What is the orbit and expected lifetime of Crew Dragon trunk?Can the SpaceX Dragon leave the 'trunk' in...
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What is the orbit and expected lifetime of Crew Dragon trunk?
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$begingroup$
Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.
I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).
But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.
What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?
And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?
spacex reentry dragon-v2
asked 4 hours ago
jkavalikjkavalik
3,57211335
$endgroup$
add a comment |
$begingroup$
Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.
I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).
But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.
What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?
And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?
spacex reentry dragon-v2
asked 4 hours ago
jkavalikjkavalik
3,57211335
$endgroup$
add a comment |
$begingroup$
Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.
I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).
But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.
What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?
And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?
spacex reentry dragon-v2
asked 4 hours ago
jkavalikjkavalik
3,57211335
$endgroup$
Per the timeline mentioned in the webcast the Crew Dragon separated from its trunk before the deorbit burn.
I suppose that happens so clean separation can be confirmed before committing to deorbit as reentry with the trunk still attached would be a problem (and it saves some fuel too).
But it means now there is a standalone Dragon trunk in LEO which might take some time to slow down to (uncontrollably) reentry.
What orbit was it left in? Did the Dragon lower the perigee meaningfully before the separation or is it left near the current ISS altitude?
And how long is it expected to stay there before being slowed down enough to burn in the atmosphere?
spacex reentry dragon-v2
spacex reentry dragon-v2
asked 4 hours ago
jkavalikjkavalik
3,57211335
asked 4 hours ago
jkavalikjkavalik
3,57211335
asked 4 hours ago
jkavalikjkavalik
3,57211335
asked 4 hours ago
jkavalikjkavalik
3,57211335
asked 4 hours ago
jkavalikjkavalik
3,57211335
3,57211335
add a comment |
add a comment |
2 Answers
2
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$begingroup$
According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.
Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
Dep-3 and Dep-4 burns were quite small.
Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
$endgroup$
add a comment |
$begingroup$
Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 2 tons with a 14 m^2 cross section, it should reenter in around 2.4 years.
This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.
I wasn’t able to find the mass of the empty trunk in a brief googling; time to reenter is very roughly linear with mass (cross section and other factors held equal), so time might be closer to one year if the trunk mass is only one ton, for example.
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
$endgroup$
add a comment |
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2 Answers
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2 Answers
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$begingroup$
According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.
Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
Dep-3 and Dep-4 burns were quite small.
Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
$endgroup$
add a comment |
$begingroup$
According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.
Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
Dep-3 and Dep-4 burns were quite small.
Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
$endgroup$
add a comment |
$begingroup$
According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.
Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
Dep-3 and Dep-4 burns were quite small.
Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
$endgroup$
According to a tweet from Jonathan McDowell, it is in a nearly circular orbit.
Dragon Trunk cataloged as object 44064 in a 395 x 401 km orbit, only
a bit below ISS which is in a 406 x 411 k m orbit. Looks like the
Dep-3 and Dep-4 burns were quite small.
Short of information released from SpaceX, lifetime appears to be speculation for now. Mostly depends on the mass/density of the trunk. As it's empty, it could deorbit pretty rapidly (few months). But that remains to be seen.
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
answered 3 hours ago
BowlOfRedBowlOfRed
3,3911019
3,3911019
add a comment |
add a comment |
$begingroup$
Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 2 tons with a 14 m^2 cross section, it should reenter in around 2.4 years.
This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.
I wasn’t able to find the mass of the empty trunk in a brief googling; time to reenter is very roughly linear with mass (cross section and other factors held equal), so time might be closer to one year if the trunk mass is only one ton, for example.
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
$endgroup$
add a comment |
$begingroup$
Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 2 tons with a 14 m^2 cross section, it should reenter in around 2.4 years.
This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.
I wasn’t able to find the mass of the empty trunk in a brief googling; time to reenter is very roughly linear with mass (cross section and other factors held equal), so time might be closer to one year if the trunk mass is only one ton, for example.
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
$endgroup$
add a comment |
$begingroup$
Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 2 tons with a 14 m^2 cross section, it should reenter in around 2.4 years.
This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.
I wasn’t able to find the mass of the empty trunk in a brief googling; time to reenter is very roughly linear with mass (cross section and other factors held equal), so time might be closer to one year if the trunk mass is only one ton, for example.
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
$endgroup$
Referring to this orbital decay calculator using BowlOfRed’s initial altitude figure and assuming the trunk masses about 2 tons with a 14 m^2 cross section, it should reenter in around 2.4 years.
This is highly sensitive to the influence of solar weather on Earth’s atmosphere, so it could be much sooner or much later.
I wasn’t able to find the mass of the empty trunk in a brief googling; time to reenter is very roughly linear with mass (cross section and other factors held equal), so time might be closer to one year if the trunk mass is only one ton, for example.
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
edited 1 hour ago
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
answered 2 hours ago
Russell BorogoveRussell Borogove
86.9k3291376
86.9k3291376
add a comment |
add a comment |
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