12P Pons-Brooks May 3, 2024
I could enjoy imaging of the comet twelve days after the perihelion passage on April 21, 2024.
This frame was composited with many frames.
Here is one shot frame: www.flickr.com/photos/hiroc/53712706316
It was low in the west before the end of twilight, and imaging session was during twilight. Thanks to the location in southern hemisphere and dry atmosphere, imaging was not difficult.
The site was near Paranal Observatory, and there came yellow laser beams from the observatory in the frame as you see. Satellites were nuisance as always.
The comet was drifting toward southeast in Taurus. It was still bright. Dust coma was round and small, though it was saturated on this frame. Dust tail was wide toward northeast. Greenish ion halo was not dominant. Bluish ion tail was long with kinks toward east southeast beyond the edge of the frame. Ion tail looked yellowish with swirls partly, indicating it including sodium ion. It means that the temperature around the area was higher than 3,000K at the date.
"Comet McNaught C/2006 P1: observation of the sodium emission by the solar telescope THEMIS" by Leblanc F et al 2008:
www.aanda.org/articles/aa/pdf/2008/16/aa8795-07.pdf
North is up, and east is to the left on the frame.
Sun Distance: 0.818 AU
Earth Distance: 1.589 AU
equipment: Takahashi FSQ-106ED, 645 Reducer QE 0.72x, EOS 5Dmark3-SP4, modified by Seo-san on ZWO AM5 Mount, autoguided at a star nearby with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding with comet tracking on
Exposure: 15 times x 60 seconds and 2 x 15 seconds at ISO6,400 and f/3.6. It started at 23:27:25 UTC May 3, 2024.
site: 2,430m above sea level at lat. 24 38 55 South and long. 70 16 52 West near Cerro Armazones Chile
SQML was 21.55 at the night. Ambient temperature was around 6 degrees Celsius or 43 degrees Fahrenheit.
12P Pons-Brooks May 3, 2024
I could enjoy imaging of the comet twelve days after the perihelion passage on April 21, 2024.
This frame was composited with many frames.
Here is one shot frame: www.flickr.com/photos/hiroc/53712706316
It was low in the west before the end of twilight, and imaging session was during twilight. Thanks to the location in southern hemisphere and dry atmosphere, imaging was not difficult.
The site was near Paranal Observatory, and there came yellow laser beams from the observatory in the frame as you see. Satellites were nuisance as always.
The comet was drifting toward southeast in Taurus. It was still bright. Dust coma was round and small, though it was saturated on this frame. Dust tail was wide toward northeast. Greenish ion halo was not dominant. Bluish ion tail was long with kinks toward east southeast beyond the edge of the frame. Ion tail looked yellowish with swirls partly, indicating it including sodium ion. It means that the temperature around the area was higher than 3,000K at the date.
"Comet McNaught C/2006 P1: observation of the sodium emission by the solar telescope THEMIS" by Leblanc F et al 2008:
www.aanda.org/articles/aa/pdf/2008/16/aa8795-07.pdf
North is up, and east is to the left on the frame.
Sun Distance: 0.818 AU
Earth Distance: 1.589 AU
equipment: Takahashi FSQ-106ED, 645 Reducer QE 0.72x, EOS 5Dmark3-SP4, modified by Seo-san on ZWO AM5 Mount, autoguided at a star nearby with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding with comet tracking on
Exposure: 15 times x 60 seconds and 2 x 15 seconds at ISO6,400 and f/3.6. It started at 23:27:25 UTC May 3, 2024.
site: 2,430m above sea level at lat. 24 38 55 South and long. 70 16 52 West near Cerro Armazones Chile
SQML was 21.55 at the night. Ambient temperature was around 6 degrees Celsius or 43 degrees Fahrenheit.