Author Topic: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)  (Read 23911 times)

Online Yellowstone10

Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #160 on: 11/04/2023 03:37 pm »
It's slowing down fast

58203    ISS DEB   1998-067WB   DEBRIS   USA   1998-11-20   TTMTR      92.26   51.64   394   376

Yeah, something's weird about the data for VZ (reportedly the Parus nanosat), WA, and WB. VZ is descending faster than you'd expect for a 1U CubeSat (SMA from ISS's 417 km down to 377 km in 11 days since deployment on Oct 25), while WA hasn't descended much at all (SMA down to 414 km), and WB's first data point (from just 2 hours after the bag was lost) has it at an SMA of 392 km. Seems likely that some of those data points are mis-assigned.

Offline Targeteer

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #161 on: 11/04/2023 07:59 pm »
It's slowing down fast

58203    ISS DEB   1998-067WB   DEBRIS   USA   1998-11-20   TTMTR      92.26   51.64   394   376

Yeah, something's weird about the data for VZ (reportedly the Parus nanosat), WA, and WB. VZ is descending faster than you'd expect for a 1U CubeSat (SMA from ISS's 417 km down to 377 km in 11 days since deployment on Oct 25), while WA hasn't descended much at all (SMA down to 414 km), and WB's first data point (from just 2 hours after the bag was lost) has it at an SMA of 392 km. Seems likely that some of those data points are mis-assigned.

58203    ISS DEB   1998-067WB   DEBRIS   US   1998-11-20   TTMTR      92.17   51.64   390   372
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Online Yellowstone10

Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #162 on: 11/06/2023 02:09 am »
Well that makes more sense:

https://twitter.com/planet4589/status/1721282347805393330

Quote
The crew lock bag that floated free during the Nov 1 EVA-89 spacewalk has been cataloged as 58229 / 1998-067WC in a 415 x 416 km orbit

Then WB and VZ, which have similar orbital data (descending to around 370 km already) are probably the two towel bundles from VKD-61, and WA, descending quite a bit more slowly (currently 413 km SMA) must be the Parus nanosatellite.

Offline Targeteer

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #163 on: 11/09/2023 05:54 am »
Well that makes more sense:

https://twitter.com/planet4589/status/1721282347805393330

Quote
The crew lock bag that floated free during the Nov 1 EVA-89 spacewalk has been cataloged as 58229 / 1998-067WC in a 415 x 416 km orbit

Then WB and VZ, which have similar orbital data (descending to around 370 km already) are probably the two towel bundles from VKD-61, and WA, descending quite a bit more slowly (currently 413 km SMA) must be the Parus nanosatellite.

1998-067WC still has not appeared on the Space-track.org website...
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline AnalogMan

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #164 on: 11/09/2023 10:32 am »
"Last week astronauts dropped a toolbag while repairing external parts of the International Space Station (ISS). As we reported, the bag has been picked by trackers of space junk under the code 58229/1998-067WC, and its orbit calculated. It turns out there is more to the story, however, because you don’t need a high-powered telescope to see it, just darkish skies and a pair of binoculars.

[…]"

https://www.iflscience.com/you-can-now-see-the-toolbag-iss-astronauts-dropped-with-just-binoculars-71474

Offline Nicolas PILLET

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #165 on: 11/12/2023 12:38 pm »
....or even postponed if there's a risk of ammonia flying around?

Do we know the coolant fluid is ammonia?

It is not.
Nicolas PILLET
Kosmonavtika : The French site on Russian Space

Offline eeergo

Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #166 on: 11/12/2023 01:38 pm »
....or even postponed if there's a risk of ammonia flying around?

Do we know the coolant fluid is ammonia?

It is not.

Yeah, after the latest VKD this much was proven :) It was shown to be a clear liquid of low viscosity with no particular tendency to boil/sublimate easily in vacuum, or subject to rapid expansion leading to major freezing once released. This can correspond to oils, silicones, some kind of refined solvants... Do we then know if it's common heritage with the silicone oil or benzene-like substances employed in the coolant loop of Soyuz and Progress?
-DaviD-

Offline Targeteer

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #167 on: 11/12/2023 11:20 pm »
Well that makes more sense:

https://twitter.com/planet4589/status/1721282347805393330

Quote
The crew lock bag that floated free during the Nov 1 EVA-89 spacewalk has been cataloged as 58229 / 1998-067WC in a 415 x 416 km orbit

Then WB and VZ, which have similar orbital data (descending to around 370 km already) are probably the two towel bundles from VKD-61, and WA, descending quite a bit more slowly (currently 413 km SMA) must be the Parus nanosatellite.

1998-067WC still has not appeared on the Space-track.org website...

Now on Space-Track.org and descending

58229    ISS DEBRIS   1998-067WC   DEBRIS   US   1998-11-20   TTMTR      92.84   51.64   415   413
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Michael S

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #168 on: 11/13/2023 12:06 pm »
How many tool bags have been accidentally “dropped overboard” over the years?
I remember another incident years ago, and during a press conference someone asked if a Manned Maneuvering Unit could be used to retrieve it before it got to far away. Have there been only 2 incidents, or have there been others?

Online Yellowstone10

Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #169 on: 12/16/2023 04:25 am »
Checking up on the tool bag - it's descended about 10 km since it was lost, now at an SMA of 405 km per Celestrak.

Offline litton4

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Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #170 on: 01/17/2024 03:56 pm »
How's the toolbag doing now?
Dave Condliffe

Online Yellowstone10

Re: US EVA 89 - Nov 01, 2023 ( O’Hara and Moghbeli)
« Reply #171 on: 01/17/2024 05:14 pm »
How's the toolbag doing now?

It's currently in an orbit of 398.5 km by 392.9 km, so it's got a while to go.

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