Saturday, May 26, 2018

TESS Planet Hunter Snaps 1st Test Image, Completes Lunar Flyby Targeting Last Thruster Firing to Final Science Orbit

This test image from one of the four cameras aboard the Transiting Exoplanet Survey Satellite (TESS) captures a swath of the southern sky along the plane of our galaxy. TESS is expected to cover more than 400 times the amount of sky shown in this image when using all four of its cameras during science operations.  Credits: NASA/MIT/TESS
Ken Kremer  --   SpaceUpClose.com  --   25 May 2018


KENNEDY SPACE CENTER, FL – NASA’s newest planet hunter, the Transiting Exoplanet Survey Satellite (TESS), achieved a pair of key commissioning phase  milestones by powered up its ground breaking cameras to snap its first test image and completing the critical orbit adjusting gravity assist lunar flyby – thereby setting the probe up for the final thruster firing this week required to arrive at its final P/2 resonant science orbit.



Over 200,000 stars are visible in the TESS test image. 

Imagine all the exoplanets soon to be discovered - maybe even a New Earth !

The lunar flyby was successfully carried out on May 17 at 06:31:52.180 UTC when the table sized TESS swung by the moon at an altitude of approximately 8000 kilometers (5000 mi) altitude above the surface.


“NASA’s next planet hunter, the Transiting Exoplanet Survey Satellite (TESS), is one step closer to searching for new worlds after successfully completing a lunar flyby on May 17,” NASA said in a post flyby statement.


“The spacecraft passed about 5,000 miles from the Moon, which provided a gravity assist that helped TESS sail toward its final working orbit.”


The final thruster firing is scheduled for May 30.


The goal of TESS is to carry out an all sky survey and discover dozens of new Earth and Super Earth sized exoplanets beyond our Solar System that may be capable of supporting life, and possibly answer one of humanities most profound questions – “Are We Alone?”





NASA’s TESS Exoplanet hunter being processed by technicians inside the Payload Hazardous Servicing Facility clean room on Feb 20, 2018 at the Kennedy Space Center.  Launch on SpaceX Falcon 9 occurred on April 18, 2018. Credit: Ken Kremer/SpaceUpClose.com/kenkremer.com


The TESS camera test image was taken as part of the spacecraft and camera commissioning phases – but NOT during the lunar flyby.

“No science will be gathered during the flyby,” said Lockwood.

The test image was snapped as part of camera commissioning by the science team for a two-second duration using one of the four identical TESS CCD cameras.

“The image, centered on the southern constellation Centaurus, reveals more than 200,000 stars,” said NASA.

“The edge of the Coalsack Nebula is in the right upper corner and the bright star Beta Centauri is visible at the lower left edge. TESS is expected to cover more than 400 times as much sky as shown in this image with its four cameras during its initial two-year search for exoplanets. A  science-quality image, also referred to as a “first light” image, is expected to be released in June.”


Artist’s concept of NASA’s Orbital ATK-built Transiting Exoplanet Survey Satellite (TESS) planet hunting satellite orbiting the Earth-Moon system. Credit: NASA/Orbital ATK

TESS is making excellent progress towards arriving at its final science orbit - scheduled for mid-June.

P/2 is the name of the TESS missions final science orbit. 


Graphic of NASA’s Transiting Exoplanet Survey Satellite orbit raising maneuvers. Credit: NASA


TESS was just over halfway through the demanding regimen of on board thruster firings required to carry out the preplanned series of six orbit raising maneuvers setting up the ‘do or die’ Lunar Flyby trajectory adjustment on May 17 – absolutely critical to reaching its intended science perch, Orbital ATK TESS program manager Robert Lockwood told SpaceUpClose.com in a pre-flyby interview.

“We are very excited about the lunar flyby!” gushed Lockwood.

The $240 million spacecraft was built by prime contractor Orbital ATK.



The flyby of the Moon on May 17 … will change the orbit significantly ..  and get in position    … to do a period adjustment to get into the special ‘goldilocks’ orbit - the P/2 lunar resonant orbit.”


P/2 is the name of the TESS missions final science orbit. 





TESS is NASA’s second exoplanet mission and a follow up to the hugely successful Kepler probe which discovered over 2300 exoplanets of all sizes.





I asked Lockwood to describe the impact on the mission and how important is the lunar flyby?


“The lunar flyby will change the orbit significantly.  That’s really part of the whole elegance of the mission design. The lunar flyby will put us in an orbit that’s inclined to the ecliptic by about 35 degrees,” Lockwood stated.


“It will also raise our Perigee up to double the distance of GEO. So we’ll be at about 17 Earth radii for the perigee and 70 Earth radii for the apogee.”


“The we will do the period adjust maneuver after that to lower the apogee to about 59 Earth radii.”


“That period adjust maneuver which lasts about 15 minutes will put TESS in exact resonance with the Moon.”


“We are very excited about the lunar flyby!”


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The Transiting Exoplanet Survey Satellite (TESS) successfully blasted off on a two stage SpaceX Falcon 9 rocket at 6:51 p.m. EDT, April 18, from seaside Space Launch Complex-40 on Cape Canaveral Air Force Station, Florida.






NASA’s next planet-hunter, the Transiting Exoplanet Survey Satellite (TESS), successfully launched on a SpaceX Falcon 9 rocket on April 18, 2018 from Space Launch Complex-40 on Cape Canaveral Air Force Station, FL - in this view from a pad camera. TESS will search for new worlds outside our solar system for further study.   Credit: Ken Kremer/kenkremer.com/spaceupclose.com


TESS is a NASA Astrophysics Explorer mission led and operated by MIT and managed by Goddard. George Ricker, of MIT’s Kavli Institute for Astrophysics and Space Research, serves as principal investigator for the mission. TESS’s four wide-field cameras were developed by MIT’s Lincoln Laboratory. Additional partners include Orbital ATK, NASA’s Ames Research Center, the Harvard-Smithsonian Center for Astrophysics, and the Space Telescope Science Institute. More than a dozen universities, research institutes and observatories worldwide are participants in the mission.


Watch for Ken’s continuing onsite coverage of NASA’s TESS, SpaceX, ULA, Boeing, Lockheed Martin, Orbital ATK and more space and mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.


Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news: www.kenkremer.com –www.spaceupclose.com – twitter @ken_kremer - ken at kenkremer.com



Ken Kremer/SpaceUpClose with the TESS spacecraft inside the Payload Hazardous Servicing Facility clean room on Feb 20, 2018 at the Kennedy Space Center.  Launch on SpaceX Falcon 9 occurred on April 18, 2018. Credit: Ken Kremer/SpaceUpClose.com/kenkremer.com

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