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| Alternative names | APF |
|---|---|
| Location(s) | Santa Clara County,California, Pacific States Region |
| Coordinates | 37°20′33″N121°38′18″W / 37.34254148°N 121.63826312°W /37.34254148; -121.63826312 |
| Altitude | 1,280 m (4,200 ft) |
| Diameter | 2.4 m (7 ft 10 in) |
| Website | apf |
  Location of Automated Planet Finder | |
 Related media on Commons | |
TheAutomated Planet Finder (APF)Telescope a.k.a.Rocky Planet Finder,[1] is a fullyrobotic 2.4-meter optical telescope atLick Observatory, situated on the summit of Mount Hamilton, east of San Jose, California, USA.[2] It is designed to search forextrasolar planets in the range of five to twenty times the mass of theEarth. The instrument will examine about 10 stars per night. Over the span of a decade, the telescope is expected to study 1,000 nearby stars for planets.[3] Its estimated cost was $10 million.[4] The total cost-to-completion of the APF project was $12.37 million.[2] First light was originally scheduled for 2006, but delays in the construction of the major components of the telescope[5] pushed this back to August 2013.[1] It was commissioned in August 2013.[6]
The telescope uses high-precisionradial velocity measurements to measure the gravitational reflex motion of nearby stars caused by the orbiting of planets. The design goal is to detect stellar motions as small as one meter per second, comparable to a slow walking speed. The main targets will be stars within about 100 light years of the Earth.[1]
Early tests show that the performance of theKen and Gloria Levy Doppler Spectrometer is meeting the design goals. The spectrometer has high throughput and is meeting the design sensitivity of (1.0 m/s),[1] similar to the radial velocity precision ofHARPS andHIRES.
Parts for the telescopes were constructed by international companies:[1]
The telescope is also being used to search for optical signals coming fromlaser transmissions from hypothetical extraterrestrial civilizations (search for extraterrestrial intelligence - SETI). This undertaking is performed for the heavily fundedBreakthrough Listen project of theBerkeley SETI Research Center.[7]
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