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Posted: 09.08.2019, 15:09
by toutatis
thinking about this too... :think:

Posted: 09.08.2019, 19:41
by gironde
Swift actually needs a refresh
SPITZER ? Yes

I had thought of Akatsuki (Planet-C), Nozomi (Planet-B), Suisei (Planet-A) and Sakigake
Suisei and Sakigake are identical
Nozomi (Planet-B) and Planet-C (Akatsuki) are on HORIZONS

and also Hayabusa1 and 2 which we talked about a lot these days (all 2 on HORIZONS)

:smile: :hi:

Posted: 09.08.2019, 19:51
by toutatis
SPITZER ? Yes

Yes, Gironde...

I had thought of Akatsuki (Planet-C), Nozomi (Planet-B), Suisei (Planet-A) and Sakigake
Suisei and Sakigake are identical
Nozomi (Planet-B) and Planet-C (Akatsuki) are on HORIZONS

and also Hayabusa1 and 2 which we talked about a lot these days (all 2 on HORIZONS)

That is good... :smile:

Posted: 09.08.2019, 22:40
by SpaceFanatic64
Yes, a trajectory for Hayabusa is available on HORIZONS, but it doesn't show launch, cruise, or being around 25143 Itokawa. Rather, it only shows the part where it returns to Earth to deploy the sample capsule.

Posted: 11.08.2019, 15:41
by toutatis
I have found information about inclination of Luna-2 trajectory... and it's about 65 degrees in relation to the Earth Equator... so I made new trajectory for Luna-2... now it more correct, but still some errors because of Celestia.. :biggrin:

In the pictures, start from Baikonur (Kazakhstan),,, and you can see the moment of Luna-2 crash...

Posted: 11.08.2019, 18:25
by SpaceFanatic64
toutatis, I have a bit of information you might find useful. Since Hipparcos was an Earth orbiting mission, that means you won't have to create a trajectory. You'll just need orbital parameters. However, you'll still need to create the model from scratch. I hope this saves some pain and anguish.

Posted: 12.08.2019, 09:51
by toutatis
I made this! :smile: :smile: :smile: New and for this moment finale version of trajectory for Luna-2... Now it near the same place... I guess that these errors can be accepted... :smile: :smile: :smile:

Added after 17 minutes 28 seconds:
Next task... SWIFT (USA)... Gipparcos (ESA)... and TRAAC (USA) satellites...

Posted: 12.08.2019, 14:00
by toutatis
Such kind of books I learning before creating trajectories of spacecrafts for Celestia... one from them called "The Mechanics of Space Flights"... and the documents from NASA archive... it's help a lot...

Posted: 16.08.2019, 18:23
by toutatis
New, and finale trajectory for Luna-3...

Posted: 16.08.2019, 18:30
by toutatis
...............

Posted: 26.08.2019, 05:36
by toutatis
The Transit Research and Attitude Control (TRAAC) satellite was launched by the U. S. Navy from Cape Canaveral along with Transit 4B on November 15, 1961....

The 109 kg satellite was used to test the feasibility of using gravity-gradient stabilization in Transit navigational satellites. It provided information on the effects of radiation from nuclear explosions in space, as it was one of several satellites whose detectors provided data for the Starfish Prime test; ultimately its solar cells were damaged by the radiation and it ceased operation. It was among several satellites which were inadvertently damaged or destroyed by the Starfish Prime high-altitude nuclear test on July 9, 1962 and subsequent radiation belt. It is expected to orbit for 800 years at an altitude of about 950 kilometers (590 mi)...
https://en.wikipedia.org/wiki/Transit_Research_and_Attitude_Control

Added after 3 minutes 4 seconds:
.............

Added after 5 minutes 41 seconds:
Current orbital elements at the epoch JD: 2458720.984178 (2019, August 25, 11:37:13 UTC) by data from NORAD (USA)....

