TCP J21314718+3825463 (2025 Nov.17)
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TCP J21314718+3825463 (2025 Nov.17) (k_kubotera, 2025/11/18 7:56)
TCP J21314718+3825463 (2025 Nov.17)
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投稿日時 2025/11/18 7:56
k_kubotera
投稿数: 4704
投稿数: 4704
11月15日にCBAベルギー天文台のTonny Vanmunster氏からVS-NETにアラートされたSU UMa型矮新星です。通常は、22等くらいらしいですが、増光のためなんとか捕らえることができました。透明度が今ひとつで、かろうじて測光できました。Vフィルタをつけるとシーイングによっては、ほとんど写らず、星像検出にかからないのでNo Filterです。
さすがに16等台の測光は、測定誤差も大きいですが、ゆるやかに74分（0.054日）ほどの周期で振幅0.4等ほどで変光しているように見えます。
This is an SU UMa-type dwarf nova that was alerted to VS-NET by Tonny Vanmunster of the CBA Belgian Observatory on November 15th. It is said to normally be around magnitude 22, but due to increased brightness we managed to capture it. The transparency was not great, so we were just able to measure it. With a V filter, depending on the seeing, it was barely visible and the star image was not detected, so we used no filter.
As expected, photometry at around magnitude 16 has a large measurement error, but it appears to be varying gently with an amplitude of about 0.4 magnitude, with a period of about 74 minutes (0.054 days).
K.Kubotera (VSOLJ code "Kub")
Japan
さすがに16等台の測光は、測定誤差も大きいですが、ゆるやかに74分（0.054日）ほどの周期で振幅0.4等ほどで変光しているように見えます。
This is an SU UMa-type dwarf nova that was alerted to VS-NET by Tonny Vanmunster of the CBA Belgian Observatory on November 15th. It is said to normally be around magnitude 22, but due to increased brightness we managed to capture it. The transparency was not great, so we were just able to measure it. With a V filter, depending on the seeing, it was barely visible and the star image was not detected, so we used no filter.
As expected, photometry at around magnitude 16 has a large measurement error, but it appears to be varying gently with an amplitude of about 0.4 magnitude, with a period of about 74 minutes (0.054 days).
K.Kubotera (VSOLJ code "Kub")
Japan
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