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Plate Solving
__NOTOC__ Astrometric solving or Plate solving or Astrometric calibration of an astronomical image is a technique used in astronomy and applied on celestial images. Solving an image is finding match between the imaged stars and a star catalogue. The solution is a math model describing the corresponding astronomical position of each image pixel. The position of reference catalogue stars has to be known to a high accuracy so an astrometric reference catalogue is used such as the Gaia catalogue. The image solution contains a reference point, often the image centre, image scale, image orientation and in some cases an image distortion model. With the astrometric solution it is possible to: * Calculate the celestial coordinates of any object on the image. * Synchronize the telescope mount or satellite pointing position to the center of the image taken. In the past, plate solving was done manually by accurately measuring photographic glass plates taken with an astrograph (astrographic ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaia Catalogue
The ''Gaia'' catalogues are star catalogues created using the results obtained by ''Gaia (spacecraft), Gaia'' space telescope. The catalogues are released in stages that will contain increasing amounts of information; the early releases also miss some stars, especially fainter stars located in dense star fields. Data from every data release can be accessed at the ''Gaia'' archive. Initial Gaia Source List The Initial Gaia Source List (IGSL) is a star catalogue of 1.2 billion objects created in support of the ''Gaia'' mission. The mission should have delivered a catalogue based entirely on its own data. For the first catalogue, Gaia DR1, a way was needed to be able to assign the observations to an object and to compare them with the objects from other star catalogues. For this purpose, a separate catalog of objects from several other catalogues was compiled, which roughly represents the state of knowledge of astronomy at the beginning of the Gaia mission. Attitude Star Catalog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrograph
An astrograph (or astrographic camera) is a telescope designed for the sole purpose of astrophotography. Astrographs are mostly used in wide-field astronomical surveys of the sky and for detection of objects such as asteroids, meteors, and comets. Improvements in photography in the middle 19th century led to designs dedicated to astrophotography, and they were also popular in the 20th century. As in other photography, chemicals were used that respond to light, recorded on a glass photographic plate or sometimes on photographic film. Many observatories of this period used an astrograph, beside instruments like the transit telescope, great refractors, and chronometers, or instruments for observing the Sun. Astrographs were often used to make surveys of the night sky, and one of the famous projects was Carte du Ciel. Discoveries using an astrograph include then-planet Pluto. Rather than looking through the telescope, it was discovered by using a blink comparator with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrometry
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other Astronomical object, celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way. History The history of astrometry is linked to the history of star catalogues, which gave astronomers reference points for objects in the sky so they could track their movements. This can be dated back to the ancient Greek astronomer Hipparchus, who around 190 BC used the catalogue of his predecessors Timocharis and Aristillus to discover Earth's precession. In doing so, he also developed the brightness scale still in use today. Hipparchus compiled a catalogue with at least 850 stars and their positions. Hipparchus's successor, Ptolemy, included a catalogue of 1,022 stars in his work the ''Almagest'', giving their location, coordinates, and brightness. In the 10th century, the Iranian astronomer Abd al-Rahman al-Sufi carried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Astrometric Solvers
Programs capable of Astrometric solving: {, class="wikitable" , - !Engine!!Front-end/ installer!!License!!External access!!Blind solving 360° (off line)!!Cloud access to nova.astrometry.net!!MS-Windows (X86)!!Linux (X86)!!Linux (ARM)!!MacOS , - , Astrometry.net, , , , GPL3+, , command-line nova.astrometry.net , , ✓, , ✓, , ✓(Win10 Linux subsystem), , ✓, , ✓, , ✓ , - , ,,, , All sky solver (inc Astrometry.net installer), , GPL3+, , COM interface, , ✓, , -, , ✓(Linux emulator Cygwin), , -, , -, , - , - , ,,, , ANSVR (inc Astrometry.net installer), , GPL3+, , API interface, , ✓, , -, , ✓(Linux emulator Cygwin), , -, , -, , - , - , ,,, , Astrometry.net API lite (inc. installer), , GPL3+, , API interface, , ✓, , -, , ✓(Win10 Linux subsystem), , ✓, , -, , - , - , ,,, , Astrotortilla (inc. Astrometry.net installer), , GPL3+, , -, , ✓, , -, , ✓(Linux emulator Cygwin), , -, , -, , - , - , ,,, , Cloudmakers (inc. Astrometry.net installer), , GPL3+, , ?, , � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