Code: Select all

TRAAC
1   205U 61031B   19237.48418587  .00000028  00000-0  46021-5 0  9993
2   205  32.4418 350.2750 0102097 199.9172 159.7445 13.62406410880097


https://www.space-track.org

Posted: 26.08.2019, 15:10
by gironde
the engineering of this satellite is not trivial.

bravo, Toutatis

:clap: :clap: :clap:

Added after 2 minutes 45 seconds:
and I am looking forward to Hipparcos. :smile:

Posted: 26.08.2019, 20:14
by SpaceFanatic64
I thought the new Swift telescope was supposed to be released on the 11th but it never did? :think:

Posted: 27.08.2019, 00:33
by toutatis
the engineering of this satellite is not trivial.

they used the gravity stabilization for this satellite... the full length of the extendable boom with a damping spring is 32 meters in maximum, but in my model is 16 meters.. it's was made specially, because too long models not observable well in Celestia when we want to see it close...

Code: Select all

and I am looking forward to Hipparcos.


I will start it today... :smile:

I thought the new Swift telescope was supposed to be released on the 11th but it never did?

Not new model but old model by NASA,,, I just repaired it and textured, I deleted all visual defects... and this model is ready now...

The Neil Gehrels SWIFT Observatory (SWIFT)...

Posted: 27.08.2019, 06:45
by gironde
the realization of SWIFT was swift :biggrin: :biggrin:

Posted: 27.08.2019, 15:51
by toutatis
the realization of SWIFT was swift

:biggrin: ...

Today I started a new work to create a model of.......... Hipparcos...

Yes, yes... you can observe the progress in creation of the model here in this thread... :biggrin:

I am too busy with my main job, but I will try to create more and more... and more models for Celestia...

Posted: 28.08.2019, 00:08
by Chuft-Captain
toutatis wrote:the full length of the extendable boom with a damping spring is 32 meters in maximum, but in my model is 16 meters.. it's was made specially, because too long models not observable well in Celestia when we want to see it close...

What you can do to make the close viewing easier, is to place a couple of invisible placeholders at strategic locations by adding the following code to the SSC:

Code: Select all

"TRAAC Body" "Sol/Earth/TRAAC"
{
   Class "Invisible"
   Radius   0.001
   OrbitFrame
   {
      BodyFixed   { Center "Sol/Earth/TRAAC" }
   }
   FixedPosition [ 0 0 0.014 ]
   
   BodyFrame
   {
      BodyFixed   { Center "Sol/Earth/TRAAC" }
   }
   FixedRotation {}
}


"TRAAC Damping Spring" "Sol/Earth/TRAAC"
{
   Class "Invisible"
   Radius   0.001
   OrbitFrame
   {
      BodyFixed   { Center "Sol/Earth/TRAAC" }
   }
   FixedPosition [ 0 0 -0.014 ]
   
   BodyFrame
   {
      BodyFixed   { Center "Sol/Earth/TRAAC" }
   }
   FixedRotation {}
}


For the full length version, your positions will probably be more like:

Code: Select all

FixedPosition [ 0 0 0.030 ]
FixedPosition [ 0 0 -0.030 ]
respectively.

Then just select and follow/sync with one of the two placeholders (depending on which end you wish to view).

CC

Posted: 28.08.2019, 14:00
by toutatis
What you can do to make the close viewing easier, is to place a couple of invisible placeholders at strategic locations by adding the following code to the SSC:
Wow... Thanks very much Chuft-Captain...

Posted: 29.08.2019, 03:35
by Chuft-Captain
toutatis wrote:Wow... Thanks very much Chuft-Captain...
You're welcome...No big deal. :)

FYI,

This model exhibits some very bad Z-fighting from certain viewpoints, which detracts from an otherwise very nice model.

e.g: click this celURL

YMMV, but I have attached a short video of what I'm seeing from that viewpoint ...

In modelling for Celestia it's necessary to try and avoid having overlapping parallel surfaces too close to each other, if at all possible. (eg. Your solar panels, etc....)

CC

Posted: 29.08.2019, 04:33
by SpaceFanatic64
Thanks, for the patch, Chuft-Captain. Also, 1200th post!