Welcome to TESS Asteroseismic Science Operations Center

The TESS Asteroseismic Science Operations Center (TASOC) provides asteroseismological data from the NASA TESS mission to astronomers who are members of the TESS Asteroseismic Science Consortium (TASC). It is also the platform used to facilitate the international collaborations within TASC.

If you are a member of TASC, please log in below...

In order to have access to TASOC you have to be a member of TASC. Please see the "New TASC member" page on how to become a member.


8th Jun 2018: Wondering what the TIC is for your favorite target?

Then we have made it easy for you to find out. Just go to the "Star Catalog" and put in the name of your favorite target, and voila!
The Star Catalog will automatically cross-match the name you enter with TIC and SIMBAD and should give you all the information about your target in the blink of an eye.
Give it a try!

2nd May 2018: Minor updates to TASC Target List

We have made some minor changes to the TASC Target List (version 06.04; 2018-04-30), mainly in the targets used for the TESS time verification.

23rd Apr 2018: Scheduled Downtime: 25th April

On Wednesday 25th April, we will be doing some scheduled maintenance of our servers, so TASOC will be unavailable most of the day. We apologize for any inconvenience.

TESS mission clock

Launch Countdown:

Where is TESS right now?


6th Aug 2018: Sector 1 preliminary GI target list available

A preliminary list of targets Sector 1 targets that were requested and observed through the TESS Guest Investigator program is now available. Additionally, estimated dates for future sectors, and targets for those sectors is available on the status page.

We have also updated the TESS web tool to now give …

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27th Jul 2018: TESS Spacecraft Starts Science Operations

NASA’s Transiting Exoplanet Survey Satellite has started its search for planets around nearby stars, officially beginning science operations on July 25, 2018. TESS is expected to transmit its first series of science data back to Earth in August, and thereafter periodically every 13.5 days, once per orbit, as …

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11th Jul 2018: NASA’s TESS spacecraft continues testing prior to first observations

After a successful launch on April 18, 2018, NASA's newest planet hunter, the Transiting Exoplanet Survey Satellite, is currently undergoing a series of commissioning tests before it begins searching for planets. The TESS team has reported that the spacecraft and cameras are in good health, and the spacecraft has successfully …

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Tweets from TESS