NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Detection of Terrestrial Planets Using Transit PhotometryTransit photometry detection of planets offers many advantages: an ability to detect terrestrial size planets, direct determination of the planet's size, applicability to all main-sequence stars, and a differential brightness change of the periodic signature being independent of stellar distance or planetary orbital semi-major axis. Ground and space based photometry have already been successful in detecting transits of the giant planet HD209458b. However, photometry 100 times better is required to detect terrestrial planets. We present results of laboratory measurements of an end-to-end photometric system incorporating all of the important confounding noise features of both the sky and a space based photometer including spacecraft jitter. In addition to demonstrating an instrumental noise of less than 10 ppm (an Earth transit of a solar-like star is 80 ppm), the brightnesses of individual stars were dimmed to simulate Earth-size transit signals. These 'transits' were reliably detected as part of the tests.
Document ID
20010094781
Document Type
Preprint (Draft being sent to journal)
Authors
Koch, David (NASA Ames Research Center Moffett Field, CA United States)
Witteborn, Fred (NASA Ames Research Center Moffett Field, CA United States)
Jenkins, Jon (NASA Ames Research Center Moffett Field, CA United States)
Dunham, Edward (NASA Ames Research Center Moffett Field, CA United States)
Boruci, William (NASA Ames Research Center Moffett Field, CA United States)
DeVincenzi, Donald
Date Acquired
August 20, 2013
Publication Date
January 26, 2001
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
PROJECT: RTOP 406-05-01-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.