TESS — Transiting Exoplanet Survey Satellite (Спутник наблюдения за транзитами экзопланет)- 19.04.18

[Димитър]

TESS успешно вышел на орбиту пролета Луны

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 1 ч. назад

.@NASA_TESS Mission Update: After P2M (Perigee 2 Maneuver) was completed, the spacecraft is in Coarse Pointing Inertial mode. Pointing is stable and all spacecraft systems are nominal. The cameras are on and taking data, and are continuing cooling to approximately -85C.

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Jonathan McDowell‏Подлинная учетная запись @planet4589 8 ч. назад

The TESS planet hunter is approaching its third perigee -it is now (May 12 0500 UTC) 220,000 km up, but it will speed to only 870 km above Earth at 1137 UTC May 13. Then it heads out towards its May 17 lunar flyby.

8 ч. назад

TESS will be inside the Lunar gravitational (Hill) sphere of influence from 1218 UTC May 16 to 0047 UTC May 18; closest approach to lunar surface is 8119 km at 0631 UTC May 17.

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 7 мин. назад

.@NASA_TESS Mission Update: The spacecraft is in Coarse Pointing Inertial mode, with the instrument ensemble boresight at -54deg pitch. Battery is healthy and between 33.1-33.3V. No spacecraft activities yesterday, the cameras are on and taking data, and have reached -85C ± 1C.

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 8 ч. назад

.@NASA_TESS Mission Update: Perigee 3 Maneuver (P3M) was completed successfully with nominal performance from the thrusters. #TESS is on its way to a lunar flyby at 06:34:35 UTC on 17th May. @NASAMoon here we come!

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Jonathan McDowell‏Подлинная учетная запись @planet4589 40 сек. назад

The @NASA_TESS spacecraft entered the lunar gravitational sphere of influence (Hill sphere) at 1218 UTC May 16. TESS is currently 37200 km from the lunar surface

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 45 мин. назад

#TESS is on track for a lunar flyby on 17 May at 06:34:35 UTC (2:34 AM EST). At this point, TESS will be 8,253 km from the lunar surface. In the coming days, follow @NASA, @NASAGoddard, @NASAblueshift and @NASA_TESS for more details.

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Jonathan McDowell‏Подлинная учетная запись @planet4589 8 мин. назад

TESS now 29287 km from lunar surface. 8 hours to closest approach

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Jonathan McDowell‏Подлинная учетная запись @planet4589 9 мин. назад

TESS 5 hours to lunar closest approach; distance to lunar surface 20900 km and dropping. Post-encounter Earth orbit will be 99750 x 449600 km x 36.5 deg as of May 25.

[Pirat5]

Jonathan McDowell‏Подлинная учетная запись @planet4589 1 мин.1 минуту назад
TESS has completed its 8252 km lunar flyby and is now climbing out of the lunar gravity well. TESS is currently 19000 km above the lunar surface.

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 2 мин. назад

.@NASA_TESS Mission Update: #TESS successfully completed a lunar flyby on May 17. TESS completed scheduled contact with @NASASCaN's Deep Space Network. Post flyby tracking was confirmed. TESS was 8,253.54 km from the surface of the moon at its closest approach.

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TESS at MIT‏ @TESSatMIT 7 мин. назад

Bright star Beta Centauri shines at the bottom edge of this early image from one of the four @NASA_TESS cameras. There are over 200,000 stars in this image!

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https://www.nasa.gov/feature/goddard/2018/nasa-s-new-planet-hunter-snaps-initial-test-image-swings-by-moon-toward-final-orbit

May 18, 2018

NASA's New Planet Hunter Snaps Initial Test Image, Swings by Moon Toward Final Orbit

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

As part of camera commissioning, the science team snapped a two-second test exposure using one of the four TESS cameras. The image, centered on the southern constellation Centaurus, reveals more than 200,000 stars. 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.

