Comets

Comets2020-10-15T15:25:52+00:00

29P 2024-03-29

31 March 2024|Comet, News|

Down to 15.7 R now. Diffuse non-circular coma.

OBSERVER: Mark Phillips
CONTACT: Forthimage Observatory
TELESCOPE: 0.25m f4.8 Newtonian
EXPOSURE JD: Mid-exposure, not corrected for light time
—————————————————————
JD mag Flt SNR ZeroPt Cat Design.
—————————————————————
2460399.47826 15.742 R R 12.13 24.430 UCAC4 0029P
—– end —–

Object IDComet 29P
Details2024-03-29 23:19 – 23:31 UT
Telescope250mm f4.8 Newtonian, MPCC
CameraAA IMX571 mono
FiltersRc
Exposure(s)12x60s 2×2 60% ROI
CaptureNINA
ProcessingASTAP, Astrometrica

29P Outburst discovery 2024-03-24

25 March 2024|ASERO, Comet, News|

Discovered using the ASERO/Murrell. I was taking 5x60s stacks and using Astrometrica to measure and quickly noticed that 29P was getting much easier to see with a better SNR. Had originally planned to take several such sets separated by 1 hour but events overtook this plan.

4 sets of 5x60s stacks
—————————————————————
JD mag Flt SNR ZeroPt Cat Design.
—————————————————————
2460394.34874 16.590 R V 37.01 26.284 UCAC4 0029P
2460394.35224 16.314 R V 52.65 26.259 UCAC4 0029P
2460394.37911 14.724 R V 157.05 26.260 UCAC4 0029P
2460394.38261 14.629 R V 166.58 26.303 UCAC4 0029P
—– end —–

So I put a post on the BAA comet group asking for help confirming and emailed Richard Miles to alert him. He asked that I start continuously imaging 29P and measure individual frames as we seemed to be the only ones with clear skies. Many more subs were taken to confirm the comet had increased in brightness from about 16.7R to about 13.7R, a significant outburst. Later on as as we lost the sky to clouds, telescopes in Chile and other parts of the world were able to take over.

Richard requested the first 5 FITS files to determine that the outburst started on the 3rd sub we took. I also sent the remaining subs and Astrometrica files and he produced a preliminary plot using a 3px radius aperture:

All the data are now on the BAA 29P project page.

Alert on the comet group:

ALERT: Strong outburst of 29P/S-W1 discovered by Mark Phillips of the Astro Soc. of Edinburgh (ASE), Scotland
Richard Miles Mar 24 #298
Mark Phillips has only recently joined the MISSION 29P initiative using the ASE’s 0.3-m remote telescope in Spain and has struck very lucky with this discovery of a 13th magnitude outburst of 29P/Schwassmann-Wachmann 1..

This is a particularly important discovery as I expect there to be one or two further strong outbursts during the next 5 days.

The reason is that this event comes 107 days after an earlier very strong outburst, which itself happened 114 days after a previous strong outburst in early August detected by Jean-Francois Soulier.

The time interval corresponds with almost exactly two rotations of the nucleus indicative of a highly-active region on a small fraction of the nucleus surface.

Importantly both these earlier events were followed by at least one further strong eruption within the next 5 days of the first.

We may also see a further step-change in brightness within the next 24 hours as happened in early December.

Well done, Mark!

Further monitoring is much encouraged.

Richard Miles
BAA

On SpaceWeather.com

12P Outburst

6 March 2024|Comet, News|

So I detected the next 12P outburst, which was then confirmed by Denis Buczinski and Nick James. Also added to Nick’s 12P chart

Object ID12P/Pons-Brooks
Details2024-02-29 19:37 UT
Mag 9.8 in 9″
Telescope250mm f4.8 Newtonian
MPCC
CameraAltair IMX571 mono
FiltersV
Exposure(s)10 x 30s 2×2
CaptureNINA
ProcessingAstrometrica, Photoshop

BAA 12P chart by Nick James

MP data now added in

12P/Pons-Brooks 2023-12-02 ASERO

3 December 2023|ASERO, Comet, News|

Interesting structure and outbursts. Imaged from the Astronomical Society of Edinburgh’s remote telescope in Trevinca, Spain.

