Dictionary of Nomenclature of Celestial Objects
(Last update: 18-Dec-2020)

Result of query: info cati USNO-A1.0$

Details on Acronym:   PMM
   PMM (Precision Measuring Machine) ***** Avoid the usage of PMM, prefer USNO-A1.0 Originof the Acronym: L = Found in the literature
Details on Acronym:   USNO-A1.0
   USNO-A1.0 (US Naval Obs., A1.0 catalogue)= (PMM) Write:<<USNO-A1.0 NNNN-NNNNNNNN>> N: 488006860 Object:*  (SIMBAD class: Star) Note:Stars found in th USNO A1.0 catalogue:
In the format, the 4 first digits 'NNNN' from 0000 to 1725 are representing the distance in 0.1deg to the South Pole (step is 75), and the last 'NNNNNNNN' are a sequential number (8 digits) in the zone, ordered by RA.
The USNO-A1.0 was compiled from the blue/red overlaps of the detection lists generated from scans of POSS-I O and E plates, and SRC-J and ESO-R plates. Ref:=1997USNO1.C......0M byMONET D. , et al. The PMM USNO-A1.0 Catalog., 0-None (1997) A catalogue of astrometric standards. o<USNO-A1.0 NNNN-NNNNNNNN> N=488006860. =E=Catalogue in electronic form as I/243 Originof the Acronym: A = Assigned by the author(s)

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