Спойлер

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

TESS will undergo one final thruster burn on May 30 to enter its science orbit around Earth. This highly elliptical orbit will maximize the amount of sky the spacecraft can image, allowing it to continuously monitor large swaths of the sky. TESS is expected to begin science operations in mid-June after reaching this orbit and completing camera calibrations.

https://www.youtube.com/watch?time_continue=2&v=-AIbD2WxyN8
(video 1:19)
An animation of the steps TESS must complete before reaching its final orbit. The observatory just completed its lunar flyby and is on track to reach its final science orbit in mid-June.
Credits: NASA's Goddard Space Flight Center
Download this video in HD formats from the Scientific Visualization Studio at NASA's Goddard Space Flight Center

Launched from Cape Canaveral Air Force Station in Florida on April 18, TESS is the next step in NASA's search for planets outside our solar system, known as exoplanets. The mission will observe nearly the entire sky to monitor nearby, bright stars in search of transits — periodic dips in a star's brightness caused by a planet passing in front of the star. TESS is expected to find thousands of exoplanets. NASA's upcoming James Webb Space Telescope, scheduled for launch in 2020, will provide important follow-up observations of some of the most promising TESS-discovered exoplanets, allowing scientists to study their atmospheres.

TESS is a NASA Astrophysics Explorer mission led and operated by MIT in Cambridge, Massachusetts, and managed by NASA's Goddard Space Flight Center in Greenbelt, Maryland. Dr. George Ricker of MIT's Kavli Institute for Astrophysics and Space Research serves as principal investigator for the mission. Additional partners include Orbital ATK, based in Dulles, Virginia; NASA's Ames Research Center in California's Silicon Valley; the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts; and the Space Telescope Science Institute in Baltimore. The TESS science instruments were jointly developed by MIT's Kavli Institute for Astrophysics and Space Research and MIT's Lincoln Laboratory. More than a dozen universities, research institutes and observatories worldwide are participants in the mission.

Banner image: An illustration of TESS as it passed the Moon during its lunar flyby. This provided a gravitational boost that placed TESS on course for its final working orbit. Credit: NASA's Goddard Space Flight Center

By Claire Saravia
NASA's Goddard Space Flight Center, Greenbelt, Md.

[свернуть]

Last Updated: May 18, 2018
Editor: Rob Garner

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 4 мин. назад

.@NASA_TESS Mission Update: Based on great performance from the lunar fly-by, no adjustment burn is required. The next maneuver is the Period Adjust Maneuver (PAM) on May 30th; it will put #TESS into final science orbit. Observatory is in Coarse Pointing Mode operating nominally.

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Jonathan McDowell‏Подлинная учетная запись @planet4589 1 ч. назад

TESS is now 448000 km from Earth, and about 280000 km from the Moon, coasting in the outer part of the Earth-Moon system. It will come back in to a 99,000 km perigee on May 30

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Orbital ATK‏Подлинная учетная запись @OrbitalATK 5 мин.5 минут назад


Congratulations @NASA_TESS! The Orbital ATK-built spacecraft successfully completed its lunar flyby with help from our mission operations team based in Dulles, VA. This flyby provided the gravity assist needed to place TESS in its final orbit.

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 3 мин. назад

.@NASA_TESS Mission Update: The Period Adjust Maneuver (PAM) was completed successfully on May 30th. The burn was confirmed as nominal. No trajectory adjustment maneuver will be required. Success! #TESS is in its final lunar resonant orbit!

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Jonathan McDowell‏Подлинная учетная запись @planet4589 28 мин. назад

The TESS orbit adjust burn was planned to occur around 0130 UTC May 30 and change TESS' orbit from 99036 x 435600 km to 99037 x 366905 km, reducing orbital period from 17.47 days to 13.48 days

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 20 ч. назад

.@NASA_TESS Mission Update: The #TESS team are now assessing the final orbit to understand long term eclipse predictions and other parameters that can be used in planning the two year survey for #exoplanets.

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NASA_TESS‏Подлинная учетная запись @NASA_TESS 32 мин. назад

.@NASA_TESS Mission Update: #TESS continues to operate in its science orbit that was reached in May. In one of the last passes, TESS performed a "break dance:" rotating around to evaluate any stray light sources to characterize camera performance for the duration of the mission.