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Special Calibs |
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Time Critical |
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Last update of this page: Wed Oct 7 15:41:04 2009
Run State: COMPLETED
USD review status:
O.K.!
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Special Remarks:
Time critical observation: the OB should be started at July 2, UT 04h 57m
Abstract for MTS:
On July 2 UT 05h 12.0m and 05h 47.5m, there will be two close appulses of asteroid 2003 EH1, which is an extinct comet candidate, with stars 2UCAC 24710770 and 2UCAC 24710762. The dust survived within the circum-nuclear space of this extinct comet, if exists, may cause some photometric variations on the background stars. This program is designed to monitor such an effect.
1). The targets of interest of this observation are the two stars, not the asteroid.
2). The asteroid should also be captured to see its actual position for determining the brightness and miss distances. Because the asteroid will be in the same field of view during the entire observing time, and move slow enough, long exposures of the stars (50s in the OB) with no offest and no special guide is OK for detecting it.
3). Some exposures are time-critical, as described in ¨Time-Critical Aspects¨.
4). High time resolution is desired, as described in ¨Special Execution Requirements¨.
5). More flat fields are needed for photometric precision, as described in ¨Special Calibration Information¨.
README of this run:
Web version of approved README readme_76503203.html