Amateur Astronomy from Edinburgh2022-05-29T11:18:50+00:00

Forthimage – Amateur Astronomy from Edinburgh

This website is an observing log and a place where I can post my images and observations. You can find more information about the equipment I use on the About/Equipment page as well as papers I am co-author of.

Having imaged many of the obvious objects I find it more satisfying now to contribute data to various projects.

I stand with UkraineI am currently President and Webmaster of the Astronomical Society of Edinburgh and some of my pictures are displayed on their Flickr page.

I contribute data to the HOYS citizen science project, ExoClock, BAA Mars, Solar and VSS sections, AAVSO, GOSA, GMN, UKMON, as well as others.

Mark

Recent posts

2022 UK006E monthly reports

2 June 2022|Meteorcam, Meteors, News|

Reports generated by UKMON
https://ukmeteornetwork.co.uk

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V1117 Her

29 May 2022|News, Variable Star|

Taking part in the AAVSO campaign on V1117 Her: Alert Notice 771: V1117 Her in deep fade again. Comparisons marked in the main image.

The fade seems to be past but as well as long term variations it seems to be a star with short-term variations over periods of a few hours. An “…anomalous YSO (possibly debris-disc object)”.

Object IDV1117 Her
DetailsYSO (Young Stellar Object)
Range approx: 12.3 – 13.9
Coordinates (2000): RA 16 39 06.43 Dec. +09 47 55.3
Telescope250mm f4.8 Newtonian
MPCC
CameraAtik 460EX @-10°C
FiltersJohnson V
Exposure(s)5 x 60s
d f b
CaptureNINA
ProcessingASTAP

“The anomalous YSO (possibly debris-disc object) V1117 Herculis is at a deep minimum of visual magnitude 15.1 as of 2022 March 9.45 UT, from observations by AAVSO member John Pickett. Observations, in a variety of filters – visual observations included of course – are requested to see what happens next. Deep minima of this object have tended to occur at semi-regular intervals of about 400 days but the last comparable minimum drawn from the AAVSO light curve was only about 100 days ago, so this may indicate new processes are taking place in the circumstellar environment.”

“Observations in the B and I bands are especially welcome. V band photometry is encouraged, and visual observations are welcome. Observations two-three times per night are requested (and once per night between episodes of activity).”

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DO Dra

12 May 2022|News, Variable Star|

AAVSO “Alert Notice 753: Monitoring requested for seven intermediate polars” – DO Dra (also known as YY Dra) is on the list, it’s circumpolar and easy from here.

“Photometry (V, CV) of the targets in the table below is requested. DSLR green and visual observations are welcome to supplement the light curves. The cadence requested is every other night, as weather permits, and “about one hour of coverage per night (enough to catch a few spin cycles of the white dwarf). If a source is found to be in a low state, then we request longer coverage and nightly cadence. SNR>>10 is ideal…”

Photometry (V, CV) of the targets in the table below is requested. DSLR green and visual observations are welcome to supplement the light curves. The cadence requested is every other night, as weather permits, and “about one hour of coverage per night (enough to catch a few spin cycles of the white dwarf). If a source is found to be in a low state, then we request longer coverage and nightly cadence. SNR>>10 is ideal…”

Covington adds: “These systems show periodic variability on the spin period of the WD, usually on order of ~10 minutes. So, shorter exposure times are needed so the spin variability isn’t washed out. Previous AAVSO observations of these sources have had exposure times <60s, which is ideal. Also, accurate time tagging of the observations is required, so we can measure periodicities!”

Thought I’d give it a go for 1 hour. Uploaded to AAVSO and BAA databases.

Object IDDO Dra
Typical/high state mag. 15.0 – 15.5 V
Range: 10.0 – 17.2 V
Details23:00 – 23:59 UT
Telescope250mm f4.8 Newtonian
CameraAtik 460ex @-10°C
FiltersV photometric
Exposure(s)70 x 60s
dfb
CaptureNINA
ProcessingASTAP

An Intermediate Polar (also called a DQ Herculis Star) is a type of cataclysmic variable binary star system with a white dwarf and a cool main-sequence secondary star. In most cataclysmic variables, matter from the companion star is gravitationally stripped by the compact star and forms an accretion disk around it. In intermediate polar systems, the same general scenario applies except that the inner disk is disrupted by the magnetic field of the white dwarf.

