https://skyhound.com/forums/ Sat, 09 May 2026 20:28:26 +0000 MyBB https://skyhound.com/forums/showthread.php?tid=2933 Fri, 20 Oct 2023 23:22:54 -0400 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2933  
Celestron C9.25 Edge HD F10 at prime focus (2350mm).
ASI2600MM Pro (Bin 2x2) for the outer, fainter moons. 60 sec exposures, Gain=0, Offset=15. (The Sky X Pro Camera Add On).
Player One Saturn SQR (Bin 1x1) for the 4 Galilean satellites and Amalthea. (SharpCap).
Bortle 7 skies.
 
I used SkyTools Imaging 4 (ST4) to locate and GoTo all the satellites, other than Leda, whose data I obtained from the JPL Horizons website. ST4 provided the following information for my location in Brisbane, set for the mid-time of my session.
 
Name                  Mag      PA°        Sep"
Io                         4.8         247.4    95.1
Europa                5.1         75.8       156.8
Ganymede         4.4         226.8    53.6
Callisto                5.4         281.0    72.3
Amalthea           13.9       230.8    9.5
Himalia               14.6       223.6    3538.0
Elara                    16.6       98.7       1682.8
Pasiphae            16.8       277.4    12164.8
Sinope                18.1       273.4    2576.9
Lysithea              18.2       168.9    1982.4
Carme                 17.8       236.3    8051.9
Ananke               18.7       76.2       7649.4
 
Sinope was the most affected by the spill over of unwanted glare from the Jovian disc, so I had to place it towards the edge to lessen the impact. The whole project was made so easy through being able to obtain all the bodies data (apart from Leda) in ST4 and use ST4 to slew to each body in turn. I grabbed between 10 and 15 frames of 60 secs each which easily recorded these brighter satellites.
 
The positional data for Leda was obtained from the JPL Horizons website and I slewed to the RA and DEC coordinates to locate it. I grabbed 56x60 sec frames for the much fainter Leda. The recorded position is a good candidate when compared to the JPL position but to be certain, I would probably have to image it again to see if it has moved.
 
2023-Oct-20 15:00UT.
RA=02 38 05.41 DEC=+13 51 51.0.
Magnitude 20.068.
01 27 25 AEST
 
******** ASTROMETRIC SOLUTION RESULTS ********
Scale: 0.6460 arcseconds/pixel
Size (pixels): 3124 x 2088
Angular Size: 0° 33' 38" x 0° 22' 29"
Position Angle: 0° 49' from north through east
Mirror Image: No
RMS: 0.68 (X: 0.56 Y: 0.38)
Number of Stars Used in Solution: 102 (100%)
FWHM: 3.29 pixels, 2.13 arcseconds
**********************************************
 
I used Player One Saturn SQR (Bin 1x1) for the Jovian disc and Amalthea, with the 4 Galilean satellites of Europa, Callisto, Io and Ganymede as it had a higher framerate of 42 fps.
 
The 4-panel frames are full res crops where I have overlaid the text from ST4 over the BYW image, as a colour Layer in PS CC, to identify the satellites.
 
Dennis


  Jupiters Moons Panel 01 Crop 1600.jpg (Size: 317.55 KB / Downloads: 8)


  Jupiters Moons Panel 02 Crop 1600.jpg (Size: 304.1 KB / Downloads: 5)


  Galillean and Amalthea Crop 1600.jpg (Size: 66.38 KB / Downloads: 6)


  Amalthea Raw Frame.jpg (Size: 103.24 KB / Downloads: 6)

---

Here are a few screen shots of SkyTools 4 Imaging that proved invaluable in tracking down these faint objects and determing the West Elongation of Amalthea.

Dennis


  SkyTools 4 Imaging.jpg (Size: 172.59 KB / Downloads: 2)


  SkyTools 4 Imaging Inner Moons Ctop 1600.jpg (Size: 25.9 KB / Downloads: 7)

I have zoomed in for this scree capture, so some of the outer satellites lie outside the field of view.

