This project consists in imaging the impact spot detected a few days ago
on Jupiter southern pole.
A galilean satellite will be used as a reference star the camera S27 will be offseted
nearby the southern pole.
Observations will be recorded in 7 NB filters.
We request 2 runs of observations (A and B) which are identical.
For each run the OBs should be executed in the following sequence
MOV_Jup_Short-X
MOV_Jup_LONG-X
PSF_Jup_Short-X
with X='Jul26' or 'Aug01'
the .aocg files were prepared for the Jul26 at 07:00 and Aug01 at 02:00
Our strategy of observation is to identified the reference satellite first (step
1), then uodate the offset to center the camera on Jupiter southern pole (step 2),
take data in 6 SW NB filter, offsetting the telescope toward the south by 30" to
record as well sky (interlaced with image)(step 3). Perform the same observation
in one LW filter (NB3.74) (step 4). Move toward a PSF star PSF HD 208269 star V=8.8,
J 7.54, H 7.26, K 7.13 (step 5) and record frames the same way that we did with
Jupiter (step 6).
step 1 is difficult because Jupiter is bright and if the reference satellites will
be close you may have difficulties to see it. When observations are performed when
the satellite is getting out of transit/occultation (26-Jul-2009 6:30 Europa , 2009-Aug-01 1:30 Callisto,
2009-Aug-02 5:45 Ganymede) it can be very difficult to see it. It depends of the
filter and the wavelength available on the camera control. If I well remember you
use NACO large FOV itself as a camera control, I advice to try to identify the satellites
in NB2.17 (in the methane band) to minimize the glare effect. Another possibility
could be to center first on a further Galilean satellite and offset the telescope
to the closer one by calculating there relative motion. The sky of the wavefront
sensor should be taken north or south of the satellite.
Estimated offset for the period of observation (for step 2)- Offsets with ** are
the BEST ONES (bright spot close the meridian)
Date UT Sat DRa('') DDec('') distance
26-Jul-2009 5:00 Io
5:10 -57.3727 -9.59275 58.1692
5:20 -54.2577 -8.34875 54.8963
5:30 -51.1187 -7.09575 51.6089
5:40 -47.9577 -5.83475 48.3114
26-Jul-2009 6:30 Europa
6:30 -36.1677 -2.59675 36.2608
6:45 -40.0677 -4.13475 40.2805
*7:00* -43.9597 -5.66975 44.3238
7:15 -47.8417 -7.20075 48.3806
7:30 -51.7117 -8.72675 52.4429
7:45 -55.5687 -10.2477 56.5057
2009-Aug-01 1:30 Callisto
1:30 23.7403 27.8103 36.5652
1:45 26.0943 28.7253 38.8079
*2:00* 28.4483 29.6393 41.0827
2:15 30.8003 30.5533 43.3838
2:30 33.1533 31.4673 45.7092
2:45 35.5043 32.3803 48.0524
3:00 37.8553 33.2933 50.4129
2009-Aug-02 7:00 Io
7:00 -55.8177 -8.82575 56.5112
7:15 -51.0677 -6.94775 51.5382
7:30 -46.2677 -5.05275 46.5428
7:45 -41.4237 -3.14275 41.5428
2009-Aug-02 6:15 Ganymede
6:15 15.6643 20.3253 25.6610
6:30 18.7613 21.5403 28.5652
6:45 21.8553 22.7553 31.5508
7:00 24.9463 23.9673 34.5940
7:15 28.0333 25.1783 37.6804
7:30 31.1173 26.3883 40.7998
*7:45* 34.1983 27.5963 43.9440
8:00 37.2743 28.8023 47.1056
8:15 40.3463 30.0063 50.2812
8:30 43.4133 31.2083 53.4665
8:45 46.4753 32.4083 56.6590
9:00 49.5333 33.6053 59.8570
8:45 -55.5797 -8.58975 56.2396
9:00 -50.7927 -6.72075 51.2354
9:15 -45.9577 -4.83275 46.2111
9:30 -41.0787 -2.93075 41.1831
2009-Aug-09 6:30 Europa
6:30 34.0493 24.7983 42.1225
6:45 30.1593 23.2953 38.1084
7:00 26.2533 21.7853 34.1150
7:15 22.3333 20.2713 30.1612
7:30 18.3993 18.7513 26.2706
2009-Aug-09 6:30 Callisto
6:30 -44.0657 -12.0707 45.6891
6:45 -46.4267 -12.9767 48.2062
7:00 -48.7877 -13.8827 50.7245
7:15 -51.1477 -14.7877 53.2425
7:30 -53.5077 -15.6927 55.7614
*7:45* -55.8677 -16.5977 58.2811