Oval BA merging with white oval by Jon Legarreta Etxagibel ,John H.Rogers


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Oval BA: Possible MERGER with WO is INMINENT by Jon Legarreta Etxagibel
Oval BA merging with white oval by John H.Rogers 白斑BAの白斑とのマージ

Oval BA: Possible MERGER with WO is INMINENT by Jon Legarreta Etxagibel
15 June 2010: Images by different observers show BA is interacting with and adjacent WO. Observers are encouraged to get images of the oval interaction for the next few days. The interaction may lead to many phenomena, oval fussion or circulation of the smaller WO around BA and/or partial destruction of the oval. Every Jupiter rotation will show different phases of the interaction for the next days. Observations in the visible range but also in the 890 nm methane absorption band and/or UV (both sensitive to the atmospheric higher layers) will be very useful to understand the interaction of large vortices on Jupiter at different atmospheric heights. Ephemeris of BA crossing through the central meridian are given in the IOPW webpage ( http://www.ehu.es/iopw/ )
Best wishes
Jon
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Jon Legarreta Etxagibel
Grupo Ciencias Planetarias GCP

Oval BA merging with white oval by John H.Rogers
GOTO Japanese 日本語はこちら
Oval BA is now interacting with the small anticyclonic white oval f. it. Any hi-res or methane-band images of this over the next few days could be very useful. As Chris Go pointed out, in Fabio Carvalho's image on June 17, the AWO is swinging round to the S side of oval BA. The AWO seems to be pushed in the Sp. direction by the STB Remnant, which has also pushed a dark grey blob up against oval BA. (Ganymede blocks the view of the STB Remnant in the June 17 image!)
The set of images also includes other interesting features which observers have pointed out:
The GRS is dark and strongly red.
The narrow residual SEB(N) appears greenish, a rare colour on Jupiter, in many images (including the recently released Hubble image).
In the NEB, small bright rifts are arising repeatedly alongside a dark barge.
In the NNTZ, the long-lived NN-LRS-1 is still red but the colour is not as strong or dark as last year.
Clear skies,
John
_________________________________
John H. Rogers, Ph.D. Jupiter Section Director,
British Astronomical Association

John H. Rogers,Ph.D.
Jupiter Section Director,
[British Astronomical Association.]
●白斑BAの白斑とのマージ

白斑BAが後方の高気圧性小白斑(AWO)と相互作用している。今後数日間の
この領域の高解像度あるいはメタンバンドの画像は非常に役に立つだろう。
Chris Goが指摘するように、6月17日のFabio Carvalhoの画像で、AWOは白斑
BAの南側に向きを変えている。白斑BAに対しても暗灰色の泡を押し上げた
STB断片によって、AWOは南前方に押されたように思われる(6月17日の画像
では、ガニメデがSTB断片の見え方をじゃましている)。

画像には観測者が指摘する別の興味深い様相も見られる。

・大赤斑は暗く赤味が強い。
・残っている狭いSEB(N)は、多くの画像(最近リリースされたハッブルの画像を
　含めて)で、木星ではめったに見られない色である緑がかっている。
・NEBには、小さな明るいリフトが暗いバージと並んで繰り返し現れている。
・NNTZには、長命なNN-LRS-1が今なおも赤いが、色は昨年ほど強くも暗くもない。

John H. Rogers, Ph.D.
Jupiter Section Director,
British Astronomical Association 


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