  SkyTools 4 Imaging Outer Moons Ctop 1600.jpg (Size: 51.65 KB / Downloads: 7) ]]>  
Celestron C9.25 Edge HD F10 at prime focus (2350mm).
ASI2600MM Pro (Bin 2x2) for the outer, fainter moons. 60 sec exposures, Gain=0, Offset=15. (The Sky X Pro Camera Add On).
Player One Saturn SQR (Bin 1x1) for the 4 Galilean satellites and Amalthea. (SharpCap).
Bortle 7 skies.
 
I used SkyTools Imaging 4 (ST4) to locate and GoTo all the satellites, other than Leda, whose data I obtained from the JPL Horizons website. ST4 provided the following information for my location in Brisbane, set for the mid-time of my session.
 
Name                  Mag      PA°        Sep"
Io                         4.8         247.4    95.1
Europa                5.1         75.8       156.8
Ganymede         4.4         226.8    53.6
Callisto                5.4         281.0    72.3
Amalthea           13.9       230.8    9.5
Himalia               14.6       223.6    3538.0
Elara                    16.6       98.7       1682.8
Pasiphae            16.8       277.4    12164.8
Sinope                18.1       273.4    2576.9
Lysithea              18.2       168.9    1982.4
Carme                 17.8       236.3    8051.9
Ananke               18.7       76.2       7649.4
 
Sinope was the most affected by the spill over of unwanted glare from the Jovian disc, so I had to place it towards the edge to lessen the impact. The whole project was made so easy through being able to obtain all the bodies data (apart from Leda) in ST4 and use ST4 to slew to each body in turn. I grabbed between 10 and 15 frames of 60 secs each which easily recorded these brighter satellites.
 
The positional data for Leda was obtained from the JPL Horizons website and I slewed to the RA and DEC coordinates to locate it. I grabbed 56x60 sec frames for the much fainter Leda. The recorded position is a good candidate when compared to the JPL position but to be certain, I would probably have to image it again to see if it has moved.
 
2023-Oct-20 15:00UT.
RA=02 38 05.41 DEC=+13 51 51.0.
Magnitude 20.068.
01 27 25 AEST
 
******** ASTROMETRIC SOLUTION RESULTS ********
Scale: 0.6460 arcseconds/pixel
Size (pixels): 3124 x 2088
Angular Size: 0° 33' 38" x 0° 22' 29"
Position Angle: 0° 49' from north through east
Mirror Image: No
RMS: 0.68 (X: 0.56 Y: 0.38)
Number of Stars Used in Solution: 102 (100%)
FWHM: 3.29 pixels, 2.13 arcseconds
**********************************************
 
I used Player One Saturn SQR (Bin 1x1) for the Jovian disc and Amalthea, with the 4 Galilean satellites of Europa, Callisto, Io and Ganymede as it had a higher framerate of 42 fps.
 
The 4-panel frames are full res crops where I have overlaid the text from ST4 over the BYW image, as a colour Layer in PS CC, to identify the satellites.
 
Dennis


  Jupiters Moons Panel 01 Crop 1600.jpg (Size: 317.55 KB / Downloads: 8)


  Jupiters Moons Panel 02 Crop 1600.jpg (Size: 304.1 KB / Downloads: 5)


  Galillean and Amalthea Crop 1600.jpg (Size: 66.38 KB / Downloads: 6)


  Amalthea Raw Frame.jpg (Size: 103.24 KB / Downloads: 6)

---

Here are a few screen shots of SkyTools 4 Imaging that proved invaluable in tracking down these faint objects and determing the West Elongation of Amalthea.

Dennis


  SkyTools 4 Imaging.jpg (Size: 172.59 KB / Downloads: 2)


  SkyTools 4 Imaging Inner Moons Ctop 1600.jpg (Size: 25.9 KB / Downloads: 7)

I have zoomed in for this scree capture, so some of the outer satellites lie outside the field of view.

