Inertial Coordinate System on the Sky pp 129-130 | Cite as
A New Concept of Constructing an Accurate Coordinate System from Ground-Based Optical Observations
Abstract
Based on the expected precision and characteristics of the Low Latitude Meridian Circle (LLMC), and the development of CCD astrometry at Yunnan Observatory, an internally consistent and nonrotating optical celestial coordinate system can be set up through observations with the LLMC and CCDs. To obtain this goal, the main work we plan to do are ( 1 ) to establish a fundamental stellar reference system of several thousand stars based on the absolute obsrvations with the LLMC; (2) to provide the accurate zero-point corrections for the system from observations of minor planets with the LLMC and CCDs; (3) to determine the precessional rotation of the system with respect to an extragalactic reference system with the LLMC and CCDs, thus transforming the system into a quasi-inertial coordinate system; and (4) to obtain the atmospheric refraciton corrections from the observations with the LLMC.
Keywords
Stellar System Minor Planet Inertial Coordinate System Reference Star Zenith DistanceReferences
- Fan, Y., Du, M., Mao, W., Zhou, Y., Zhang, Y.: 1988: “Full-star-adjustment method for calculating meridian and astrolabe catalogues”, Acta Astronomica Sinica, 29, 318–325.ADSGoogle Scholar
- Guo, X.: 1989, “Various methods for determining corrections for the precessional constant: I and II, Publ. Yunnan Observ. f No. 2, 102–121.Google Scholar
- Hu, X., Mao, W.: 1989, “A method for determining the corrections for the equinox and equator by separating the disturbing forces”, Publ. Yunnan Observ., No. 2, 83–95.Google Scholar
- Mao, W., Li, Z., Fan, Y., Hu, X., Du, M., Li, H.: 1986a, “A new method of determining absolute azimuth and latitude and suggestions for a new type of meridian circle“, IAU Symposium 109, 551–555.Google Scholar
- Mao, W., Li, Z., Fan, Y., Hu, X. Du, M.: 1986b, “The quasi-absolute determination of the refraction correction by means of the Low Latitude Meridian Circle”, Publ. de l’Observ. astronom. de Belgrade, No. 35, 315–317.Google Scholar
- Mao, W., Guo, X., Xu, S., Wu, G., Lu, R.: 1989: “Construction of an inertial coordinate system using a CCD”, Astron. Astrophys. 215, 190–194.ADSGoogle Scholar
- Xu, S., Hu, X., Zhang, J.: 1989, “A new method for observing asteroids”, Publ. Yunnan Observ., No. 2, 77–82.Google Scholar