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The Satellite Catalog Number (SATCAT), also known as NORAD Catalog Number, NORAD ID, USSPACECOM object number, is a sequential nine-digit number assigned by the United States Space Command (USSPACECOM), and previously the North American Aerospace Defense Command (NORAD), in the order of launch or discovery to all artificial objects in the orbits of Earth and those that left Earth's orbit. [1]
4899 Candace, provisional designation 1988 JU, is a background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter.It was discovered on 9 May 1988, by astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States.
Geostationary or geosynchronous transfer orbit (GTO): An elliptic orbit where the perigee is at the altitude of a low Earth orbit (LEO) and the apogee at the altitude of a geostationary orbit. Hohmann transfer orbit : An orbital maneuver that moves a spacecraft from one circular orbit to another using two engine impulses .
CSI – (catalog) Catalog of Stellar Identification, a compilation of the catalogs, BD, CD, and CPD; CSO – (telescope) Caltech Submillimeter Observatory; CSP – (astrophysics terminology) composite stellar population; CSPN – (celestial object) central star of planetary nebula. also CSPNe (plural form of CSPN) CSS – (observing program ...
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Charles Messier. The first edition of 1774 covered 45 objects (M1 to M45).The total list published by Messier in 1781 contained 103 objects, but the list was expanded through successive additions by other astronomers, motivated by notes in Messier's and Méchain's texts indicating that at least one of them knew of the additional objects.
In 2019, a preliminary catalog was released. The catalog is called CatWISE. This catalog combines the WISE and NEOWISE data and provides photometry at 3.4 and 4.6 μm. It uses the unWISE images and the Allwise pipeline to detect sources. CatWISE includes fainter sources and far more accurate measurement of the motion of objects. The catalog is ...
An armored vehicle belonging to the UN’s atomic watchdog was hit by a drone strike on its way to inspect a Ukrainian nuclear power plant on Tuesday, in an attack President Volodymyr Zelensky has ...