  SkyTools 4 Imaging Outer Moons Ctop 1600.jpg (Size: 51.65 KB / Downloads: 7) ]]> https://skyhound.com/forums/showthread.php?tid=2922 Mon, 02 Oct 2023 18:33:38 -0400 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2922  
To cater for the varying brightness levels, I grabbed a series of test exposures ranging from 01 sec to 30 secs and used the following data sets to generate the final composite image using Layers In PS CC to blend the 3 sets of images together.
 
05 secs x 30 frames 11:00pm to 11:04pm AEST (UT+10).
15 secs x 30 frames 11:11pm to 11:20pm AEST(UT+10).
02 secs x21 frames 11:28pm to 11:30pm AEST(UT+10).
 
SkyTools 4 Imaging provides the following details for 11:15pm AEST (UT+10).
 
Saturn at Magnitude: 0.54
 
Satellites:
Name      Mag   PA°    Sep"
Mimas     13.0 271.9   27.5
Enceladus 11.8 100.6   33.4
Tethys    10.3 275.0   44.6
Dione     10.5  91.5   53.2
Rhea       9.8 269.6   69.4
Titan      8.4 118.5   79.0
Hyperion  14.3 287.0  128.9
Iapetus   11.2 100.9   65.1
Phoebe    16.6 240.1  600.3
 
The image of the inner moons is a full res crop and the wider view has been resampled down to fit in Phoebe, some way away from the planet. The image of Saturn was taken with my ASI662MC and blended in over the blown out Saturn.
 
SkyTools 4 Imaging proved very useful as I could monitor the changing positions of Enceladus and Mimas in real time, as Enceladus was being increasingly swamped as it entered Saturn’s glare on the E and Mimas began to emerge from the planetary glare on the W.
 
Dennis

Full res crop of inner moons

  Saturn 02 05 15 secs layers FR Crop 1600.jpg (Size: 187.6 KB / Downloads: 12)

Down sampled wider view to include Phoebe

  Saturn 9 Moons Crop 1600.jpg (Size: 150.77 KB / Downloads: 8)

And this is what gave me certainty that I had succeeded.

  ST4 Screen Capture.jpg (Size: 98.63 KB / Downloads: 12) ]]>  
To cater for the varying brightness levels, I grabbed a series of test exposures ranging from 01 sec to 30 secs and used the following data sets to generate the final composite image using Layers In PS CC to blend the 3 sets of images together.
 
05 secs x 30 frames 11:00pm to 11:04pm AEST (UT+10).
15 secs x 30 frames 11:11pm to 11:20pm AEST(UT+10).
02 secs x21 frames 11:28pm to 11:30pm AEST(UT+10).
 
SkyTools 4 Imaging provides the following details for 11:15pm AEST (UT+10).
 
Saturn at Magnitude: 0.54
 
Satellites:
Name      Mag   PA°    Sep"
Mimas     13.0 271.9   27.5
Enceladus 11.8 100.6   33.4
Tethys    10.3 275.0   44.6
Dione     10.5  91.5   53.2
Rhea       9.8 269.6   69.4
Titan      8.4 118.5   79.0
Hyperion  14.3 287.0  128.9
Iapetus   11.2 100.9   65.1
Phoebe    16.6 240.1  600.3
 
The image of the inner moons is a full res crop and the wider view has been resampled down to fit in Phoebe, some way away from the planet. The image of Saturn was taken with my ASI662MC and blended in over the blown out Saturn.
 
SkyTools 4 Imaging proved very useful as I could monitor the changing positions of Enceladus and Mimas in real time, as Enceladus was being increasingly swamped as it entered Saturn’s glare on the E and Mimas began to emerge from the planetary glare on the W.
 
Dennis

Full res crop of inner moons

  Saturn 02 05 15 secs layers FR Crop 1600.jpg (Size: 187.6 KB / Downloads: 12)

Down sampled wider view to include Phoebe

  Saturn 9 Moons Crop 1600.jpg (Size: 150.77 KB / Downloads: 8)

And this is what gave me certainty that I had succeeded.

