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?


21st May 2018: TESS successfully completes lunar flyby

TESS successfully completed a lunar flyby on 17 May at 06:34:35 UTC (2:34 AM EST). At its closest approach, TESS was 8,253 km from the lunar surface. Based on the successful lunar fly-by, no adjustment burn was required. The next maneuver is the Period Adjust Maneuver …

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15th May 2018: TESS commissioning nominal and on track for lunar encounter

TESS commissioning has been nominal. The space craft has undergone several phasing orbit burns and turn on and checkout of key subsystems. Since launch on April 18, TESS has reached many mission milestones that include:

  • Separation from the Falcon 9 second stage, solar array deployment, and first contact with NASA …

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9th May 2018: Three-body dynamics in the TESS orbit

TESS is making it's way through the phasing orbits, onward to the lunar flyby on May 18. Papers describing the peculiarities and intricacies of the orbit are available in papers from 2014 and 2016 on our documentation page.

While in the final science orbit, TESS, like anybody in a three-body …

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Tweets from TESS