(BEIJING) JUST IN: Debris from a Chinese rocket is expected to fall back to Earth in an uncontrolled re-entry this weekend but nobody knows where #AceNewsDesk report

#AceNewsReport – May.08: At 18 tonnes it is one of the largest items in decades to have an undirected dive into the atmosphere: The US on Thursday said it was watching the path of the object but currently had no plans to shoot it down: Space debris removal demonstration launches

BEIJING: ‘Big Chinese rocket segment set to fall to Earth: The main segment from the Long March-5b vehicle was used to launch China’s launches first module of new space station

1 hour ago

By Jonathan Amos
BBC Science Correspondent

China Launches Space Station Core Module Tianhe
The rocket was launched to carry a Chinese space station section into orbit

“We’re hopeful that it will land in a place where it won’t harm anyone,” US Defense Secretary Lloyd Austin said. “Hopefully in the ocean, or someplace like that.”

Various space debris modelling experts are pointing to the early hours (GMT) of Sunday as the likely moment of re-entry. However, such projections are always highly uncertain.

Originally injected into an elliptical orbit approximately 160km by 375km above Earth’s surface on 29 April, the Long March-5b core stage has been losing height ever since.

Just how quickly the core’s orbit will continue to decay will depend on the density of air it encounters at altitude and the amount of drag this produces. These details are poorly known. 

Most of the vehicle should burn up when it makes its final plunge through the atmosphere, although there is always the possibility that metals with high melting points, and other resistant materials, could survive to the surface.

When a similar core stage returned to Earth a year ago, piping assumed to be from the rocket was identified on the ground in Ivory Coast, Africa.

The chances of anyone actually being hit by a piece of space junk are very small, not least because so much of the Earth’s surface is covered by ocean, and because that part which is land includes huge areas that are uninhabited.

The zone of potential fall in this case is restricted still further by the trajectory of the rocket stage. It’s moving on an inclination to the equator of about 41.5 degrees. This means it’s possible already to exclude that any debris could fall further north than approximately 41.5 degrees North latitude and further south than 41.5 degrees South latitude.

China has bridled at the suggestion that it has been negligent in allowing the uncontrolled return of so large an object. Commentary in the country’s media has described Western reports about the potential hazards involved as “hype” and predicted the debris will likely fall somewhere in international waters. 

The Global Times quoted aerospace expert Song Zhongping who added that China’s space monitoring network would keep a close watch and take necessary measures should damage occur.

But the respected cataloguer of space activity, Jonathan McDowell from the Harvard-Smithsonian Center for Astrophysics, US, said the situation did reflect poorly on China. 

“It is indeed seen as negligence,” he told BBC News.

“This is the second launch of this rocket; the debris in Ivory Coast last year was from the previous launch, i.e. a basically identical rocket. 

“These two incidents [the one now and the Ivory Coast one] are the two largest objects deliberately left to re-enter uncontrolled since Skylab in 1979.”

Fragments of the US space station Skylab scattered across Western Australian in 1979, attracting worldwide attention. 

Hugh Lewis, who models space debris at Southampton University, UK, noted that more than 60 years of spaceflight had left a large legacy of junk in orbit. The responsibility for this litter rests on several countries, but principally Russia and the US.

“It’s worth remembering that there are approximately 900 orbital rocket stages in low-Earth orbit, left behind by nearly every launch-capable nation and with a combined mass orders or magnitude greater than the one expected to re-enter the atmosphere this [weekend],” Dr Lewis posted on Twitter.Long March-5B rocket launched the Tianhe module on 29 April

Modern practice now calls for rocket stages to be de-orbited as soon as possible after their mission. In the case of large core segments, these would normally come straight back, within one orbit, falling into the ocean or on land (the US company SpaceX now propulsively lands its core stages so they can be used again).

For upper-stages that go into an orbit and may travel around the globe several times as they precisely position a payload, the preference is to include a re-ignitable engine that can steer the stage into a return at the earliest opportunity.

Usually, this would be over an ocean – potentially in the furthest place from land in the South Pacific, between Australia, New Zealand and South America.

Over an area of approximately 1,500 sq km (580 sq miles) this region is a popular graveyard of rocket elements and defunct satellites, where the remains of around 260 missions are thought to be scattered on the ocean floor.Space junk map tracks 200 ‘ticking time bombs’

Additional reporting by Andreas Illmer

#AceNewsDesk report ……Published: May.09: 2021:

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#beijing, #china, #iss

(NASA) International Space Station Report: SPACEX Crew-2 Four new astronauts joined the crew at 07:05am EDT #AceNewsDesk report

#AceNewsReport – Apr.25: The crew members first opened the hatch between the space station and the pressurized mating adapter at 7:05 a.m. EDT then opened the hatch to Crew Dragon:

SpaceX Crew-2 Astronauts Join Station Crew: NASA astronauts Shane Kimbrough and Megan McArthur, along with JAXA (Japan Aerospace Exploration Agency) astronaut Akihiko Hoshide, and ESA (European Space Agency) astronaut Thomas Pesquet aboard the SpaceX Crew Dragon have arrived at the International Space Station.

