8/2/2023 0 Comments Neat astrometryMost CCD fields tend to be rather small (a few tens of arcminutes wide) and Where should I obtain my comparison star coordinates?.Images or by estimating positions by eye. You must not attempt to derive positions by overlaying charts on your Using these x,y measurements (determined to a fraction of a pixel) and theĬomparison star coordinates (taken from a suitable reference catalogueĭo a least-squares plate-constants (LSPC) solution to derive the unknownĬoordinates of the minor bodies. Preferably as many as are on the image) and the minor bodies in each image. Of comparison stars of known position (at least three comparison stars, In broad terms, you will determine pixel x,y for the centers of a number Perform the reductions will depend on the software package you are using. The exact details of how you will make measurements on your images and System and on how much you want to spend. The CCD that is right for you depends on your computer A look throughĪny popular astronomy magazine shows that there are a variety of CCDsĪvailable. It is not our place to recommend specific brands of CCDs. Is a must and this must be checked regularly (as a minimum, at the start ofĮach observing session) against a reliable standard.Īccess to e-mail is also important, both for reporting observations toĪnd receiving designations from the Minor Planet We suggest you consult theįor information about the lastest popular software.Īn accurate clock/watch set to Coordinated Universal Time (UTC) Various software packages are available to You will also need a computer to capture the images and software to Your local setup, then the signal-to-noise of the images may be low asĮach image is spread over a large number of pixels. If your pixel scale is much larger than the values quoted above, then the The capabilities of your telescope and CCD and the seeing at your site. That you will have to determine for yourself, taking into consideration In practice, your optimal pixel scale is something 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?.The following questions will be posed, then answered: This document was last updated 2018 November 9. This guide is intended for those observers interested in undertaking anĪstrometric CCD-observing program of minor planet and/or comets.
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