Comet 81/P WIld
Comet 81/P Wild

Comet Wild 2 is a short periodic comet with an orbital period of 6 years. Before its close encounter with Jupiter during September 1974 his orbit was almost circular and had a 43 year period. But the gravitational pull of the giant gas planet made Wild 2 to a member of the inner solar system. In 2004 the comet was target of the NASA mission "Stardust", which took samples of the coma and returned them back to earth. Our image was obtained during a trip to southern france in February 2010 and shows a nice 1 degree long tail.


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2007 WV4

was listed as PHA "Potentially Hazardous Asteroid". It was discovered and confirmed by Spacewatch MPEC K07W46 on November 19-21. Follow-up observations came from J95 Great Shefford, H55 ARI Charleston and A17 Guidestar Weinheim. Those observations made it possible to remove it on November 29 from both risk tables of NeoDys and JPL.

The observations at Weinheim where difficult because of moonlight and clouds. During the second set of stacked images clouds limited the exposure to only 5 minutes. Noticable by the shorter streaks of the stars. Surprisingly it was still good visible and with a SNR of well above 6 also measurable. Exposures where interrupted for 50 minutes and a slow moving cloud field demanded a lot of patience from the observer to achieve the third measurement.

Its diameter is thought to be about 500 meters.

2007 WV4

2007 WV4, NEO, 19.1 mag , P.A. 213.5°, 2.77"/min

Stacks no. 1+3 of 600 sec. Stack no. 2 of 300 sec., 14 inch Schmidt-Cassegrain, ST8-XME 2x2 binned,
image scale 1.75"/pixel, image center 04h03m35s, +23°16'32"