The four new SpaceX Crew-2 astronauts joined the Expedition 65 crew today bringing the station population to 11. Credit: NASA TV

The four new SpaceX Crew-2 astronauts joined the Expedition 65 crew today bringing the station population to 11. Credit: NASA TV

Mark GarciaApril 24, 2021:

Crew-2 joins Expedition 65 crew of crew of Shannon WalkerMichael Hopkins,  Victor Glover, and Mark Vande Hei of NASA, as well as Soichi Noguchi of JAXA and Roscosmos cosmonauts Oleg Novitskiy and Pyotr Dubrov.

NASA TV will continue to provide live coverage through the welcoming ceremony with leadership from NASA, ESA and JAXA to greet the crew on station. The welcome ceremony is targeted to begin about 7:45 a.m. with the following participants:

  • Steve Jurczyk, acting NASA administrator
  • Kathy Lueders, associate administrator, Human Exploration and Operations Mission Directorate, NASA Headquarters
  • Hiroshi Yamakawa, president, JAXA
  • Josef Aschbacher, director general, ESA

#AceNewsDesk report ………Published: Apr.25: 2021:

Editor says #AceNewsDesk reports by https://t.me/acenewsdaily and all our posts, also links can be found at here for Twitter and Live Feeds https://acenewsroom.wordpress.com/ and thanks for following as always appreciate every like, reblog or retweet and free help and guidance tips on your PC software or need help & guidance from our experts AcePCHelp.WordPress.Com

#astronauts, #iss, #nasa, #spacex

VIDEO: ‘ Russian cosmonauts clean windows of Space Station ISS 320km above earths surface ‘

#AceNewsReport – Aug.11: Russian cosmonauts were cleaning the windows of the International Space Station (ISS) on Monday, more than 320km above the earth’s surface, Reuters said.

ISS commander Gennady Padalka and flight engineer Mikhail Kornienko left the Pirs module at 1520 GMT, embarking on a six-hour spacewalk. They installed equipment to help crew members maneuver outside the ISS, before cleaning a porthole window to remove years of dirt left by exhaust fumes from visiting ships.

The expedition is the 188th ISS spacewalk and the 10th for Padalka, who has spent more time in space than any other human.

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#gennady-padalka, #international-space-station, #iss, #mikhail-kornienko, #russian-cosmonauts

ATLANTIC: ‘ RUSSIAN SPACE AGENCY DELIVERS FOOD TO ISS IN THREE HOURS AFTER US FAILED ‘

#AceWorldNews – ATLANTIC – October 29 – The company behind the dramatic launch explosion of a space station supply mission promises to find the cause of the failure and is warning residents to avoid any potentially hazardous wreckage.

'Russian deliver space station cargo after US flop '

‘Russian deliver space station cargo after US flop ‘

Orbital Sciences Corp.’s unmanned Antares rocket blew up just moments after liftoff Tuesday evening from the Virginia coast.

Meanwhile, early Wednesday, the Russian Space Agency launched its own cargo vessel from Kazakhstan and the spacecraft arrived at the International Space Station six hours later with 3 tons of food. The smooth flight was in stark contrast to the Orbital Sciences’ failed launch, and had been planned well in advance of the accident.

The Orbital Sciences rocket was carrying a Cygnus capsule loaded with 2½ tons of space station experiments and equipment for NASA. No one was injured when the rocket exploded moments after liftoff, shooting flaming debris down onto the launch area and into the ocean.

Ground crews were ready to access the fire-stricken area of NASA’s Wallops Flight Facility at daybreak Wednesday to search for accident debris.

The company’s Cygnus cargo ship was carrying 5,000 pounds of experiments and equipment for NASA, as well as prepackaged meals and, in a generous touch, freeze-dried Maryland crabcakes for a Baltimore-born astronaut who’s been in orbit for five months.

All of the lost materials will be replaced and flown to the 260-mile-high space station, NASA’s station program manager Mike Suffredini said. The six-person space station crew has enough supplies to last well into spring.

The accident is sure to draw scrutiny to the space agency’s growing reliance on private U.S. companies in the post-shuttle era. NASA is paying billions of dollars to Virginia-based Orbital Sciences and the California-based SpaceX company to make station deliveries, and it’s counting on SpaceX and Boeing to start flying U.S. astronauts to the orbiting lab as early as 2017.

It was the fourth Cygnus bound for the orbiting lab; the first flew just over a year ago. SpaceX is scheduled to launch another Dragon supply ship from Cape Canaveral, Florida, in December.

Source:

#ANS2014 

#atlantic, #cygnus, #iss