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Zero Debris Charter aims to boost international cooperation on cleaning up Earth's space junk problem
NASA’s OSIRIS-APEX Unscathed After Searing Pass of Sun
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NASA’s OSIRIS-APEX Unscathed After Searing Pass of SunMission engineers were confident NASA’s OSIRIS-APEX (Origins, Spectral Interpretation, Resource Identification – Apophis Explorer) spacecraft could weather its closest ever pass of the Sun on Jan. 2, 2024. Their models had predicted that, despite traveling 25 million miles closer to the heat of the Sun than it was originally designed to, OSIRIS-APEX and its components would remain safe.
The mission team confirmed that the spacecraft indeed had come out of the experience unscathed after downloading stored telemetry data in mid-March. The team also tested OSIRIS-APEX’s instruments in early April, once the spacecraft was far enough from the Sun to return to normal operations. Between December 2023 and March, OSIRIS-APEX was inactive, with only limited telemetry data available to the team on Earth.
Both these images from a camera called StowCam aboard OSIRIS-APEX show the same view taken six months apart, before (left) and after (right) the Jan. 2, 2024, perihelion. Notably, there is no observable difference on spacecraft surfaces, a good indication that the higher temperatures faced during perihelion didn’t alter the spacecraft. Another insight gleaned from the identical view in the two images is that the camera’s performance was also not affected by perihelion. StowCam, a color imager, is one of three cameras comprising TAGCAMS (the Touch-and-Go Camera System), which is part of OSIRIS-APEX’s guidance, navigation, and control system. TAGCAMS was designed, built and tested by Malin Space Science Systems; Lockheed Martin integrated TAGCAMS to the OSIRIS-APEX spacecraft and operates TAGCAMS.The spacecraft’s clean bill of health was due to creative engineering. Engineers placed OSIRIS-APEX in a fixed orientation with respect to the Sun and repositioned one of its two solar arrays to shade the spacecraft’s most sensitive components during the pass.
The spacecraft is in an elliptical orbit around the Sun that brings it to a point closest to the Sun, called a perihelion, about every nine months. To get on a path that will allow it to meet up with its new target Apophis in 2029, the spacecraft’s trajectory includes several perihelions that are closer to the Sun than the spacecraft’s components were originally designed to withstand.
“It’s phenomenal how well our spacecraft configuration protected OSIRIS-APEX, so I’m really encouraged by this first close perihelion pass,” said Ron Mink, mission systems engineer for OSIRIS-APEX, based at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
Besides confirming that the January perihelion worked out according to predictions, engineers found surprises while testing spacecraft components. A couple of instruments came out better than expected after exposure to higher temperatures.
A camera that helped map asteroid Bennu and will do the same at Apophis, saw a 70% reduction in “hot pixels” since April 13, 2023, the last time it was tested. Hot pixels, which are common in well-used cameras in space, show up as white spots in images when detectors accumulate exposure to high-energy radiation, mostly from our Sun.
“We think the heat from the Sun reset the pixels through annealing,” said Amy Simon, OSIRIS-APEX project scientist, based at NASA Goddard. Annealing is a heat process that can restore function of instruments and is often done intentionally through built-in heaters on some spacecraft.
Captured on Oct. 20, 2020, as NASA’s OSIRIS-REx spacecraft collected a sample from the surface of asteroid Bennu, this series of 82 images shows the SamCam imager’s field of view as the spacecraft approached and touched Bennu’s surface. OSIRIS-REx’s sampling head touched Bennu’s surface for approximately 6 seconds, after which the spacecraft performed a back-away burn. Credit: NASA/Goddard/University of ArizonaAnother welcome surprise, said Simon, came from the spacecraft’s visible and near-infrared spectrometer. Before perihelion, the spectrometer, which mapped the surface composition of Bennu, and will do the same at Apophis, seemed to have a rock from Bennu stuck inside its calibration port. Scientist suspected that some sunlight was blocked from filtering through the instrument after the spacecraft, then called OSIRIS-REx, grabbed a sample from asteroid Bennu on Oct. 20, 2020. By picking up the sample and then firing its engines to back away from Bennu, the spacecraft stirred up dust and pebbles that clung to it.
“But, with enough spacecraft maneuvers and engine burns after sample collection,” Simon said, the rock in the calibration port appears to have been dislodged. Scientists will check the spectrometer again when OSIRIS-APEX swings by Earth on Sept. 25, 2025, for a gravitational boost.
OSIRIS-APEX is now operating normally as it continues its journey toward asteroid Apophis for a 2029 rendezvous. Its better-than-expected performance during the first close perihelion is welcome news. But engineers caution that it doesn’t mean it’s time to relax. OSIRIS-APEX needs to execute five more exceptionally close passes of the Sun — along with three Earth gravity assists — to get to its destination. It’s unclear how the cumulative effect of six perihelions at a closer distance than designed will impact the spacecraft and its components.
