Artemis Moon Program

SLS/Artemis 1: The outbound powered flyby burn should be underway; the OPF burn, the moon's gravity and another engine firing Friday are intended to put the Orion spacecraft in an ultra stable "distant retrograde orbit" some 40k miles above the moon's far side
Click to expand...

https://twitter.com/x/status/1594673101450760193
View: https://twitter.com/cbs_spacenews/status/1594673101450760193?cxt=HHwWgsC-jZSvtaEsAAAA


The Orion spacecraft's Outbound Powered Flyby burn should now be underway. This burn occurs while Orion flying on the back side of the moon without a communications link with Earth.
The Orion main engine will burn for 2 minutes and 30 seconds.
Click to expand...

https://twitter.com/x/status/1594673404937904134
View: https://twitter.com/SpaceflightNow/status/1594673404937904134?
 
Michel Van said:
the Coverage of Artemis 1 remind me of Apollo 8 coverage way back 1968

The Abysmal low quality or lack of picture and Videos...

i miss Walter Cronkite, he gave those moments a Historical grandeur
View: https://www.youtube.com/watch?v=0640NQ6aNZA
Click to expand...
You’re seriously criticising live picture coverage of a man rated vehicle just approaching the moon, using adapted GoPro cameras, something that’s never been done before?
 
SLS/Artemis 1: The outbound powered flyby burn should be underway; the OPF burn, the moon's gravity and another engine firing Friday are intended to put the Orion spacecraft in an ultra stable "distant retrograde orbit" some 40k miles above the moon's far side
Click to expand...

https://twitter.com/x/status/1594673101450760193
View: https://twitter.com/cbs_spacenews/status/1594673101450760193?cxt=HHwWgsC-jZSvtaEsAAAA


The Orion spacecraft's Outbound Powered Flyby burn should now be underway. This burn occurs while Orion flying on the back side of the moon without a communications link with Earth.
The Orion main engine will burn for 2 minutes and 30 seconds.
Click to expand...

https://twitter.com/x/status/1594673404937904134
View: https://twitter.com/SpaceflightNow/status/1594673404937904134?
 
Next flyby will be performed by EQUULEUS, at 16:25 UTC:

EQUULEUS will then make a lunar flyby.
The closest approach to the Moon will be 16:25 UTC on November 21, and the closest approach altitude is expected to be about 5000 km.
Although the Moon will not be visible from Japan at the time of the flyby, we pray for the success.
Click to expand...

https://twitter.com/x/status/1594639381729800193
View: https://twitter.com/EQUULEUS_en/status/1594639381729800193

The @NASA_Orion spacecraft captured this image of the Moon during its sixth day of flight, as it approached its first outbound powered flyby of the #Artemis I mission and its closest lunar approach. https://go.nasa.gov/3Eqcvy7
Click to expand...

https://twitter.com/x/status/1594704617346064386
View: https://twitter.com/NASAArtemis/status/1594704617346064386?
 
Flyaway said:
Michel Van said:
the Coverage of Artemis 1 remind me of Apollo 8 coverage way back 1968

The Abysmal low quality or lack of picture and Videos...

i miss Walter Cronkite, he gave those moments a Historical grandeur
View: https://www.youtube.com/watch?v=0640NQ6aNZA
Click to expand...
You’re seriously criticising live picture coverage of a man rated vehicle just approaching the moon, using adapted GoPro cameras, something that’s never been done before?
Click to expand...
Telemetry Driven Animation (from 2:08:39 and on) is not Live imagery. That's all I am seeing in that video feed once Artemis is reasonably close to the Moon. I understand the loss of signal on the dark side but......

Enjoy the Day! Mark
 
Last edited:
Something annoying with Orion: the SPS lack of delta-v.
Takes 1000 m/s to enter a low lunar orbit: so 2000 m/s IN & OUT
Apollo had 2500 m/s of delta-v in its service module & SPS, so no problem.
Orion only has 1400 m/s, so if it enters low lunar orbit, it can't get out... that's the main raison for the DRO / NRHO peculiar high lunar orbits, including the Gateway emplaced there.
 