  ST4 Screen Capture.jpg (Size: 98.63 KB / Downloads: 12) ]]> https://skyhound.com/forums/showthread.php?tid=2909 Mon, 14 Aug 2023 22:50:36 -0400 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2909
The ephemeris from JPL Horizons indicated that the JWST would be high up in the skies, located in the constellation of Sagittarius. Even better, outside, the skies were clear.

I managed to collect 5 sets of image runs, whilst dodging some intermittent thin, wispy clouds.

• Run 02 - 60 frames 8:07PM to 9:08PM AEST (UT+10)
  
• Run 03 - 57 frames 9:15PM to 10:13PM AEST (UT+10)
  
• Run 04 - 48 frames 10:223PM to 11:11PM AEST (UT+10)
  
• Run 05 - 60 frames 11:13PM to 00:14AM AEST (UT+10)
  
• Run 06 - 60 frames 00:26AM to 01:27AM AEST (UT+10)
  

Each Run was processed separately in PixInsight, with the 5 output files then Aligned and Combined into a final composite image revealing the curved trail of the JWST.

Imaging start time - 2023-08-14 10:06:36 UTC (Run 02)
Imaging end time - 2023-08-14 15:27:46 UTC (Run 06)
 
Raw Image details.

• Tak Mewlon 210 F11.5
  
• Tak x0.8 Reducer/Flattener
  
• QHY268M Camera
  
• Scale: 0.726 arcseconds/pixel
  
• 2137mm F10.2
  
• 14th – 15th August 2023
  
• Brisbane, QLD
  

 
Cheers

Dennis


  JWST 14 Aug Run 02 throught 06 Combined DBE Noise XT Crop 2048.jpg (Size: 684.66 KB / Downloads: 9) ]]>
The ephemeris from JPL Horizons indicated that the JWST would be high up in the skies, located in the constellation of Sagittarius. Even better, outside, the skies were clear.

I managed to collect 5 sets of image runs, whilst dodging some intermittent thin, wispy clouds.

• Run 02 - 60 frames 8:07PM to 9:08PM AEST (UT+10)
  
• Run 03 - 57 frames 9:15PM to 10:13PM AEST (UT+10)
  
• Run 04 - 48 frames 10:223PM to 11:11PM AEST (UT+10)
  
• Run 05 - 60 frames 11:13PM to 00:14AM AEST (UT+10)
  
• Run 06 - 60 frames 00:26AM to 01:27AM AEST (UT+10)
  

Each Run was processed separately in PixInsight, with the 5 output files then Aligned and Combined into a final composite image revealing the curved trail of the JWST.

Imaging start time - 2023-08-14 10:06:36 UTC (Run 02)
Imaging end time - 2023-08-14 15:27:46 UTC (Run 06)
 
Raw Image details.

• Tak Mewlon 210 F11.5
  
• Tak x0.8 Reducer/Flattener
  
• QHY268M Camera
  
• Scale: 0.726 arcseconds/pixel
  
• 2137mm F10.2
  
• 14th – 15th August 2023
  
• Brisbane, QLD
  

 
Cheers

Dennis


  JWST 14 Aug Run 02 throught 06 Combined DBE Noise XT Crop 2048.jpg (Size: 684.66 KB / Downloads: 9) ]]> https://skyhound.com/forums/showthread.php?tid=2896 Tue, 25 Jul 2023 19:40:45 -0400 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2896

Right at the top of the UKS 1 60x60 sec Lum Frames, I discovered a short trail, and the subsequent investigation revealed it to be a Main-belt Asteroid, 9788 Yagami, at mag 18.4, my faintest asteroid to date located between the orbits of Mars and Jupiter.

The Asteroid’s relatively slow motion allowed it to register on the sensor.

Tak Mewlon 210 F11.5, Reducer x0.8, ASI294MM Camera, 60x60 sec Lum Filter.

9788 Yagami was discovered by Takao Kobayashi, a Japanese amateur astronomer and an outstanding discoverer of minor planets who currently works at the Ōizumi Observatory. The asteroid 3500 Kobayashi is named after him.

