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Another bright Perseid Fireball 2022-08-09

2022-08-09T17:31:09+00:009 August 2022|Meteorcam, Meteors, News|

Almost as bright as the previous one with an absolute mag. of -6.0, but further away so only an apparent mag of -3.6.

Summary for Event
-----------------
Updated: 2022-08-09 08:00:15
shower ID 7 PER (Perseids)
Lg 60.16° Bg 38.63° Vg 59.61km/s
mass 1.34424g, abs. mag -6.0
best visual mag -3.6
Path Details
------------
start -1.77° 55.29° 122.53km
end   -2.15° 55.16° 78.24km
Orbit Details
-------------
Semimajor axis -148.00A.U., 
eccentricity 1.01, inclination 113.04°,
Period nanY, LA Sun 136.19°,
© UK Meteor Observation Network

IC5146 Cocoon Nebula HOYS stack

2022-08-08T10:34:37+00:007 August 2022|HOYS, News|

All the HOYS stacked images from the last few months in R, V and Ha, all stacked into one image and processed just for fun. No science left in it doing it like this, but a nice image anyway. I can find stars down to mag. 19.05 G-band from Gaia data.

Jupiter & Saturn 2022-08-06

2022-08-06T13:40:15+00:006 August 2022|Jupiter, News, Saturn|

First of the season. First of the season. Saturn still low and murky. Jupiter’s extra altitude makes it much easier this year.

Object IDJupiter / Saturn
Details2022-08-06 00:18 UT / 00:012 UT
Telescope250mm f4.8 Newtonian
x2 Barlow
CameraZWO ASI 290MC
FiltersUV/IR block
Exposure(s)90s 80 fps .ser videos
CaptureFireCapture
ProcessingAS3!, Registax 6, Photoshop

2022-08-02 Perseid Fireball

2022-08-03T15:51:18+00:003 August 2022|Meteorcam, Meteors, News|

This is an impressive one that leaves a vapour trail lasting several seconds, mag -6.9. Didn’t register on RMS detections as it was so close and saturated the sensor.

https://archive.ukmeteornetwork.co.uk/reports/2022/orbits/202208/20220802/20220802_232136.430_UK/index.html

Updated manually by Mark McIntyre to include UK006E data.

Summary for Event
-----------------
Updated: 2022-08-03 14:28:43
shower ID 7 PER (Perseids)
Lg 55.19° Bg 38.86° Vg 57.23km/s
mass 2.29762g, abs. mag -6.9
best visual mag -6.8
Path Details
------------
start -1.81° 56.14° 150.44km
end   -2.74° 55.64° 80.08km
Orbit Details
-------------
Semimajor axis 6.09A.U., eccentricity 0.85, 
inclination 110.92°, Period 15.05Y, 
LA Sun 130.34°, last Perihelion 2022-07-08

Bright Perseid 2022-07-31 23:05 UT

2022-08-03T16:59:44+00:001 August 2022|Meteorcam, Meteors, News|

Saw it outside and then found it on the meteor camera. Data from UKMON:

shower ID 7 PER (Perseids)
Lg 50.74° Bg 38.96° Vg 58.81km/s
mass 0.54304g, abs. mag -4.4
best visual mag -2.0
Path Details
------------
start -1.44° 55.83° 123.61km
end   -1.97° 55.55° 85.49km
Orbit Details
-------------
Semimajor axis 16.25A.U., eccentricity 0.94, 
inclination 112.52°, Period 65.48Y, 
LA Sun 128.41°, last Perihelion 2022-07-12
© UK Meteor Observation Network

Comet C/2022 E3 (ZTF)

2022-08-03T16:58:29+00:0027 July 2022|Comet, News|

20 frames and stacked on the comet. V magnitude of 13.6, which is fainter than the Clear values given on COBS, as expected.

Object IDComet C/2022 E3 (ZTF)
Details2022-07-26 23:39 – 00:01 UT
Telescope250mm f4.8 Newtonian
MPCC
CameraAtik 460EX @-10 °C
FiltersPhotometric V
Exposure(s)20 x 60s
CaptureNINA
ProcessingAPP, Photoshop, ASTAP

C-2022 C3 ZTF Orbit

theskylive.com

First Perseid of 2022 detected

2022-07-25T18:23:39+00:0025 July 2022|Meteorcam, Meteors, News|

Pat Devine’s camera UK0074 and mine UK006E detected a very ordinary one, showed by the UKMON data.

