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The allegheny observatory search for planetary systems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gatewood, George D. |
| Copyright Year | 1989 |
| Description | The accomplishments of the observatory's search for planetary systems are summarized. Among these were the construction, implementation, and regular use of the Multichannel Astrometric Photometer (MAP), and the design, fabrication and use of the second largest refractor objective built since 1950. The MAP parallax and planetary observing programs are described. Various developments concerning alternate solid state photodetectors and telescope instrumentation are summarized. The extreme accuracy of the system is described in relation to a study of the position and velocity of the members of the open cluster Upgren 1. The binary star system stringently tests the theory of stellar evolution since it is composed of an evolved giant F5 III and a subgiant F5 IV star. A study that attempts to measure the luminosities, surface temperatures, and masses of these stars is discussed. |
| File Size | 632478 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890014862 |
| Archival Resource Key | ark:/13960/t7qp11h2m |
| Language | English |
| Publisher Date | 1989-04-11 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Spectra Refracting Telescopes Angular Resolution Extrasolar Planets Photometers Stellar Motions Stellar Parallax Astrometry Astronomical Observatories Astronomical Photometry Binary Stars Photoelectric Cells Video Equipment F Stars Planetary Systems Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