The name “intermediate polar” is derived from the strength of the white dwarf’s magnetic field, which is between that of non-magnetic cataclysmic variable systems and strongly magnetic systems. Non-magnetic systems exhibit full accretion disks, while strongly magnetic systems (called polars or AM Herculis systems) exhibit only accretion streams which directly impact the white dwarf’s magnetosphere.

Wikipedia

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AR2993 AR2994

19 April 2022|News, Sun|

Request for observations as these groups develop from the BAA. Managed 8 days in a row!

Object IDSun AR2993, AR2994
Details2022-04-18 – 2022-04-25
Telescope250mm f4.8 Newtonian
Black polymer filter + R
CameraZWO ASI290MC
Exposure(s)90 – 120s ser video
40% / 20% / 25% frames
CaptureFireCapture
ProcessingAS3!, Registax, Photoshop
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Type Ia supernova 2022hrs in NGC 4647

19 April 2022|News, Supernova|

2022hrs (= ATLAS22mip), TNS discovered 2022/04/16.619 by Koichi Itagaki
Found in NGC 4647 at R.A. = 12h43m34s.350, Decl. = +11°34’36”.00
Located 30″.0 east and 18″.7 south of the center of NGC 4647
Galaxy is about mag. 12.5, supernova about mag. 14.1 R  using photometry with ASTAP.

Object IDSupernova 2022hrs
Details2022-04-18 23:20 UT
Telescope250mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)3 x 180s
d,f,b
CaptureNINA
ProcessingPhotoshop, ASTAP

Here’s the light curve from the BAA VSS database, including some of my observations (the very first red point – bottom left – is mine, as are some of the V CCD measurements).

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GMN meteor plot 2022-03-27 22:36:11.685049

28 March 2022|Meteorcam, Meteors, News|

A bright meteor, captured by my camera UK006E, also seen and matched by 8 other stations.

Mag. -2.90
Duration 1.20s
V avg 42.97 km/s
Height beg/end: 111 km / 86 km
Sporadic

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HOYS and 2MASS 21383981+5708470

25 March 2022|HOYS, News|

I’ve been continuing to gather HOYS data as normal and particularly focusing on this star as it’s a bit too low for most people in the evening, but high enough even when below the Pole Star from here in Edinburgh. A lot of the last few weeks data points are mine. Going back to the CCD camera and using real V and R photometric filters has increased accuracy to 0.02 – 0.04 as well.

The star has just undergone a new outburst and is starting to decline again.

The HOYS project reached another recent milestone of 60,00 images in the database. Unfortunately this means the database is now very slow to extract data for lightcurves for. Needs some funding for a developer to work on the database indexing.

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Type II supernova 2022ewj in NGC 3367

23 March 2022|News, Supernova|

2022ewj (= ATLAS22jhw), TNS discovered 2022/03/19.544 by Koichi Itagaki
Found in NGC 3367 at R.A. = 10h46m34s.630, Decl. = +13°45’16”.98
Galaxy is about mag. 12, supernova about mag. 16.3 R  using photometry with ASTAP.

Object IDSupernova 2021ewj
Details2022-03-22 22:31 – 22:42 UT
Hazy skies
Telescope250mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)5 x 180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop, ASTAP
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M100 (NGC 4321

21 March 2022|Galaxy, M91+, News|

A grand design spiral galaxy in Coma Berenices, 55 million light years away and part of the Virgo cluster.
V and R filters used

Object IDM100, NGC 4321
Coma Berenices
7.4′ x 6.3′
Mag. 9.5
Details2022-03-20
Telescope240mm f4.8 Newtonian
R, V filters
CameraAtik 460EX @-10 °C
Exposure(s)20 x 180s V
20 x 180s R
d,f,b
CaptureNINA
ProcessingAPP, Photoshop
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2MASS J17554042+6551277 first star imaged by JWST

17 March 2022|News, Other|

The first star imaged by JWST after alignment and focusing complete

Object ID2MASS J17554042+6551277
Details2022-03-16 23:30 – 22:43 UT
Telescope240mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)5 x 180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

And here’s the actual image
Credits: NASA/STScI

SN 2021agpf in NGC 5732

17 March 2022|News, Supernova|

2021agpf (= ATLAS21bnoc), TNS discovered 2021/12/26.624 by ATLAS
Found in NGC 5732 at R.A. = 14h40m37s.708, Decl. = +38°37’56”.31
Galaxy is about mag. 14, supernova about mag. 17.3 using photometry with ASTAP.

