Director: K. Horikawa, Secretary: Y. Iga
Jupiter was declining the altitude toward solar conjunction in October. Summer evening brought poor seeing and transparency, which made observation hard. This month, we have received observations listed below.
| Observer | Location | Telescope | Images/Drawings | |
|---|---|---|---|---|
| Fukui, Hideto | (Shizuoka, Japan) | 25cm Refl. | 9 | images |
| Hayashi, Toshio | (Kyoto, Japan) | 35cm SCT | 1 | image |
| Horikawa, Kuniaki | (Yokohama, Japan) | 16cm Refl. | 2 | drawings |
| Kumamori, Teruaki | (Osaka, Japan) | 60cm Refl. | 2 | images |
| Miyazaki, Isao | (Okinawa, Japan) | 40cm Refl. | 8 | images |
| Takimoto, Ikuo | (Kagawa, Japan) | 31cm Refl. | 4 | images |
| Yunoki, Kenkichi | (Osaka, Japan) | 20cm Refl. | 6 | images |
Jupiter was quiet this month, too, and no significant change was observed. Any sign of expected North Temperate Current-C was not seen, and NTrZ and NTZ formed single bright zone together in most images. However, since North Temperate Current-C starts very suddenly, it is necessary to pay attention even near solar conjunction, when Jupiter is hard to observe.
RS was orangish, and its f. end was connected with SEBs by bluish bridge. It somewhat retrograded to about II:106 deg. according to images by Fukui (Jul. 19) and Miyazaki (Jul.28). BA was distinct at II:270.4 deg. (Jul. 20, Fukui). STBn jetstream spots were still active, showing dark spots chain following RS and dark thick STBn between II:180 deg, and BA. STBs white spot for which sudden acceleration was observed was not seen this month due to poor condition. Around SEBs edge, there was a large dark patch at about II:200 deg., spanning almost whole width of STrZ. We must take care not to confuse it with South Tropical Disturbance.
Saturn passed solar conjunction, and reappeared in the east sky of early morning. The first observation of new apparition was made by Ikemura.
| Observer | Location | Telescope | Images/Drawings | |
|---|---|---|---|---|
| Ikemura, Toshihiko | (Nagoya, Japan) | 31cm Refl. | 2 | images |
His image showed light EZ and dark broad SEB. This apparition, inclination of ring plane becomes smaller, and high latitude of northern hemisphere comes to be seen. We expect appearances of white and dark spot as active as in the last apparition.
(September 8, K. Horikawa)