Summary for Event
-----------------
Updated: 2022-07-25 06:08:22
shower ID 7 PER (Perseids)
Lg 46.41° Bg 40.26° Vg 55.17km/s
mass 0.01683g, abs. mag 0.4
best visual mag 0.8
Path Details
------------
start -2.70° 55.59° 111.93km
end   -2.87° 55.51° 98.88km
Orbit Details
-------------
Semimajor axis 3.78A.U., eccentricity 0.75, 
inclination 107.74°, Period 7.33Y, 
LA Sun 121.75°, last Perihelion 2022-06-28
© UK Meteor Observation Network

UU Aql Dwarf Nova

2022-08-07T18:03:48+00:0022 July 2022|Cataclysmic Variable, Dwarf Nova, News, Variable Star|

X28087AF chart

Following the AAVSO campaign to observe some Dwarf Novae along with Hubble. The main aim is to determine when the star is faint enough for Hubble to observe it – to avoid damage to its sensors!

Alert Notice 758: Monitoring requested for 11 dwarf novae in support of HST observations in 2021-2022

Has had a recent outburst and my latest two measurements show it as V mag. 16.9 on 2022-07-11 and then on 2022-07-20 a V mag. of 12.3. Quite an outburst. Seems to happen every 2 months.

Photometry using ASTAP, plot from AAVSO VStar.

UPDATE: 2022-07-31 now very faint down at mag. 17 and on its base magnitude.

UU Aql 2022-07-11 Mag. 16.94 +- 0.09 / 2022-07-20 Mag. 12.33 +- 0.01

UU Aql 2022-07-11 / 2022-07-20

Mag. 16.94 +- 0.09 / Mag. 12.33 +- 0.01

Object IDUU Aql
Details2022-07-11 23:49 UT
2022-07-20 23:04 UT
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-10°C
FiltersPhotometric V
Exposure(s)3 x 180s
2 x 180s
d,f,b
CaptureNINA
ProcessingASTAP, VStar

Dwarf Nova illustration

Credit: NASA and L. Hustak (STScI)

Current theory suggests that dwarf novae result from instability in the accretion disk, when gas in the disk reaches a critical temperature that causes a change in viscosity, resulting in a temporary increase in mass flow through the disc, which heats the whole disc and hence increases its luminosity. The mass transfer from the donor star is less than this increased flow through the disc, so the disc will eventually drop back below the critical temperature and revert to a cooler, duller mode. Wikipedia

AR3055 AR3056

2022-07-17T09:36:28+00:0015 July 2022|News, Sun|

Sun is very active at the moment.

Object IDAR3055, AR3056
Details2022-07-15
AR3055 15:47 UT
AR3056 15:51 UT
Telescope250mm f4.8 Newtonian
CameraZWO ASI290MC
FiltersBlack polymer, R
Exposure(s)120s 90fps .SER
CaptureFireCapture
ProcessingAS3!
Registax 6
Photoshop

2022 UK006E monthly reports

2022-07-11T15:20:25+00:002 June 2022|Meteorcam, Meteors, News|

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

V1117 Her

2022-07-22T10:19:37+00:0029 May 2022|News, Variable Star, YSO|

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).”

DO Dra

2022-07-22T11:30:53+00:0012 May 2022|Cataclysmic Variable, Intermediate Polar, 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

AR2993 AR2994

2022-04-25T17:00:46+00:0019 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

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

2022-03-28T18:29:38+00:0028 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

HOYS and 2MASS 21383981+5708470

2022-04-27T09:49:10+00:0025 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.

M100 (NGC 4321

2022-07-25T18:25:17+00:0021 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
Telescope250mm 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

2MASS J17554042+6551277 first star imaged by JWST

2022-03-17T17:19:31+00:0017 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

Type Ia supernova 2022hrs in NGC 4647

2022-06-03T10:48:50+00:0019 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).