615 citations · 1k across the 7 of their papers we have counts for
7 papers
Speckle Interferometry at the U.S. Naval Observatory. XXIII
Brian D. Mason, William I. Hartkopf, Sean E. Urban +1
The results of 3,989 intensified CCD observations of double stars, made with the 26-inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system repres…
W1J00 and W2J00: Results of the Observations made with the Six-inch Transit Circle 1977-1982 AND Results of Pole-to-Pole Observations made with the Six-inch and Seven-inch Transit Circles 1985-1996
T. J. Rafferty, E. R. Holdenried, S. E. Urban
The astronomical results contained in this publication represent a continuation of previous work of the United States Naval Observatory Six-inch and Seven-inch transit circles. The…
Historical Reflections on the Work of IAU Commission 4 (Ephemerides)
George H. Kaplan, John A. Bangert, Agnes Fienga +10
As part of a reorganization of the International Astronomical Union (IAU), Commission 4 (Ephemerides) went out of existence after the IAU General Assembly in August 2015. This pape…
The Third US Naval Observatory CCD Astrograph Catalog (UCAC3)
N. Zacharias, C. Finch, T. Girard +27
The third US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC3 was released at the IAU General Assembly on 2009 August 10. It is the first all-sky release in this series and c…
The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
N. Zacharias, S. E. Urban, M. I. Zacharias +4
The second USNO CCD Astrograph Catalog, UCAC2 was released in July 2003. Positions and proper motions for 48,330,571 sources (mostly stars) are available on 3 CDs, supplemented wit…
Comparing Tycho-2 Astrometry with UCAC1
Norbert Zacharias, Marion I. Zacharias, Sean E. Urban +1
The Tycho-2 Catalogue, released in February 2000, is based on the ESA Hipparcos space mission data and various ground-based catalogs for proper motions. An external comparison of t…