosity and dust than I can ever get from Edinburgh. It was also chosen as the BAA’s Deep Sky Picture of the Month

Object IDM45 Pleiades
Details19/20 November 2023
TelescopeSharpstar 94 mm f/4.4 Triplet Apo
JTW Trident P75 mount
CameraToupTek Colour IMX571
FiltersOptolong L
Exposure(s)509 x 60s exposures
CaptureNINA
ProcessingProcessed in Siril and PS

NGC 436 Cassiopeia

2023-02-23T09:50:40+00:0023 February 2023|News, NGC Autumn, Open Cluster|

No real reason for doing this, just a nice open cluster in Cassiopeia and thought I’d do some photometry on some of the cluster stars using ASTAP, which I did.  I chose a Be star (2MASS J01154089+5849021 / Cl* NGC 436 BOD 54) but nothing revealed on that, or any of the other stars I chose. But then again it would have been lucky!

Object IDNGC 436
Details2023-02-22  22:15 UT
Telescope250mm f4.8 Newtonian
MPCC
CameraAtik 460EX @-10°C
FiltersV photometric
Exposure(s)20 x 180s
CaptureNINA
ProcessingAPP, Photoshop, ASTAP

Collinder 26 – the heart of the Heart Nebula

2022-10-11T14:40:27+00:0027 September 2022|Nebula, News, NGC Autumn, Open Cluster|

Ha view of this interesting star forming region at the heart of the Heart Nebula. Various designations for the open cluster including Melotte 15 and IC 1805. The emissions from the Heart Nebula are driven by radiation from the young stars in this cluster.

Object IDCollinder 26
IC 1805
Melotte 15
Details2022-09-26
Telescope250mm f4.8 Newtonian
MPCC
CameraAtik 460EX @-10°C
FiltersBaader Ha
Exposure(s)20 x 300s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

NGC 7142 and NGC 7129

2021-12-24T16:41:36+00:0017 December 2021|Nebula, News, NGC Summer, Open Cluster|

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

NGC 7538 Tri-band

2021-12-08T09:22:08+00:0026 November 2021|Nebula, News, NGC Summer, Open Cluster|

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

NGC 6939 & NGC 6946 / C12 Fireworks Galaxy

2021-12-08T09:22:36+00:0024 November 2021|Galaxy, News, NGC Summer, Open Cluster|

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

The Tribble Nebulae NGC1624/Sh2-212 and Sh2-211

2021-12-08T09:23:22+00:0016 November 2021|Dark nebula, Nebula, News, NGC Autumn, Open Cluster|

An obscure one in Perseus. The larger is open cluster inside an emission nebula NGC 1624, also known as emission nebula Sh2-212, the smaller Sh2-211. Now known as the Tribble Nebulae after “Star Trek: The Trouble with Tribbles”. The dark patch top right is the dark nebula Barnard 20.

Object IDThe Tribble Nebulae NGC1624/Sh2-212 and Sh2-211
Dark nebula Barnard 20
DetailsOpen Clusters
Emission nebulae
Perseus
2021-11-12
Telescope250mm f4.8 Newtonian
MPCC
Tri-band
CameraQHY168C @-15°C
Exposure(s)15x300s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

Double Cluster NGC 869 and NGC 884 / C14

2021-12-24T12:42:15+00:0016 November 2021|Caldwell, News, NGC Autumn, Open Cluster|

Revisiting an old friend. Two rich open clusters at similar distances from us of 7,500 light years.

Object IDDouble Cluster NGC 869 and NGC 884 / C14
DetailsOpen Clusters
Perseus
2021-11-12
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)20x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

NGC 752 / C28 Open Cluster

2021-12-08T09:23:51+00:0010 November 2021|Caldwell, News, NGC Autumn, Open Cluster|

Looks ordinary but lots of interest in there if you dig a bit deeper – obviously not all associated with the cluster but just in the fov. Includes a fair number of galaxies, spectroscopic binaries, X ray sources, galaxy groups, radio sources, ir sources, stars with high proper motions. The cluster itself contains about 258 stars, mostly low mass in the main sequence or red giant stage. About 1300 ly away and just on the edge of naked eye visibility at mag. 5.7.

Object IDNGC 752 / C28
DetailsOpen Cluster
Andromeda
Mag.5.7
Size 75′
2021-11-01
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)10x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

M52 & Bubble Nebula

2021-01-25T14:45:44+00:0025 January 2021|M31-60, Narrowband, Nebula, News, NGC Autumn, Open Cluster|

Strong moonlight

Object IDM52 and NGC 7635
Cassiopeia
Details2021-01-23
Mag. 6.9, 10.0
Size 13′, 15’x8′
Telescope250mm f4.8 Newtonian
MPCC
CameraQHY168C @-15°C
Tri-band
Exposure(s)20x300s
2/20 gain/offset
darks, flats, bias
CaptureNINA
ProcessingAPP, Photoshop, Topaz DeNoise AI

Cone Nebula and Christmas Tree cluster

2020-12-22T20:50:01+00:0022 December 2020|Nebula, News, NGC Winter, Open Cluster|

Problems with ice of dew somewhere, had to heavily crop this to remove rings and artefacts. Strange colouring also part of the problem. Not great!

Object IDNGC2264
Details2020-12-21
Telescope250mm f4.8 Newtonian
MPCC
CameraQHY168C @15°C
IDAS P2
Exposure(s)30x180s
darks, flats, dark-flats
CaptureNINA
ProcessingAPP, Photoshop, Topaz DeNoise AI

NGC188 (C1)

2020-04-07T21:23:16+00:007 April 2020|Caldwell, News, NGC Winter, Open Cluster|

Never noticed this one before. Very close to the pole so easy guiding as nothing moves very much round there.

Object IDNGC188, Caldwell 1
Open Cluster, Cepheus
Mag. 10
Size 11′
Details2020-04-06 22:42 UT
Telescope250mm f4.8 OO Newtonian
CameraATIK 460EX @-15C
Exposure(s)3x180s 1×1 TR, 2x180s 1×1 TG, TB
Darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

NGC 2264 Christmas Tree Cluster narrowband

2019-01-30T13:16:31+00:0030 January 2019|HOYS, Nebula, News, NGC Winter, Open Cluster|

After a HOYS-CAPS session added narrowband. Rat’s head in there?
No more MPCC and stars are much sharper at the edges.

Object IDNGC 2264, Christmas Tree Cluster
Details2019-01-29
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-20C
Baader Ha, OIII, SII filters
Exposure(s)10x300s 2×2 each
Darks
CaptureAPT
ProcessingNebulosity, Photoshop
SHO colour mapping

M44 Praesepe / Beehive cluster

2019-01-30T14:43:15+00:007 January 2019|M31-60, News, Open Cluster|

Poor night of transparency and seeing so just got this in the passing. Lots of sky fog that got processed out.

Object IDM44 / Praesepe / Beehive cluster, Cancer
Details2019-01-07
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX
Baader RGB filters
Exposure(s)10x60s each RGB 2×2
Darks
CaptureAPT
ProcessingNebulosity, Photoshop

NGC 752

2018-09-22T12:27:08+00:0022 September 2018|News, NGC Autumn, Open Cluster|

Heavy processing to remove moonlight background. First entry in the SAA 100 catalog.

Object IDNGC 752
Open Cluster, Andromeda
Mag. 5.7, size 50′
Details2018-09-21
Bright 90% Moon
Telescope200mm f5 Newtonian, MPCC
IDAS P2 LPR filter
Guided
CameraCanon 600D
Exposure(s)10x40s, ISO 800, darks, flats
CaptureAPT
ProcessingNebulosity, Photoshop