Search Results - "Urban, Sean"

A moving group of young stars in Carina—Vela by Makarov, Valeri V., Urban, Sean

“…Accurate two-colour photometry and proper motions of 7096 young X-ray stars in the ROSAT All-Sky Survey Bright Star Catalogue, version 1RXS, are extracted from…”
Get full text

A moving group of young stars in Carina-Vela by Makarov, Valeri V, Urban, Sean

“…Accurate two-color photometry and proper motions of 7096 young X-ray stars in the ROSAT All-Sky Survey Bright Star Catalogue, version 1RXS, are extracted from…”
Get full text

A moving group of young stars in Carina-Vela by Makarov, Valeri V., Urban, Sean

Get full text

Speckle Interferometry at the U.S. Naval Observatory. XXIII by Mason, Brian D, Hartkopf, William I, Urban, Sean E, Josties, Jordan D

“…AJ 156, 240, 2018 The results of 3,989 intensified CCD observations of double stars, made with the 26-inch refractor of the U.S. Naval Observatory, are…”
Get full text

Historical Reflections on the Work of IAU Commission 4 (Ephemerides) by Kaplan, George H, Bangert, John A, Fienga, Agnes, Folkner, William, Hohenkerk, Catherine, Lukashova, Marina, Pitjeva, Elena V, Seidelmann, P. Kenneth, Sveshnikov, Michael, Urban, Sean, Vondrak, Jan, Weratschnig, Julia, Williams, James G

“…As part of a reorganization of the International Astronomical Union (IAU), Commission 4 (Ephemerides) went out of existence after the IAU General Assembly in…”
Get full text

Comparing Tycho-2 Astrometry with UCAC1 by Zacharias, Norbert, Zacharias, Marion I, Urban, Sean E, Hoeg, Erik

“…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…”
Get full text

The astrographic catalogue: a century of work pays off. (US Naval Observatory's completion of the star position catalogue 'Astrographic Catalogue' and the set of sky photographs 'Carte du Ciel') by Urban, Sean E, Corbin, Thomas E

“…Several observatories attempted to develop a catalog of star positions, the 'Astrographic Catalogue,' and a compilation of sky photographs, the 'Cartu du…”
Get full text

The astrographic catalogue a century of work pays off by Urban, Sean E, Corbin, Thomas E

“…Observatories worldwide embarked on a massive project, the "Astrographic Catalogue," in the late 19th century. Data from the unfinished project are helping…”
Get full text

The Full-sky Astrometric Mapping Explorer -- Astrometry for the New Millennium by Horner, Scott D, Germain, Marvin E, Greene, Thomas P, Harris, Fred H, Johnson, Mark S, Johnston, Kenneth J, Monet, David G, Murison, Marc A, Phillips, James D, Reasenberg, Robert D, Seidelmann, P. Kenneth, Urban, Sean E, Vassar, Richard H

“…FAME is designed to perform an all-sky, astrometric survey with unprecedented accuracy. It will create a rigid astrometric catalog of 4x10^7 stars with 5 < m_V…”
Get full text