![]() Your setup shouldīe such that the pixel scale is no greater than 2"/pixel (preferably) orģ"/pixel (at worst). Size of your CCD's pixels to calculate the pixel scale. You will need to know the focal length of your telescope and the physical What is the purpose of the contact details?Īlmost any type of telescope will do (reflector or refractor).How long does it take for the name to be approved?.How do I write the citation and submit the name?.What's the best way to get my discovery numbered?.How quickly are observations processed by the MPC?.Should I check my observations before reporting them to the Center?.Should I separate my comet and minor-planet observations when submitting them? (Updated 2018 Nov. ![]() What if I can't follow-up a new discovery?.What's the best way to follow-up a new discovery?.How do I understand the designations the Center sends me?.How long does it take to assign a new provisional designation?.Who gets credit when single nighters are linked?.What is the difference between reporting two-nighter and single-nighter new objects?.How do I get a provisional designation assigned to it? What about batches containing observations from two or more observatory codes?.How do I know that the Minor Planet Center has received my observations?.When should I use a discovery asterisk?.What quality of measurements should I aim to produce?.How many observations should I make of each object?.Are there any restrictions on my observatory's name?.The observation format requires an observatory code.Can I report approximate or preliminary measures?.Are there any recommendations regarding e-mail?.What corrections should I apply to the derived positions?.Where should I obtain my comparison star coordinates?.The following questions will be posed, then answered: This document was last updated 2018 November 9. Ongoing research demonstrates the resulting catalog is usable for contemporary astronomical research purposes, including identification of novae, identification and magnitude measurements of supergiants, and variability study.This guide is intended for those observers interested in undertaking anĪstrometric CCD-observing program of minor planet and/or comets. Data sets used can be accessed through the repository here. A vignetting effect causes less light to reach the edges of the plate.Ī pending publication applies these methods, and will be available in the near future.Optical aberrations towards the edges of the field make stars harder to identify,.Faint stars that are near brighter stars, and are therefore missed,.Faint stars that are below the threshold because the sky background subtraction is slightly overestimated,.When those 66,000 matches are even more specific, focusing on 3.25º from the focal center, our source list matches 53,600 stars, just over 81%. In a recent study, this process established a source list of 66,000 stars out of 100,000 possible matches. In a recent study, this process resulted in 66,000 matched sources with a median residual of 1.37 arcsec. The final match leaves us with a catalog with the highest number of matched sources and a low residual. In this final match, we use the coordinates with the least residuals (in our experience, this is RA from non-rotated, and Dec from the rotated scan). Once corrected, the perpendicular scans can be matched again, and the final, corrected catalog can be matched with Gaia. Irregularities introduced by the scanner can be mathematically corrected and applied to the original APT tables. There are, unsurprisingly, errors that occur. (Note that these catalogs are not independent of each other, as we have utilized Gaia to create the plate catalog. Utilizing the Tool for OPerations on Catalogus And Tables (TOPCAT), we match the APT-derived plate catalog with the Gaia catalog. This provides the opportunity to analyze the astrometric and photometric repeatability of results, as well as allows us to utilize the more accurate results from the two scans in further studies. Researchers from Other Colleges & UniversitiesĪfter using the Gaia data to create a plate catalog, we run the whole process again on the rotated plate scan.
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