海外からの土星の活動報告
- 今年の土星は、SEBn〜EZsにかけて活動的であることが報告されています（浅田秀人氏の土星観測報告）。
- 海外からも、今年の活動について報告が行なわれています。
- ＢＡＡ（英国天文協会）とＡＬＰＯ（米国月惑星観測者協会）の土星セクションに、以下の観測記事が掲載されています。
- 日本語は現象のみこちらで翻訳したものです。
BAA's Latest News
David Gray (415-mm Dall-Kirkham, Spennymoor, Co Durham) reports two conspicuous
white ovals in the Equatorial Zone (South) of Saturn on 1996 August 12.
The first spot appeared elongated with the following end located at 125 deg
(lambda 1). The second spot was more round in form with preceding and
following ends at 144 deg and 157 deg (lambda 1) respectively.
- ８月１２日にEZsに２個の白斑。最初の白斑は伸びていて、後端は125°(I)。
- ２個目はもっと丸く、144°〜157°。
Dr Richard McKim (216-mm Newtonian, Oundle) recorded a diffuse white spot in
the EZ(S) on 1996 September 13, the centre of which was approx 88 deg (lambda 1).
This feature was suspected on Sep 10 and 16.
- ９月１３日にEZsに拡散状の白斑。中心経度は88°(I)。
- ９月１０日と１６日にも見えている可能性がある。
Thomas A Dobbins and David Graham (250-mm Newtonian, Coshocton, Ohio, USA)
observed a prominent feature in the EZ(S) on 1996 October 1. The feature
consisted of a particularly bright region of the EZ(S) with a brilliant
white spot at either end. Transit estimates in System 1 by Graham were as
follows:- first spot, preceding end 248 deg, centre 258 deg, following end
268 deg. Second spot, centre 279 deg, following end 295 deg. Overall the
feature was 47 deg long and took 1h 20m to transit the CM.
- １０月１日にEZsに顕著な明部を観測。端に明るい白斑を伴う。
- 体系Iで、１個目は248°(p)、258°(center)、268°(f)。
- ２個目は279°(center)、295°(f)。
- 全体として47°の長さで、中央子午線通過に１時間２０分かかる。
The EZ(S) October 1 activity does not rival the Great White Spot of 1990
but does appear more significant than similar EZ(N) spots follwed through
the second half of the 1994 apparition. All observers are urged to monitor
Saturn at the present time and are requested to promptly report observations
to the Director.
- １０月１日のEZsの活動は、１９９０年の大白斑の復活ではないが、
- １９９４年後半の出現に続いたEZnの白斑程度に思われる。
ALPO's Saturn Section
OBSERVING ALERT!
During late September and early October of this year, Saturn
observers have been reporting activity in the SEB and EZ (mainly
the EZs) of Saturn. During late September, this activity has
taken the form of non-uniform differentiation of the SEB into
SEBs and SEBn components whereby SEBs has shown a lack of
symmetry along its linear extent across the globe of the planet.
Observers in early October reported a striking brighter EZs.
Let's keep Saturn under close scrutiny for the remainder of the
apparition. Please send reports of any activity seen during
1996, with complete details as to time, date, CMI or CMII
longitudes, instrument used, magnifications, filters, etc.
Drawings, photographs, CCD images, and video images are welcome,
with accompanying intensity estimates, etc. For complete
information on observing Saturn, please contact Julius L.
Benton, Jr., ALPO Saturn Section Coordinator, 305 Surrey Road,
Savannah, GA 31410. E-MAIL: 74007.3446@compuserve.com Telephone:
(912) 897-0951 FAX: (912) 897-0951 (automatic tone detection of
incoming FAX)
- ９月後半と１０月初旬に、SEBとEZ（主にEZs）の活動が報告された。
- ９月後半には、SEBsとSEBnの間のSEBが一様でない形態をしており、
- そのためにSEBsが直線状の広がりから対称がくずれて観測された。
- １０月初旬には著しく明るいEZsが報告された。