عنوان

Developments in Astrometry and Their Impact on Astrophysics and Geodynamics

شابک

9780792322382

شابک

9789401117111

شماره

dltt

عنوان اصلي

Developments in Astrometry and Their Impact on Astrophysics and Geodynamics

نام عام مواد

[Book]

ساير اطلاعات عنواني

Proceedings of the 156th Symposium of the International Astronomical Union Held in Shanghai, China, September 15-19, 1992 /

نام نخستين پديدآور

edited by Ivan I. Mueller, Barbara Kołaczek.

محل نشرو پخش و غیره

Dordrecht :

نام ناشر، پخش کننده و غيره

Imprint: Springer,

تاریخ نشرو بخش و غیره

1993.

عنوان فروست

International Astronomical Union / Union Astronomique Internationale ;

مشخصه جلد

156

متن يادداشت

Space Optical Astrometry -- Ground-Based Optical Astrometry -- Very Long Baseline Interferometry (VLBI) -- Impact on Astrophysics -- Impact on Geodynamics -- Celestial Reference Frame -- Terrestrial Reference Frame -- Miscellaneous -- Author Index.

بدون عنوان

0

متن يادداشت

In this review talk, I would like to report on the proper motion analysis, which has been recently carried out together with M. Soma and M. Yoshizawa: There has been a persistent demand in astronomy for accurate stellar positions and proper motions, which are represented by an inertial reference system constructed on the basis of a set of consistent astronomical constants. In the reference system the precessional constant plays a primary role. In a series of papers Fricke (1967a,b, 1977a,b) has deter mined the luni-solar precessional correction to Newcomb's value and the fictitious motion of the equinox, which have been adopted in the "IAU (1976) System of Astronomical Con stants". Based on the precessional correction and the equinoctial motion thus established, the fundamental reference system, the FK5 system (Fricke et al. 1988) for positions and proper motions, has been constructed. However, for several years geodetic VLBI (McCarthy & Luzum 1991) and LLR (Williams et at. 1991) observations have been suggesting an additional correction to the luni-solar precessional constant of the IAU (1976) System. That is, these observations indicate the precessional correction of 6. p ~ -0:'30/cent to the FK5 system. But, the observational period ofthe earth orientation is considered to be still insufficient to separate unambiguously the precessional change of the earth orientation from the nutation with the longest period of 18. 6 years.

شماره استاندارد بين المللي کتاب و موسيقي

9780792322382

عنوان

Springer eBooks

عنوان اصلي به زبان ديگر

Proceedings of the 156th Symposium of the International Astronomical Union, held in Shanghai, China, September 15-19, 1992

موضوع مستند نشده

Physical geography.

موضوع مستند نشده

Physics.

مستند نام اشخاص تاييد نشده

Mueller, Ivan I.

مستند نام اشخاص تاييد نشده

Kołaczek, Barbara.

مستند نام تنالگان تاييد نشده

SpringerLink (Online service)

تاريخ عمليات

20190301080600.0

نام الکترونيکي

نوع ماده

[Book]

تكميل شده

Y