The second OSIRIS-APEX perihelion is scheduled for Sept. 1, 2024. The spacecraft will be 46.5 million miles away from the Sun, which is roughly half the distance between Earth and the Sun, and well inside the orbit of Venus.
Learn more about the OSIRIS-APEX mission to Apophis
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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Sols 4195-4198: Feels Like Summer
2 min read
Sols 4195-4198: Feels Like Summer Navcam Right image of Fascination Turret to the north from sol 4193 NASA/JPL-CaltechEarth planning date: Friday, May 24, 2024
The first sol of this weekend includes an extremely long, 6-hour DAN activity to measure the amount of hydrogen near the surface, in parallel with a standard midday remote science block including: ChemCam LIBS on a smooth, dark rock named “Shadow Lake,” an RMI 7-frame mosaic of the Gediz Vallis ridge base, and two small Mastcam mosaics to document the rock diversity in this area. Since we have so much power to play with, we’re actually staying awake until beginning a custom afternoon Mastcam imaging block to capture the low-sun-angle lighting on Kukenan butte and Milestone Peak ridge in front of us. Should be a butte-iful view.
On the second sol, it’s time to stretch the old arm! After another standard midday block with more ChemCam and Mastcam remote sensing, the arm will get ready for a full evening of contact science on the workspace blocks we have reachable. There’s no DRT-able rocks here, so MAHLI has two dusty targets named “Second Lake” and “Josephine Lake,” the latter of which will include a 5-frame MAHLI mosaic on the dusty layers. APXS finishes off the evening with two integrations on both Josephine Lake and Second Lake.
The third sol includes one last midday remote sensing block and an hour-long drive, which is proving tricky to plan. There’s sand, spikey rocks, float rocks, you name it we’re driving over it. If we make it all 38.41 meters, we’ll have crossed a major transition in the bedrock and gotten closer to the white stones to the west. I don’t camp much these days, but if I could go anywhere this holiday weekend it’d be where Curiosity is! Except, you know, the radioactive power source…A fourth sol is included this weekend since Curiosity is on a California holiday schedule, but we make it easy on ourselves by using it as a “REMS-only” sol where the only measurements come from REMS (our local Gale weather station). Enjoy the holiday, US-based earthlings!
Written by Natalie Moore, Mission Operations Specialist at Malin Space Science Systems
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15 Years Ago: First Time all Partners Represented aboard the International Space Station
From May 29 to July 17, 2009, for the first time in its history, each of the five partner agencies participating in the International Space Station Program had a crew member living and working aboard the orbiting facility at the same time. The period also marked the beginning of six-person crew habitation, greatly increasing the time available for utilization. The addition of the international partner elements and life support systems to enable the larger crew size made this 49-day event possible. Although international partner crew members routinely live and work aboard the station, its crew size now expanded to seven, having all the partners represented at the same time remains a unique event in the space station’s history.
Left: Plaque commemorating the signing of the 1988 Inter-Governmental Agreement (IGA) governing the International Space Station partnership. Middle: Signatories of the 1998 IGA visit the Space Station Processing Facility at NASA’s Kennedy Space Center in Florida, posing in front of the Unity Node 1 module being prepared for launch. Right: Joint NASA-Roscosmos crew of STS-88, the first space station assembly mission.
The International Space Station as we know it came into existence in 1993 with the merging of Space Station Freedom, a partnership among the United States, Canada, Japan, and the European Space Agency (ESA), with Russia’s planned Mir-2 space station. In January 1998, representatives of these space agencies met at NASA’s Kennedy Space Center in Florida and signed the Intergovernmental Agreement (IGA) that established the framework for use of the orbiting laboratory. The IGA stipulated the contributions of each agency to the program that entitled them commensurate utilization of the research facility as well as long-duration crew member flight opportunities, beginning when their elements had reached the station. Separate agreements covered the flights of International Partner astronauts on space shuttle assembly flights, usually to accompany elements from their agencies. In orbit construction of the space station began 11 months after the signing of the IGA. From the first assembly mission in December 1998 to March 2001, all components belonged to either NASA or Roscosmos, a fact reflected in the makeup of early space shuttle and expedition crews. The crew of the STS-88, the first space shuttle assembly mission, included five NASA astronauts and cosmonaut Sergei K. Krikalev representing Roscosmos.
Left: STS-96 included Julie Payette, third from left, the first Canadian Space Agency astronaut to visit the space station. Middle: STS-92 included Koichi Wakata, right, the first astronaut from the Japan Aerospace Exploration Agency to visit the space station. Right: The joint NASA-Roscosmos space station Expedition 1 crew.
