金星の観測情報

2023/11/09 --	Venus Occultation 2023/11/09 by C.Nuttall 11/26
2023/10/26 --	Venus images from 2023/10/22 to 10/26 by T.Suzuki
2023/10/17 --	Venus images from 2023/10/12 to 10/17 by J.Kurucz
2023/10/07 --	Venus images from 2023/09/29 to 10/07 by J.Kurucz
2023/06/06 --	Venus Alert of asteroid 2021PH27 by M.Delcroix
2023/06/02 --	Venus images from 2023/05/31 to 06/02 by A.Cidadao
2023/05/29 --	Venus images from 2023/05/26 to 29 by A.Cidadao
2023/05/17 --	May12_13_17_Fading_CD by A.Cidadao
2023/04/17 --	New spectra of Venus at 2023/04/17 by Christophe.P
2023/02/14 --	Venus discontinuity with amateur images by J.Peralta
2022/08/31 --	Limb artifact correection and false coloe processing by F.Reali
2022/05/28 --	Venus Observation Alert by Kardasis
2022/05/10 --	Venus from May05 to May10 by A.Cidadao
2022/04/13 --	Report from 04/10 to 04/13 by A.Cidadao
2020/10/16 --	Venus middleclouds 11 to 16 Oct by Kardasis
2020/10/09 --	BepiColombo 1st Flyby of Venus of Ricardo Hueso Alonso
2020/05/30 --	Venus Approaching inferier Conjunction from 2020-05-13 to 30 by N.Minagawa
2020/05/24 --	Phases of the planet Venus 2019.12.20 - 2020.05.24 by Z.Kereszty
2020/05/15 --	Venus images UV and IR April May 2020 by Martin.L
2020/04/09 --	Spectrum of Venus on 2020.04.09 by Z.Kereszty
2020/04/08 --	Near-ultraviolet image of Venus from April 4th to April 8th by T.Akutsu
2020/03/20 --	Venus Planisphere 202003-16-18-19-20 by L.Morrone
2020/01/23 --	Venus infra images 2019.09.22 - 2020.01.23 by Ferenczi

Alert for discontinuity on Venus's dayside in Jan.12,2019 by Javier Peralta (JAXA)
We have seen the cloud discontinuity on the nightside of Venus several
hours ago from IRTF in Hawaii! Concretely, we visualized its transition to
the morning terminator so it should be on the dayside already.
Unfortunately, the discontinuity is in its weaker phase and more apparent
on the northern hemisphere, so you will definitely need to acquire many
images to perform stacking and have chances to watch it on the dayside.

During the year 2016, we saw this feature with the camera IR1 of the
orbiter Akatsuki, using images at 900 nm. So, if the discontinuity is
visible on the dayside, it should be apparent using filters covering
between 800 nm and 1000 nm (Methane 890nm filter or highpass filter should
be ok). Please, let me know if any of you manage to make observations of
the dayside middle clouds along the next 24 hours. This discontinuity
propagates faster to the west than the rest of the clouds!

Best,
       Javier

JAXAのハビエル氏からの緊急アラート（抄訳；長瀬）

数時間前にハワイのIRTFにより金星の夜側に不連続な雲が観測されました。
朝の地域に移動しており現在は昼の領域に達していると推定されます。
残念ながら非常に淡く北半球で顕著なため多くの画像データが求められます。 
この現象は2016年に波長900nmの「あかつき」搭載のカメラIR1にて確認されており、
不連続雲が昼側に見えるとすれば800nmから1000nmのフィルター確認できるはずです。
（メタンバンド890nmかそれ以上のハイパスフィルターにて）
今後24時間以内に金星の昼の部分に雲が確認出来るかどうか観測できましたら是非ご連絡をお願いいたします。
この不連続雲は通常の雲より高速に西に移動しています。



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