Object ID12P/Pons-Brooks
Details2023-12-02 18:56 – 19:02 UT
mag. 8.85, coma 7.3′
tail 10′, PA 34°
TelescopeAskar 94 mm f/4.4 Triplet Apo
JTW Trident P75 mount
CameraToupTek Colour IMX571
FiltersOptolong L
Exposure(s)11 x 30s exposures
CaptureNINA
ProcessingProcessed in APP and PS

12P/Pons-Brooks 2023-11-19 ASERO

21 November 2023|ASERO, Comet, News|

Interesting structure and outbursts. Imaged from the Astronomical Society of Edinburgh’s remote telescope in Trevinca, Spain. Extreme stretch to show the kink in the developing tail.

Object ID12P/Pons-Brooks
Details2023-11-19 18:46 – 19:10 UT
mag. 9.0, coma 4.7′
tail 18′, PA 44°
TelescopeSharpstar 94 mm f/4.4 Triplet Apo
JTW Trident P75 mount
CameraToupTek Colour IMX571
FiltersOptolong L
Exposure(s)9 x 180s exposures
CaptureNINA
ProcessingProcessed in APP and PS

C/2023 A3 (Tsuchinshan-ATLAS) 2023-05-14

20 May 2023|Comet, News|

Stacked on the comet so the stars trail and the comet remains still. Very faint at a mag of 16.9 CV and coma size < 0.4′

Object IDC/2023 A3 (Tsuchinshan-ATLAS)
Details2023-05-14 23:24 UT
Telescope250mm f4.8 Newtonian
MPCC
CameraQHY168C @-10°C
FiltersIDAS D3
Exposure(s)7x180s
CaptureNINA
ProcessingAPP, ASTAP, Photoshop

C/2023 A3 (Tsuchinshan-ATLAS)

28 April 2023|Comet, News|

The comet “meant” to put on a naked eye show in 2024. Still very far away and faint at about magnitude 17. Stacked on the comet so the stars trail and the comet remains still. Very faint at a mag of about 17 and come size 0.5′

Object IDC/2023 A3 (Tsuchinshan-ATLAS)
Details2023-04-20 22:38 UT
Telescope250mm f4.8 Newtonian
MPCC
CameraATIK 460EX @-10°C
FiltersV
Exposure(s)10x180s
CaptureNINA
ProcessingAPP, ASTAP, Photoshop

C/2022 E3 (ZTF) in R

27 January 2023|Comet, News|

Brighter still. 3 tails including sunward pointing one. Ion tail is twisting having suffered a “discontinuation event” caused by CMEs from the Sun.

Object IDComet C/2022 E3 (ZTF)
Details2023-01-25 23:13 – 22:22 UT
Telescope250mm f4.8 Newtonian
CameraAtik 460EX @-10°C
FiltersR
Exposure(s)20x60s
CaptureNINA
ProcessingAPP, Photoshop

Moving very fast now. 20 minutes, each step 60s.

Comet C/2020 V2 (ZTF)

15 December 2022|Comet, News|

Nicely placed close to the Pole

Object IDComet C/2020 V2 (ZTF)
Details2020-12-14 23:00 – 23:22 UT

  • Coma mag. 10.8
  • Coma diameter 1.5′
  • Tail pa 147°, length 4′
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-10°C
FiltersV
Exposure(s)20 x 60s
CaptureNINA
ProcessingAPP, Photoshop, ASTAP

Using Astrometrica and Comphot gives:
10×10 20×20 30×30 40×40 50×50 60×60
12.49 11.64 11.21 10.92 10.72 10.57 # Counts
12.49 11.70 11.25 10.96 10.74 10.59 # Median annuli
Total integrated magnitude: 10.22 (radius 73.3 arcsec)
COMPHOT: 1.4.6 2022 12 19.811 10.22 2.44 17.45 25.59 23.52 1102.1 0.78 Astrometrica 4.11.1.442 Unknown C-2020-V2-ZTF cometstack.fits