土星 月惑星研究会 関西支部

Saturn Image 2005/02/04(UT)
瀧本郁夫,
Damian Peach,Richard Bosman,Keck Observatory
I.Takimoto,D.Peach,R.Bosman,Keck
Ikuo Takimoto (310mm Newtonian :ToUcam Pro ) 
2005/02/04 11:43:38(UT)
I=215.0 III=313.8
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.29"  Ring short dia 20.05"
15fps AVI 90sec 1006/1350frams Stacked
---------------------------------------------
2005/02/04 11:56:35(UT)
I=222.6 III=321.1
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.29"  Ring short dia 20.05"
15fps AVI 90sec 649/1349frams Stacked
---------------------------------------------
2005/02/04 11:58:29(UT)
I=223.7 III=322.1
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.29"  Ring short dia 20.05"
15fps AVI 90sec 1016/1349frams Stacked
---------------------------------------------
2005/02/04 12:08:05(UT)
I=229.3 III=327.5
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.29"  Ring short dia 20.05"
15fps AVI 90sec 930/1349frams Stacked
---------------------------------------------
2005/02/04 12:10:06(UT)
I=230.5 III=328.7
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1103/1350frams Stacked
---------------------------------------------
2005/02/04 12:20:27(UT)
I=236.6 III=334.5
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1034/1345frams Stacked
---------------------------------------------
2005/02/04 12:39:32(UT)
I=247.8 III=345.2
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1179/1350frams Stacked
---------------------------------------------
2005/02/04 12:41:33(UT)
I=248.9 III=346.4
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1184/1349frams Stacked
---------------------------------------------
2005/02/04 12:43:20(UT)
I=250.0 III=347.4
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1184/1350frams Stacked
---------------------------------------------
2005/02/04 13:04:47(UT)
I=262.6 III=359.5
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 45sec 595/674frams Stacked
---------------------------------------------
2005/02/04 13:06:21(UT)
I=263.5 III=  0.3
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1120/1349frams Stacked
---------------------------------------------
2005/02/04 13:24:35(UT)
I=274.2 III= 10.6
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1045/1349frams Stacked
---------------------------------------------
2005/02/04 13:31:18(UT)
I=278.1 III= 14.4
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1054/1350frams Stacked
---------------------------------------------
2005/02/04 13:39:29(UT)
I=282.9 III= 19.0
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1086/1349frams Stacked
---------------------------------------------
2005/02/04 13:43:45(UT)
I=285.4 III= 21.4
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1000/1349frams Stacked
---------------------------------------------
2005/02/04 14:00:11(UT)
I=295.0 III= 30.6
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1146/1349frams Stacked
---------------------------------------------
2005/02/04 14:02:22(UT)
I=296.3 III= 31.9
De=-25.7  E.Dia=20.30"
Ring Long  dia 46.28"  Ring short dia 20.05"
15fps AVI 90sec 1146/1350frams Stacked
---------------------------------------------
コメント：途中から良いシーイングとなった。
          SEBsの体系Iの２８５度付近に白斑（カッシーニの写真で
          見られるようなうねった模様）が時間に伴ない動いているようです。
[Ayauta-gun Kagawa-Prefecture Japan]
≪香川県  綾歌郡  瀧本郁夫≫

Damian Peach (235mm Celestron SCT:ATK-1HS camera)
Poor seeing (partly due to intsrumental turbulence.)
FEBRUARY 4th, 2005.             2005/02/04
8.1" F/11.5 Takahashi Mewlon @ F35.
ATK-1HS CCD camera.
Seeing variable - poor (Pickering 0-.4.)
Transparency excellent (5.5mag.)
Wind W (0-5mph.) Moderate dew.
Eq Diam=20.3"

[Damian Peach: Loudwater, Buckinghamshire, United Kingdom]

Richard Bosman(280mm SC:ATK-2HS) 
 
Seeing 5/10.
C11 and ATK-2HS
200 frames (hand select) was used form the 2300.
[ボスマン:オランダ] 
[Richard Bosman: Netherlands]
Keck I Observatory[PIA07008]
South up Original image tif 322kB

This is the sharpest image of Saturn's temperature emissions taken from the ground; it is a mosaic of 35 individual exposures made at the W.M. Keck I Observatory, Mauna Kea, Hawaii on Feb. 4, 2004.
The images to create this mosaic were taken with infrared radiation. The mosaic was taken at a wavelength near 17.65 microns and is sensitive to temperatures in Saturn's upper troposphere. The prominent hot spot at the bottom of the image is right at Saturn's south pole. The warming of the southern hemisphere was expected, as Saturn was just past southern summer solstice, but the abrupt changes in temperature with latitude were not expected. The tropospheric temperature increases toward the pole abruptly near 70 degrees latitude from 88 to 89 Kelvin (-301 to -299 degrees Fahrenheit) and then to 91 Kelvin (-296 degrees Fahrenheit) right at the pole.
Ring particles are not at a uniform temperature everywhere in their orbit around Saturn. The ring particles are orbiting clockwise in this image. Particles are coldest just after having cooled down in Saturn's shadow (lower left). As they orbit Saturn, the particles increase in temperature up to a maximum (lower right) just before passing behind Saturn again in shadow.
A small section of the ring image is missing because of incomplete mosaic coverage during the observing sequence.


Japanese
これは、地上から撮影された土星の温度放出の最もシャープな画像です。
ハワイ・マウナケアのケック赤外線望遠鏡で撮影した35画像のモザイクです。2004/02/04 赤外線で撮影されました。
17.65 ミクロン付近の波長です。
これは土星の表層の対流圏の温度に対して敏感な波長です。画像の頂上部の目立つ過熱点は、土星の南極点です。
土星のは南半球は夏至を越えたところなので、南半球の暖まっていることは予期していましたが、緯度帯による温度の突然の段差は予期せぬものでした。
対流圏の温度は、 89゜k ( -184゜) に、その後、極点の 91゜k (-182゜) 左側、土星の緯度-70゜〜-88゜突然極点の方へ温度が増加しています。
リングの粒子は、土星の周りの軌道上どこでも一定というわけではありません。リングはの右回りに回転しており、土星本体の影から出た部分が最も冷たくなっています。リングの粒子が土星のまわりを回転し、再び影に入る直前(左上)まで、粒子の温度が上昇しています。
リングの一部分はモザイクをカバーしきれず、一部欠けています。
[ NASA/JPL : W.M. Keck I Observatory, Mauna Kea, Hawaii]
ALPO-Japan Latest Saturn Section