Kobayashi has discovered more than 2000 asteroids using CCD technology, including the Amor asteroids 7358 Oze, (23714) 1998 EC3, (48603) 1995 BC2 and about nine Trojan asteroids. He also discovered the periodic comet P/1997 B1 (Kobayashi), which he originally reported as an asteroid.

Ōizumi Observatory (obs. code: 411) is a private astronomical observatory in Ōizumi, Gunma Prefecture, Japan. Takao Kobayashi has made discoveries of numerous minor planets at the observatory. Since its founding, Kobayashi has discovered 1,200 minor asteroids and their positions using a 10-inch (250 mm) telescope.

https://minorplanetcenter.net/db_search/...ct_id=9788

https://ssd.jpl.nasa.gov/tools/sbdb_look...?sstr=9788

Cheers

Dennis


  UKS_1_LUM_Annotated Asteroid 9788 Yagami Crop 1600.jpg (Size: 435.02 KB / Downloads: 5)


  UKS_1_LUM_BlurXT_Asteroid 9788 Yagami Crop 1600.jpg (Size: 318.89 KB / Downloads: 4) ]]>

Right at the top of the UKS 1 60x60 sec Lum Frames, I discovered a short trail, and the subsequent investigation revealed it to be a Main-belt Asteroid, 9788 Yagami, at mag 18.4, my faintest asteroid to date located between the orbits of Mars and Jupiter.

The Asteroid’s relatively slow motion allowed it to register on the sensor.

Tak Mewlon 210 F11.5, Reducer x0.8, ASI294MM Camera, 60x60 sec Lum Filter.

9788 Yagami was discovered by Takao Kobayashi, a Japanese amateur astronomer and an outstanding discoverer of minor planets who currently works at the Ōizumi Observatory. The asteroid 3500 Kobayashi is named after him.

Kobayashi has discovered more than 2000 asteroids using CCD technology, including the Amor asteroids 7358 Oze, (23714) 1998 EC3, (48603) 1995 BC2 and about nine Trojan asteroids. He also discovered the periodic comet P/1997 B1 (Kobayashi), which he originally reported as an asteroid.

Ōizumi Observatory (obs. code: 411) is a private astronomical observatory in Ōizumi, Gunma Prefecture, Japan. Takao Kobayashi has made discoveries of numerous minor planets at the observatory. Since its founding, Kobayashi has discovered 1,200 minor asteroids and their positions using a 10-inch (250 mm) telescope.

https://minorplanetcenter.net/db_search/...ct_id=9788

https://ssd.jpl.nasa.gov/tools/sbdb_look...?sstr=9788

Cheers

Dennis


  UKS_1_LUM_Annotated Asteroid 9788 Yagami Crop 1600.jpg (Size: 435.02 KB / Downloads: 5)


  UKS_1_LUM_BlurXT_Asteroid 9788 Yagami Crop 1600.jpg (Size: 318.89 KB / Downloads: 4) ]]> https://skyhound.com/forums/showthread.php?tid=2816 Sat, 15 Apr 2023 21:21:53 -0400 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2816

The Jupiter Icy moons Explorer ("JUICE") is an ESA mission launched on 14th April 2023 from French Guiana (ELA-3) on an Ariane 5. Its period and area of operations will overlap with NASA's Europa Clipper mission launching in 2024.

The next evening, 15th April, I used the JPL Horizons System to generate an ephemeris for my location and observing period, including the RA and DEC coordinates for both J2000 and Apparent data.

I plugged the J2000 coordinates into the “Object Requestor” “Enter Coordinate” Dialog in ST4 Imaging, which centred me in the predicted field.

After a GoTo and a couple of test exposures I was astonished to find two objects moving along the same trajectory? The “main” object I assume was JUICE and the other trail must have been the rocket booster? These are the 2 horizontal trails, the diagonal trail at bottom left zipped through the field early on in the series.

I managed to record 60x60 sec exposures (some cloud interrupted) and to make things a little more interesting, we had a power outage part way through the evening and I had to re-boot everything and start over.

