Seiichi Yoshida's Diary of Comet Observations (2024)
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Updated on December 10, 2024 |
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Go to Seiichi Yoshida's Diary of Comet Observations in 2025. |
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2024 Dec. 8 (4 comets) |
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I observed 4 comets visually on Dec. 8 in Mt. Tsukuba, Ibaraki, Japan.
I could enjoy an almost once in a lifetime event, occultation of Saturn, in the clear fine weather!
C/2022 E2 ( ATLAS )
12.2 mag Dia. 0.7' DC 4 (40.0-cm reflector 144x)
Small.
C/2023 A3 ( Tsuchinshan-ATLAS )
9.7 mag Dia. 1.2' DC 6 (40.0-cm reflector 75x)
I observed it during the occultation of Saturn. Not easy to see due to the strong moon light and a nearby star.
29P/Schwassmann-Wachmann 1
11.4 mag Dia. 2.8' DC 2 (40.0-cm reflector 75x)
Huge! It's rare for me to see such a big 29P.
333P/LINEAR
11.5 mag Dia. 1.5' DC 3-4 (40.0-cm reflector 75x)
Well visible. Moving fast.
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I observed C/2023 A3 ( Tsuchinshan-ATLAS ) visually on Oct. 20 in Mt. Hanadate, Ibaraki, Japan.
C/2023 A3 ( Tsuchinshan-ATLAS )
3.1 mag DC 5 Tail 7 deg (p.a. 75 deg) (naked eye)
3.9 mag Dia. 10' DC 7-8 Tail 7 deg (p.a. 80 deg) (10x70 monocular)
The comet is still bright. I could see the long tail with my naked eyes. I took a memorial photo of myself standing beside the comet.
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I observed C/2023 A3 ( Tsuchinshan-ATLAS ) visually on Oct. 14 beside Tsurumi River in Yokohama City, Kanagawa, Japan.
C/2023 A3 ( Tsuchinshan-ATLAS )
about 1.5 mag Dia. 4' DC 7 Tail 1.5 deg (p.a. 65 deg) (10x66 monocular)
Fortunately I could see the comet with a long tail, although in the heavy city light and thin clouds in the low sky.
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I observed C/2023 A3 ( Tsuchinshan-ATLAS ) visually on Oct. 13 in Hitachi-Oomiya City, Ibaraki, Japan.
C/2023 A3 ( Tsuchinshan-ATLAS )
about 0.5 mag Dia. 4' DC 7 Tail 7 deg (p.a. 60 deg) (10x70 monocular)
about 1.0 mag DC 7 Tail 2 deg (p.a. 60 deg) (naked eye)
The comet was really excellent, much brighter than expected! I can see the long tail easily with my naked eyes. Really great comet!
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I observed 5 comets visually on May 3 and 4 in Kita-karuizawa, Gunma, Japan.
The weather was very fine with no clouds.
C/2021 S3 ( PanSTARRS )
May 3 11.0 mag Dia. 1.9' DC 3-4 (40.0-cm reflector 75x)
May 4 11.2 mag Dia. 1.6' DC 4 (40.0-cm reflector 75x)
Bright and easy to see.
C/2022 E2 ( ATLAS )
May 4 12.0 mag Dia. 1.8' DC 4-5 (40.0-cm reflector 144x)
Moderately condensed and well visible.
C/2023 A3 ( Tsuchinshan-ATLAS )
May 3 10.8 mag Dia. 0.9' DC 7-8 Tail 2.5' (p.a. 100 deg) (40.0-cm reflector 75x)
May 3 10.5 mag Dia. 2.3' DC 7 (40.0-cm reflector 36x)
May 4 11.1 mag Dia. 1.0' DC 7-8 Tail 4.2' (p.a. 110 deg) (40.0-cm reflector 75x)
May 4 10.8 mag Dia. 2.3' DC 7 (40.0-cm reflector 36x)
Very strong and sharp condensation. It looks very well with a long tail.
13P/Olbers
May 3 8.9 mag Dia. 3.3' DC 5 (40.0-cm reflector 75x)
May 4 9.3 mag Dia. 2.0' DC 5-6 (40.0-cm reflector 75x)
Very bright.
479P/Elenin
May 3 13.2 mag Dia. 0.7' DC 3 (40.0-cm reflector 144x)
May 4 13.0 mag Dia. 0.8' DC 3 (40.0-cm reflector 144x)
Unexpectedly, clearly visible. However, it seems faint although it was reported as 10 mag recently. Maybe I could see the central part only.
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I observed 12P visually on Mar. 29 in Miura City, Kanagawa, Japan.
After the heavy rain and strong wind until the afternoon, suddenly it became completely fine in the evening.
I enjoyed 12P/Pons-Brooks with a tail surrounded with a sound of the sea.
12P/Pons-Brooks
4.8 mag Dia. 7' DC 7 Tail 0.4 deg (p.a. 50 deg) (10x66 monocular)
It brightened furthermore.
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I observed 4 comets visually on Feb. 12 in Mt. Hanadate, Ibaraki, Japan.
It gives me such a profound feeling that we can see both 12P/Pons-Brooks and 13P/Olbers in the sky at the same time, although 13P is too faint to see visually.
C/2022 E2 ( ATLAS )
13.0 mag Dia. 0.9' DC 4 (40.0-cm reflector 257x)
Not strongly condensed.
12P/Pons-Brooks
8.0 mag Dia. 4' DC 5-6 (40.0-cm reflector 75x)
Bright and strongly condensed, although it locates low in the evening glow.
13P/Olbers
fainter than 13.0 mag Dia. 0.5' (40.0-cm reflector 257x)
Not visible.
144P/Kushida
10.5 mag Dia. 2.5' DC 2 (40.0-cm reflector 75x)
Weakly condensed and diffuse.
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Go to Seiichi Yoshida's Diary of Comet Observations in 2023. |