As early assembly continued, select space shuttle missions included International Partner crew members. The Canadian Space Agency’s (CSA) first astronaut to visit the space station, Julie Payette, flew as one of the seven crew members on the second assembly flight, STS-96 in May-June 1999. The first astronaut from the Japan Aerospace Exploration Agency (JAXA) to visit the station, Koichi Wakata, flew on the fifth assembly flight, STS-92 in October 2000. When the Expedition 1 crew arrived to begin permanent habitation of the space station in November 2000, the crew consisted of NASA astronaut William M. Shepherd, and Roscosmos cosmonauts Krikalev and Yuri P. Gidenzko. The next six expeditions maintained the two-and-one crew composition, alternating between expeditions, until the impacts from the Columbia accident reduced crew size to two until Expedition 13. During this time, NASA and Roscosmos each had one crew member on board.
Left: STS-100 included Umberto Guidoni, center, the first European Space Agency (ESA) astronaut to visit the space station. Middle: Expedition 13 included Thomas A. Reiter, left, the first ESA astronaut to serve as a long-duration crew member on the space station. Right: STS-119 delivered Koichi Wakata, right, the first astronaut from the Japanese Aerospace Exploration Agency to serve as a long-duration crewmember on the space station.
The first ESA astronaut to visit the space station, Umberto Guidoni from Italy, served as a mission specialist on STS-100 in April 2001. The seven-member crew also included CSA’s Christopher A. Hadfield, who accompanied and helped install the Canadian Space Station Remote Manipulator System, and Yuri V. Lonchakov from Roscosmos, making the STS-100 crew the most internationally diverse shuttle assembly crew. Thomas A. Reiter from Germany arrived at the station aboard STS-121 in July 2006, joining Expedition 13 as ESA’s first long-duration resident crew member, and also returning the onboard crew size back to three. Wakata arrived at the station on STS-119 in March 2009 as JAXA’s first long-duration crew member, joining Expedition 19’s Lonchakov and E. Michael Fincke. Wakata’s arrival set in motion the steps leading to the unique occasion of having each of the five partners with a crew member living and working aboard the space station at the same time.
Left: Expedition 19 crew of Koichi Wakata of the Japan Aerospace Exploration Agency, left, NASA astronaut E. Michael Fincke, and Yuri V. Lonchakov of Roscosmos. Middle: Gennadi I. Padalka of Roscosmos, left, and NASA astronaut Michael M. Barratt of Expedition 19. Right: Canadian Space Agency astronaut Robert B. Thirsk, left, Roman Y. Romanenko of Roscosmos, and European Space Agency astronaut Frank L. DeWinne of Expedition 20.
Eleven days after Wakata’s arrival, Soyuz TMA-14 delivered replacement Expedition 19 crew members NASA astronaut Michael M. Barratt and Gennadi I. Padalka of Roscosmos. On May 29, ESA’s Frank L. DeWinne and CSA’s Robert B. Thirsk, along with Roman Y. Romanenko of Roscosmos arrived aboard Soyuz TMA-15, and all five space station partners had representatives on board. Their arrival began Expedition 20 and the first period of six-person crew residency.
Left: Preflight crew photo of Expedition 20, the first six-person crew on the space station – Michael M. Barratt (NASA), Frank L. DeWinne (ESA), Robert B. Thirsk (CSA), Koichi Wakata (JAXA), Gennadi I. Padalka (Roscosmos), and Roman Y. Romanenko (Roscosmos). Middle: Inflight photo of the Expedition 20 crew. Right: The Expedition 20 crew members put their heads together.
The period of full international representation proved brief, however, lasting just 49 days, and remains unique to this day. Wakata broke up the party on July 17 when he exchanged places with NASA astronaut Timothy L. Kopra who arrived aboard STS-127. Barratt and Padalka left on Oct. 11, replaced by another NASA-Roscosmos crew. Finally, Romanenko, DeWinne, and Thirsk left on Dec. 1, replaced after a brief gap by a crew consisting of a NASA astronaut, a JAXA astronaut, and a representative of Roscosmos.
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Euclid’s Revolutionary New Images
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A Mental Health Awareness Month Message from Your MAF EAP office: “Suicide and Crises Lifeline”
While NASA promotes the availability of EAP counselors at each Center, there may be reasons when, during a mental health crisis, employees do not think about EAP or cannot remember how to access.
Now, the Suicide and Crises Lifeline (https://988lifeline.org/) is available to anyone, anytime nationwide by calling or texting three numbers from your cell phone “988”. Please check out their link for more information about the Lifeline and additional mental health resources.
For MAF Employee Assistance Program Office support contact Porter Pryor at porter.j.pryor@nasa.gov or call or text 228-363-4910. If you need support grieving a recent or past death of a friend or family member, consider joining the monthly Grief Support Group for SSC/NSSC/MAF/MSFC employees (via NASA Teams) by contacting Porter Pryor.
Additional resources and education available through NASA Occupational Health’s Health4Life link:
