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NASAWatch on CGTN Talking About TESS

By Keith Cowing
NASA Watch
April 17, 2018
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NASA Watch founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber.

2 responses to “NASAWatch on CGTN Talking About TESS”

  1. RocketScientist327 says:

    Looking good Keith and nice job. Spot on…

    “Because we can”.

  2. Saturn1300 says:

    Enjoyed all the video about TESS. Here is a little writing about some details from Wiki.

    TESS’s two-year all-sky survey will focus on nearby G, K, and M type stars with apparent magnitudes brighter than magnitude 12.[18] Approximately 500,000 stars will be studied, including the 1,000 closest red dwarfs across the whole sky,[4][19] an area 400 times larger than that covered by the Kepler mission.[4] TESS is expected to discover more than 20,000 transiting exoplanets, including 500 to 1000 Earth sized planets and Super-Earths.[5] Of those discoveries, an estimated twenty could be super-Earths located in the habitable zone around a star.[20]
    The survey is broken up into 26 observation sectors, each sector being 24° × 96°,
    with an overlap of sectors at the ecliptic poles to allow for
    additional sensitivity toward smaller and longer-period exoplanets in
    that region of the celestial sphere. The spacecraft will spend two 13.7
    day orbits observing each sector, mapping the southern hemisphere of sky
    in its first year of operation and the northern hemisphere in its
    second year.[21]
    The cameras actually take images every 2 seconds, but all the raw
    images would represent much more data volume than can be stored or
    downlinked: so, cutouts around 15,000 selected stars (per orbit) will be
    coadded to 2-minute cadence and saved on-board for downlink, while
    full-frame images will also be coadded to 30-minute cadence and saved
    for downlink. The actual data downlinks will occur every 13.7 days near
    TESS survey continuous viewing time: Standard areas, 27 days.
    Overlapping viewing areas: 54 days, 81 days, 181 days, and 351 days at
    the ecliptic poles including the JWST continuous viewing zones
    27 days will have a lot of short period planets, but the overlapping areas might find a twin of our Sun system.