Archibald said:
Something annoying with Orion: the SPS lack of delta-v.
Takes 1000 m/s to enter a low lunar orbit: so 2000 m/s IN & OUT
Apollo had 2500 m/s of delta-v in its service module & SPS, so no problem for TLI & TEI.
Orion only has 1400 m/s, so if it enters low lunar orbit, it can't get out... that's the main raison for the DRO / NRHO peculiar high lunar orbits, including the Gateway emplaced there.
Click to expand...

I did not realise that the Orion had such low delta-v in comparison to Apollo's delta-v Archibald, 1400 m/s v's 2500 m/s? Now I know why NASA needs the Gateway.
 
That's the point. To add insult to injury, the engine is the same - Aerojet AJ10-something.
Same engine as in Titan Transtage, Delta stage 2, Apollo, Shuttle OMS (and Vanguard in '58, how about THAT !!!).
Hell of a legacy and durable though little thing. https://en.wikipedia.org/wiki/AJ10
In fact the AJ10 stuck into that Orion service module flew as a Shuttle OMS pod engine many times between 1984 and 2002.
 
Last edited:
Mark Nankivil said:
Flyaway said:
Michel Van said:
the Coverage of Artemis 1 remind me of Apollo 8 coverage way back 1968

The Abysmal low quality or lack of picture and Videos...

i miss Walter Cronkite, he gave those moments a Historical grandeur
View: https://www.youtube.com/watch?v=0640NQ6aNZA
Click to expand...
You’re seriously criticising live picture coverage of a man rated vehicle just approaching the moon, using adapted GoPro cameras, something that’s never been done before?
Click to expand...
Telemetry Driven Animation (from 2:08:39 and on) is not Live imagery. That's all I am seeing in that video feed once Artemis is reasonably close to the Moon. I understand the loss of signal on the dark side but......

Enjoy the Day! Mark
Click to expand...
Apparently the restrictions are due to two things comms limitation and also that ITAR requires some things to be censored first before released to the public.

Quoted from NSF coverage of the media conference.

Two buffers throttling the data release for images:
Data stream itself (comms limitations).
Archiving AND screening (i.e. our good ol' ITAR friend, with possibly a sprinkle of proprietary nonsense-unavoidable censoring)
Click to expand...
There is some good news as Artemis II will feature an optical communications package.

www.nasa.gov

Orion Artemis II Optical Communications System (O2O) - NASA

www.nasa.gov www.nasa.gov
 
Last edited:
Archibald said:
With lunar gravity 1-6th of Earth, lunar lava tubes have grown to gargantuan sizes without collapsing. According to very serious calculations, lunar lava tubes could be THREE MILES WIDE.
Earth largest lava tubes: 30 m diameter
Mars largest lava tubes: 300 m diameter
Moon largest lava tubes: 3000 m diameter

And indeed, LRO, Kaguya and Chandrayaan data showed this


100 miles long lava tubes, 3 miles wide. This, folks, is mind blowing. What's more, every single kg of lunar regolith polished out of the cave interior will be 45% oxygen by weight.

www.nasa.gov

NASA’s LRO Finds Lunar Pits Harbor Comfortable Temperatures - NASA

NASA-funded scientists have discovered shaded locations within pits on the Moon that always hover around a comfortable 63 F (about 17 C) using data from
www.nasa.gov www.nasa.gov

A very comfortable 17°C, average.

What's not to like ? Except the low gravity, perhaps. But such huge caves could house rotating O'Neill cylinders... hence, artificial gravity.
Click to expand...

3000 meters is NOT "3 miles" - it is 3 kilometers!

Since a mile is 1,610 meters, 3,000 meters is only 1.86 miles.

Still pretty darned large.
 
Archibald said:
Something annoying with Orion: the SPS lack of delta-v.
Takes 1000 m/s to enter a low lunar orbit: so 2000 m/s IN & OUT
Apollo had 2500 m/s of delta-v in its service module & SPS, so no problem.
Orion only has 1400 m/s, so if it enters low lunar orbit, it can't get out... that's the main raison for the DRO / NRHO peculiar high lunar orbits, including the Gateway emplaced there.
Click to expand...
Hence the small i for interim in the upper stage.
 
Great Scott ! The way Apollo worked, I was quite sure Orion too had some powerful cameras inside the crew module, peering through the windows. Started with Apollo 9, it never stopped until Apollo 17: Hasselblads, KA-74, KA-80.