Tak Mewlon 210 F11.5
Tak x0.8 Reducer
FL=2100mm at F10.3.
QHY268M Camera.

15th April 2023, 9:13PM to 10:14PM AEST
UTC: 2023-04-15T11:13 to 12:14.
Brisbane.

Cheers

Dennis


  Juice_60_sec_frames_Annotated Crop 1600 No Overlay Inverted.jpg (Size: 192.56 KB / Downloads: 13)


  Juice_60_sec_frames_Annotated-Crop-1600.jpg (Size: 259.75 KB / Downloads: 10) ]]>

The Jupiter Icy moons Explorer ("JUICE") is an ESA mission launched on 14th April 2023 from French Guiana (ELA-3) on an Ariane 5. Its period and area of operations will overlap with NASA's Europa Clipper mission launching in 2024.

The next evening, 15th April, I used the JPL Horizons System to generate an ephemeris for my location and observing period, including the RA and DEC coordinates for both J2000 and Apparent data.

I plugged the J2000 coordinates into the “Object Requestor” “Enter Coordinate” Dialog in ST4 Imaging, which centred me in the predicted field.

After a GoTo and a couple of test exposures I was astonished to find two objects moving along the same trajectory? The “main” object I assume was JUICE and the other trail must have been the rocket booster? These are the 2 horizontal trails, the diagonal trail at bottom left zipped through the field early on in the series.

I managed to record 60x60 sec exposures (some cloud interrupted) and to make things a little more interesting, we had a power outage part way through the evening and I had to re-boot everything and start over.

Tak Mewlon 210 F11.5
Tak x0.8 Reducer
FL=2100mm at F10.3.
QHY268M Camera.

15th April 2023, 9:13PM to 10:14PM AEST
UTC: 2023-04-15T11:13 to 12:14.
Brisbane.

Cheers

Dennis


  Juice_60_sec_frames_Annotated Crop 1600 No Overlay Inverted.jpg (Size: 192.56 KB / Downloads: 13)


  Juice_60_sec_frames_Annotated-Crop-1600.jpg (Size: 259.75 KB / Downloads: 10) ]]> https://skyhound.com/forums/showthread.php?tid=2446 Sun, 13 Feb 2022 04:10:18 -0500 Dennis]]> https://skyhound.com/forums/showthread.php?tid=2446  
https://ssd.jpl.nasa.gov/horizons/app.html#/
 
"The James Webb Space Telescope is located some 1.5 million kilometres (1 million miles) away from the Earth at what is called the second Lagrange point or L2. What is special about this orbit is that it lets the telescope stay in line with the Earth as it moves around the Sun. This allows the satellite's large sunshield to protect the telescope from the light and heat of the Sun and Earth (and Moon)."
 
I grabbed a series of images (with some cloud interruptions) on Wed 9th Feb 2022, between 9:04pm and 9:35pm AEST, (2022-02-09T11:04 to 11:35 UT), Brisbane, QLD, Australia.
 
I used a Celestron C9.25 Edge HD with the Celestron x0.7 Reducer (1645mm fl) and the QHY268M camera. Each frame was exposed for 120 secs. I understand that it is approx. magnitude 17.9.
 
After processing the image set, I saw a trail that looked too good to be true and sure enough, it was. The obvious trail belonged to an Asteroid, Number 15520, aka 1999 XK98.
 
Oh well, back to the drawing board. I loaded the individual calibrated and aligned frames into PixInsight and used the Blink Process and sure enough, I could just make out a small clump of pixels marching across the screen in the predicted positions of the JWST as the frames advanced. Each clump was barely above the background level but became obvious when blinked.
 
I loaded the frames into PS CC and used Layer Masks to combine the trail of the LWST and also raise the brightness level of the trail, above the background, to make it more conspicuous.
 
