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    • USNO-B Catalog ConeSearch

    Metadata Updated: March 13, 2026

    USNO-B is an all-sky catalog that presents positions, proper motions, magnitudes in various optical\npassbands, and star/galaxy estimators for 1,042,618,261 objects derived from 3,643,201,733 separate\nobservations. The data were obtained from scans of 7435 Schmidt plates taken for the various sky surveys\nduring the last 50 years. USNO-B1.0 is believed to provide all-sky coverage, completeness down to V = 21,\n0>2 astrometric accuracy at J2000, 0.3 mag photometric accuracy in up to five colors, and 85% accuracy for\ndistinguishing stars from nonstellar objects.\nA more detailed description of the construction and contents of the USNO-B1 catalog can be found in Monet et al. \n(2003, "The USNO-B Catalog", AJ, 125, 984), http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/usno-b1.0/resolveuid/41be0c1a4d1a8372289bad3baf27cde5.\n\nA mirror of USNOB exists in the MAST holdings and is thus available as a cone search.\nAll available catalogs are listed at http://archive.stsci.edu/vo/mast_services.html.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date March 13, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date March 13, 2026
    Publisher MAST: Mikulski Archive at Space Telescope
    Maintainer
    Identifier ivo://archive.stsci.edu/catalogs/usnob
    Data Last Modified 2026-03-09
    Category Astrophysics
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 1f2c69ac-3d98-43b1-9eb1-29e2a2d266a4
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL ivo://archive.stsci.edu/catalogs/usnob
    License https://www.usa.gov/government-works
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 366f687a37793c61365d15d936343f7ce8574c75bb36a9bbebbd94c7dc37f6ea
    Source Schema Version 1.1

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