Then the unavoidable question: what kind of ground resolution ? Takes at least 5 meters to pick up a LM descent stage.
LRO ground resolution could get as low as 30 cm, so the LM descent stages and everything else including the wheel tracks were quite visible.

(and crap, how to contradict oneself ! Gotta hate those imperial units 2 miles = 1609 m per two, 3218 m.)
 
Flyaway said:
Mark Nankivil said:
Flyaway said:
Michel Van said:
the Coverage of Artemis 1 remind me of Apollo 8 coverage way back 1968

The Abysmal low quality or lack of picture and Videos...

i miss Walter Cronkite, he gave those moments a Historical grandeur
View: https://www.youtube.com/watch?v=0640NQ6aNZA
Click to expand...
You’re seriously criticising live picture coverage of a man rated vehicle just approaching the moon, using adapted GoPro cameras, something that’s never been done before?
Click to expand...
Telemetry Driven Animation (from 2:08:39 and on) is not Live imagery. That's all I am seeing in that video feed once Artemis is reasonably close to the Moon. I understand the loss of signal on the dark side but......

Enjoy the Day! Mark
Click to expand...
Apparently the restrictions are due to two things comms limitation and also that ITAR requires some things to be censored first before released to the public.

Quoted from NSF coverage of the media conference.

Two buffers throttling the data release for images:
Data stream itself (comms limitations).
Archiving AND screening (i.e. our good ol' ITAR friend, with possibly a sprinkle of proprietary nonsense-unavoidable censoring)
Click to expand...
There is some good news as Artemis II will feature an optical communications package.

www.nasa.gov

Orion Artemis II Optical Communications System (O2O) - NASA

www.nasa.gov www.nasa.gov
Click to expand...
Rather sad they have not learned the lessons from SpaceX - good, no excellent, real time coverage of all aspects of the launch and mission are what keeps eyes on and excitement. "Sells" the program more than anything posted/shared later when it is already old news....

Enjoy the Day! Mark
 
FighterJock said:

Damn! I did not expect that kind of damage done to the launch pad during the launch of Artemis 1, let's see if NASA can fix the pad in time for Artemis 2. :eek:
Click to expand...

Given how powerful the SLS rocket is at liftoff I'm not surprised at the level of damage to the launchpad however NASA does have plenty of time to not only repair it but also make structural upgrades to minimise further damage.

The Saturn V is now officially the second most powerful rocket to be launched.
 
BlackBat242 said:
Archibald said:
With lunar gravity 1-6th of Earth, lunar lava tubes have grown to gargantuan sizes without collapsing. According to very serious calculations, lunar lava tubes could be THREE MILES WIDE.
Earth largest lava tubes: 30 m diameter
Mars largest lava tubes: 300 m diameter
Moon largest lava tubes: 3000 m diameter

And indeed, LRO, Kaguya and Chandrayaan data showed this


100 miles long lava tubes, 3 miles wide. This, folks, is mind blowing. What's more, every single kg of lunar regolith polished out of the cave interior will be 45% oxygen by weight.

www.nasa.gov

NASA’s LRO Finds Lunar Pits Harbor Comfortable Temperatures - NASA

NASA-funded scientists have discovered shaded locations within pits on the Moon that always hover around a comfortable 63 F (about 17 C) using data from
www.nasa.gov www.nasa.gov

A very comfortable 17°C, average.

What's not to like ? Except the low gravity, perhaps. But such huge caves could house rotating O'Neill cylinders... hence, artificial gravity.
Click to expand...

3000 meters is NOT "3 miles" - it is 3 kilometers!

Since a mile is 1,610 meters, 3,000 meters is only 1.86 miles.

Still pretty darned large.
Click to expand...

It's the 90km long that blows my mind.

When you do the sums it means there is a vast thermally stable area protected from micrometers and radiation.

Mineral resources, oxygen, water...it's all there.
 
NMaude said:
Given how powerful the SLS rocket is at liftoff I'm not surprised at the level of damage to the launchpad however NASA does have plenty of time to not only repair it but also make structural upgrades to minimise further damage.
Click to expand...
When watching NASA people talking about that I kinda got the impression they were not astonished that there was damage, and this launch might even have been a bit of an experiment to find out what would happen to the structure given the more severe exhaust forces of this rocket.
 

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