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Adu astrometry3/5/2023 Revisions to the measures were subsequently made, re-submitted, and accepted on November 13 and 14. ![]() The MPC automated e-mail response indicated that the astrometric observation report was correctly formatted, but that 24 of the 35 observations were rejected due to "inconsistencies in the measures (as determined by their departure from great-circle motion)". ![]() In the observation image, reference stars are circled in green, and Cerberus is outlined by a small, red box.Īfter data reductions were completed, the first batch of observations was submitted to MPC on November 13 at 04:55:06 UT. Below is a Astrometrica screen shot of the first light observation data reduction. A total of 35 observations were completed over three nights October 23-24, 25-26, and 30-31. "First light" to acquire observational data to be submitted to MPC was an image containing the minor planet (1865) Cerberus on October 24 at 02:54:14 UT (start of image integration). In the following weeks, minor planet targets were selected, and observational test runs and astronomic data reductions were completed on the nights of October 11-12 and 18-19 to resolve any program and system issues. The astrometric CCD-observing program began on October 9 with a review of the MPC Guide to Minor Body Astrometry. The test targets, which would later be used to submit astrometric observations to MPC and qualify for an observatory code, are minor planets: Prior to submitting observations to MPC, a number of prerequisites had to be completed, including telescope and CCD camera preparation, software installation and configuration, and target selection. The reductions are reported according to a special format for reporting astrometric observations to the MPC. For more information, please see MPC's "Guide to Minor Body Astrometry".Īstronomic observations are made by taking digital images through a CCD camera, and determining the position of the minor planet or comet in relation to stars contained in the USNO-A 2.0 catalog of approximately one-half billion stars.Īstronomic data reduction (to determine positions) is accomplished through the use of the software package, Astronomica. The MPC assigns a code upon receipt of acceptable observations. The first batch of observations submitted to MPC also consist of a request for an "observatory code". These observations are reported to the to the Minor Planet Center via specially formatted e-mail. Astrometry involves getting precise co-ordinates of objects such as comets and minor planets (asteroids) relative to the "fixed" background stars.
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