Object IDSupernova 2021agpf
Details2022-03-16 22:19 – 22:47 UT
Strong moonlight
Telescope240mm f4.8 Newtonian
R filter
CameraAtik 460EX @-10 °C
Exposure(s)10 x 180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop, ASTAP
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New meteor camera first detections

14 March 2022|Meteorcam, Meteors, News|

As part of the Global Meteor Network I have added a new camera on the edge of Edinburgh, built following the GMN wiki instructions. Scotland doesn’t seem to have many and definitely needs more.

Still in the early config stages but this is the first detection saved as an animated GIF. I don’t plan on posting these here all the time but these are the first!

My azimuth seems to be about 120° which is what I was aiming for.

2022-03-13 02:22:58 UT
2022-03-15 02:06:15 UT

My IstraStream is here.

And from the second night, much better:

Detected meteors 2022-03-15 UK006E

This is my detection coverage.
Calibrated azimuth: 120.5°, altitude 49.5°

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145 Adeona asteroid light curve

3 March 2022|Asteroid, News|

Third submission to GOSA project. This was marked as a “Important target” with just 25% completed.

Object ID145 Adeona
Details2022-03-01 20:06:31 to 2022-03-01 22:55:22
Telescope250mm f4.8 Newtonian
V filter
CameraAtik 460EX @-10°C
Exposure(s)56 x 180s
darks, flats, bias
CaptureNINA
ProcessingGOSA
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22 Kalliope asteroid light curve

1 March 2022|Asteroid, News|

Second submission to GOSA project. This was marked as a “Hot target”. There was a close almost-grazing-occultation with the fainter star nearby. Looked like it was going to be very close but I suspect missed in the end.

Object ID22 Kalliope
Details2022-02-28 20:11:12 to 2022-02-28 23:58:17
Telescope250mm f4.8 Newtonian
V filter
CameraAtik 460EX @-10°C
Exposure(s)290 x 45s
darks, flats, bias
CaptureNINA
ProcessingGOSA
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19P/Borrelly

28 February 2022|Comets, News|

Currently the brightest comet around at about mag. 9. Photometry with ASTAP gives me a V magnitude of 9.7. Animation shows it heading away from the Sun now, after perihelion (1 Feb 2022), tail first.

Object IDComet 19P Borrelly
Details2022-02-26 21:02:22 – 21:42:46
Telescope250mm f4.8 Newtonian
V filter
CameraAtik 460EX @-10°C
Exposure(s)20 x 120s
darks, flats, bias
CaptureNINA
ProcessingASTAP, Photoshop
19P Borrelly Animation
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68 Leto asteroid light curve

28 February 2022|Asteroid, News|

First submission to GOSA project – Gaia-Groundbased Observational Service for Asteroids (Gaia-GOSA)

Object ID68 Leto
Details2022-02-26 22:01:29  to 2022-02-27 00:47:26
Telescope250mm f4.8 Newtonian
V filter
CameraAtik 460EX @-10°C
Exposure(s)147 x 60s
darks, flats, bias
CaptureNINA
ProcessingGOSA
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(201) Penelope light curve

11 February 2022|Asteroid, News, Other|

A large main belt asteroid, discovered by Austrian astronomer Johann Palisa in 1879. Thought I’d try the same technique as for an eclipsing binary. One extra step in AstroImageJ to track the asteroid between frames. Didn’t get enough data to determine a period and comparison stars were impossible to find in this particular field so relative flux only.

Object ID(201) Penelope
Details2022-02-10
21:39:08 – 00:59:05 UT
Telescope250mm f4.8 Newtonian
CameraAtik 460EX @-10°C
V filter
Exposure(s)95 x 120s
darks, flats, bias
CaptureNINA
ProcessingAstroImageJ
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