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| Longitude | -70° 48' 54.0" |
| Latitude | -30° 09' 54.0" |
| Elevation | 2222 m |
| Telescope Size | 75 cm, 1m |
| Device | 1-channel PMT |
The Cerro Tololo Interamerican Observatory is one of the best observation sites on earth. One can expect approximately 300 photometrical nights and often a seeing, which subceeds 1 arcsecond. There are 8 telescopes located on Cerro Tololo, the largest mirror has a diameter of 4 m (height of dome: 30 meters) and is a twin of the 4 m telescope at KPNO.The 1 m and 75 cm telecopes have been utilized by the DSN.
This site joined in the CD-24 7599 campaign of 1992 and the FG Vir 1995 campaign.