Image details (cropped from full frame):
Center (RA, hms): 07h 28m 41.669s
Center (Dec, dms): +10° 30' 09.775"
Size: 9.84 x 7.38 arcmin
Pixel scale: 0.461 arcsec/pixel
Orientation: Up is 360 degrees E of N
2022-02-09T11:04 to 11:42 UT. (9:04pm to 9:42pm AEST)
Each frame exposed for 120 seconds.
 
Asteroid details:
Object Name: 15520 1999 XK98
Object Type: Asteroid
Magnitude: 16.85
 
Bands of clouds rolled in during the session so there are a few gaps in the trail.
 
Cheers
 
Dennis


  JWST 9Feb2022 Crop 1280 Text.jpg (Size: 183.65 KB / Downloads: 21)


  JWST_120.000secs_01and13 Crop 1280sd.jpg (Size: 413.45 KB / Downloads: 15) ]]>  
https://ssd.jpl.nasa.gov/horizons/app.html#/
 
"The James Webb Space Telescope is located some 1.5 million kilometres (1 million miles) away from the Earth at what is called the second Lagrange point or L2. What is special about this orbit is that it lets the telescope stay in line with the Earth as it moves around the Sun. This allows the satellite's large sunshield to protect the telescope from the light and heat of the Sun and Earth (and Moon)."
 
I grabbed a series of images (with some cloud interruptions) on Wed 9th Feb 2022, between 9:04pm and 9:35pm AEST, (2022-02-09T11:04 to 11:35 UT), Brisbane, QLD, Australia.
 
I used a Celestron C9.25 Edge HD with the Celestron x0.7 Reducer (1645mm fl) and the QHY268M camera. Each frame was exposed for 120 secs. I understand that it is approx. magnitude 17.9.
 
After processing the image set, I saw a trail that looked too good to be true and sure enough, it was. The obvious trail belonged to an Asteroid, Number 15520, aka 1999 XK98.
 
Oh well, back to the drawing board. I loaded the individual calibrated and aligned frames into PixInsight and used the Blink Process and sure enough, I could just make out a small clump of pixels marching across the screen in the predicted positions of the JWST as the frames advanced. Each clump was barely above the background level but became obvious when blinked.
 
I loaded the frames into PS CC and used Layer Masks to combine the trail of the LWST and also raise the brightness level of the trail, above the background, to make it more conspicuous.
 
Image details (cropped from full frame):
Center (RA, hms): 07h 28m 41.669s
Center (Dec, dms): +10° 30' 09.775"
Size: 9.84 x 7.38 arcmin
Pixel scale: 0.461 arcsec/pixel
Orientation: Up is 360 degrees E of N
2022-02-09T11:04 to 11:42 UT. (9:04pm to 9:42pm AEST)
Each frame exposed for 120 seconds.
 
Asteroid details:
Object Name: 15520 1999 XK98
Object Type: Asteroid
Magnitude: 16.85
 
Bands of clouds rolled in during the session so there are a few gaps in the trail.
 
Cheers
 
Dennis


  JWST 9Feb2022 Crop 1280 Text.jpg (Size: 183.65 KB / Downloads: 21)


  JWST_120.000secs_01and13 Crop 1280sd.jpg (Size: 413.45 KB / Downloads: 15) ]]> https://skyhound.com/forums/showthread.php?tid=11 Tue, 14 Nov 2017 17:04:22 -0500 Jhroof]]> https://skyhound.com/forums/showthread.php?tid=11  My current interest is tracking down Near Earth Objects.  The past couple of nights I have been following 444584 (2006 UK).  At around 15th mag it is about at the limit I can do from light polluted Orlando Fl. Anybody else interested in NEOs?

Also Greg, I sure would like a copy of Skytools 4 beta.  I have a licensed  copy of Skytools 3 Pro and use it all the time.]]>  My current interest is tracking down Near Earth Objects.  The past couple of nights I have been following 444584 (2006 UK).  At around 15th mag it is about at the limit I can do from light polluted Orlando Fl. Anybody else interested in NEOs?

Also Greg, I sure would like a copy of Skytools 4 beta.  I have a licensed  copy of Skytools 3 Pro and use it all the time.]]>