Find Docs

Astronomical Applications Department, U.S. Naval Observatory - pm AAS poster (Page 1)

Wodocs >> Science : Astronomy >> Astronomical Applications Department, U.S. Naval Observatory pm AAS poster Page 1
Astronomical Applications Department, U.S. Naval Observatory - pm AAS poster
An Independent Assessment of a Subset of
Hipparcos and Tycho-2 Proper Motions
George H. Kaplan and Sabrina C. Snell
U.S. Naval Observatory


The positions, proper motions, and parallaxes of 10
stars in the Hipparcos main catalog, derived
from satellite data taken in the early 1990s, define the International Celestial Reference Frame at
optical wavelengths. The Tycho-2 catalog is a 25
densification of the Hipparcos system,
combining data from the Hipparcos satellite with those from a large number of ground-based
astrometric catalogs produced over the last century. Tycho-2 proper motions have been
previously shown to be comparable, in the aggregate, to those in Hipparcos (Urban et al. 2000)
for stars in common.

In this pilot study, we assessed the external accuracy of the proper motions for a selected subset
of stars in the Hipparcos and Tycho-2 catalogs, using an independent source of data, the
observational measures recorded in the Washington Double Star Catalog (WDS). The selected

<< Previous      1 2 3 4 5 6 7 8 9 10 11 12 13 14 15       Next >>

Other Documents:
Gaussian Distribution, Linear Least Squares, Sensitivity Integral, 3 D plot fits, lyap2, NAO 150, Rotate Vector, lyapcalc, wedges, Scifull, Precession Memo, Precession Maple, Curves 3 D, NOVAS 2004 Overview, NOVAS 2006 Overview, thesis, Ranson,

Wodocs share you 300000 free online manuals, brashures and other documents, some pages can be downloaded.

if you have any questions about pm AAS poster online manual, please feel free to contact us
if you can't find Astronomical Applications Department, U.S. Naval Observatory user, owners manual, operating instructions, service manual, quick start guide, mounting,
and installation instructions, RTFM, schematics and user guide, please use search box or contact us.

All copyrights, pictures, pdfs, trademarks and brands are the property of their owners.

WODocs | |
All rights reserved. wodocs.comİ 2009

New Docs

Documents Category:
Arts (Design, Movies, Music, Radio, Television)
Automotive (Cars, Marine, Motorcycle, ATV, Snowmobiles)
Business (Biotechnology and Pharmaceuticals, Chemicals, Construction and Maintenance, Materials, Real Estate, Services)
Electronics (Computers, Motion Control, Power Supply)
Games (Board, Family, Party, Card, Construction, RC Toys)
Health (Animalm, Beauty, Healthcare, Medicine, Pharmacy, Surgery, Weight Loss)
Home (Accessories, Cooking, Decor and Design, Electrical, Family, Pets)
News (Newspapers, Sports, Television)
Recreation (Collecting, Hiking, Scouting, Survival, Travel)
Reference (Education, Libraries and Archives, Museums)
Science (Agriculture, Astronomy, Biology, Chemistry)
Shopping (Antiques and Collectibles, Clothing, Flowers, Food, Home and Garden)
Sports (Bicycle, Snowboard, Skiing, Other)