Author Topic: Beresheet, SpaceIL Israeli Moon mission  (Read 139148 times)

Offline mcgyver

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Re: Spaceil Israeli Moon mission
« Reply #80 on: 02/28/2019 10:21 am »
If I understand correctly raw data of this file, Beresheet is going to "upgrade" its orbit this night, raising apogee from 74000 to 120000 km:
25/02/2019 9.54 -  74140km
26/02/2019 20.49 - 121232km

Next raisings:
10/3: 276000 km
25/3: 391000 km

Source: http://live.spaceil.com/
No updates in the file, despite issues encountered when attempting to raise apogee.


Offline mcgyver

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Re: Spaceil Israeli Moon mission
« Reply #81 on: 02/28/2019 10:34 am »
Beresheet tracking:


https://www.n2yo.com/satellite/?s=44049#results
https://www.n2yo.com/?s=44049&live=1


At 2019/02/28 11:30 GMT:

NORAD ID: 44049 
Int'l Code: 2019-009B 
Perigee: 630.3 km 
Apogee: 69,038.6 km 
Inclination: 27.7 ° 
Period: 1,387.4 minutes 
Semi major axis: 41205 km 
RCS: Unknown 
Launch date: February 22, 2019
Source: Israel (ISRA)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)

Scheduled for same time:
time, x, y, z, vx, vy, vz (Geocentric)
28 Feb 2019 11:29:40.000,113911.984685,7991.545278,-6419.208835,0.646936,0.610240,0.254133


Apogee altitude in previous "phase":

25 Feb 2019 11:34:40.000,72908.661219,17144.844254,1908.573123,-0.412270,0.770229,0.434940


So we are still in "previous phase".
« Last Edit: 03/01/2019 11:13 am by mcgyver »

Offline Blackstar

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Re: Spaceil Israeli Moon mission
« Reply #82 on: 02/28/2019 01:49 pm »

yes they perform well in any environmental situation... on Earth. On Earth you have (almost) no radiation.


Kinda missing my point: electronics that are ruggedized and perform well on Earth do better in space than electronics that are not ruggedized and do not perform well on Earth. Plus, some automobile electronics are radiation hardened a little bit. It turns out that when you tightly pack electronics, and you operate them over a long period on Earth, occasionally radiation causes an upset. So some electronics for terrestrial use have some radiation hardening.

And again, I'm just discussing how some spacecraft builders are trying to use cheaper electronics in their spacecraft, not the best way to build a spacecraft.

Offline acsawdey

Re: Spaceil Israeli Moon mission
« Reply #83 on: 02/28/2019 02:36 pm »
When is the next burn? I am assuming they can't miss two in a row, no?

Can they even miss one? They might end up having to wait for the moon to be in the right position again. Or, maybe they'll end up doing some sort of tricky "fuzzy boundary" trajectory.

How much can the timing of the perigee burn change the location of the apogee without using too much extra fuel?

If you recall, the MOM (Mangalyaan) mission had a similar profile, initial orbit was basically GTO and it did a series of perigee burns, with the final one inserting it into a mars transfer orbit. The fourth orbit raising burn stopped early and they compensated by adding an extra burn on the next perigee.

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #84 on: 02/28/2019 03:46 pm »
New TLE
epocha 19059.41777308 28.02.2019 10:01:36
622.64 x 69028.26 km 27.6559°
P=23:07:16.87
perigeum time 28.2.2019 19:34 UTC

nothing new
« Last Edit: 02/28/2019 05:02 pm by lamid »

Offline Bogeyman

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Re: Spaceil Israeli Moon mission
« Reply #85 on: 02/28/2019 07:21 pm »
"Successful apogee raising manuever tonight ! At 21:30 Israel time. Thruster worked for 4 minutes. Apogee now about 131,000 km"

Apparently the next apogee maneuver worked. However, I found this in Jason Davis' Twitter account, there's nothing official on SpaceIL yet... Can anyone confirm this?

https://twitter.com/jasonrdavis/status/1101158835576659968

Offline koraldon

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Re: Spaceil Israeli Moon mission
« Reply #86 on: 02/28/2019 08:07 pm »
First perige manuever performed successfully, to apogee of ~130000km :)
https://www.ynet.co.il/articles/0,7340,L-5471740,00.html

Offline Bogeyman

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Re: Spaceil Israeli Moon mission
« Reply #87 on: 02/28/2019 08:17 pm »
How accurate is the NASA solar system simulator? https://eyes.nasa.gov/apps/orrery/
Question also applies to this link: https://www.n2yo.com/?s=44049&live=1

Offline IntoTheVoid

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Re: Spaceil Israeli Moon mission
« Reply #88 on: 02/28/2019 08:24 pm »
https://twitter.com/TeamSpaceIL/status/1101222662444072973
Quote
Moon travel report #4
Beresheet conducted a successful maneuver this evening as the main engine was activated for 4 minutes. The spacecraft is on its way to an elliptical orbit where the furthest point from Earth is at a distance of 131,000 km.

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #89 on: 03/01/2019 03:56 am »
How accurate is the ....
Question also applies to this link: https://www.n2yo.com/?s=44049&live=1

Satelite trackers use TLE from North American Aerospace Defense Command, NORAD. If new data is published,  the app will show them.

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #90 on: 03/01/2019 07:02 am »
If Beresheet is to hit the next deadline on March 7, 11:18 he will make 3 rounds.
my premise: Its orbit 670 x 130330 km P = 3196 min
« Last Edit: 03/01/2019 08:35 am by lamid »

Offline mcgyver

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Re: Spaceil Israeli Moon mission
« Reply #91 on: 03/01/2019 11:29 am »
How accurate is the ....
Question also applies to this link: https://www.n2yo.com/?s=44049&live=1

Satelite trackers use TLE from North American Aerospace Defense Command, NORAD. If new data is published,  the app will show them.
Currently it does not:
Quote
NORAD ID: 44049 
Int'l Code: 2019-009B 
Perigee: 629.8 km 
Apogee: 69,035.6 km 
Inclination: 27.7 ° 
Period: 1,387.3 minutes 
Semi major axis: 41203 km 
RCS: Unknown 
Launch date: February 22, 2019
Source: Israel (ISRA)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)


Does anybody know if Beresheet data are also available on NASA Horizons? I cannot find it with search, but I know some bodys are "unnamed but present", for example "Bennu" appears as "1999 RQ36" or "@2101955".

This is the objects list I was able to extract from Horizons database:

Offline mcgyver

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Re: Spaceil Israeli Moon mission
« Reply #92 on: 03/01/2019 11:44 am »
First perige manuever performed successfully, to apogee of ~130000km :)
https://www.ynet.co.il/articles/0,7340,L-5471740,00.html
No changes detected in simulator file since 25/2 :-(
http://live.spaceil.com/data/data_s1.txt

Offline Bogeyman

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Re: Spaceil Israeli Moon mission
« Reply #93 on: 03/01/2019 11:50 am »
No changes detected in simulator file since 25/2 :-(
http://live.spaceil.com/data/data_s1.txt
I guess they don't maintain that page very well. Like the SpaceIL main website does not show any news at all...
The most reliable "official" source seems to be their twitter account.

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #94 on: 03/01/2019 01:22 pm »
 "Does anybody know if Beresheet data are also available on NASA Horizons?"
My opinion.
Beresheet is no NASA mision.
When mision end, NASA gives it to the database.

"Currently it does not:
NORAD ID: 44049 
Int'l Code: 2019-009B
...."
NORAD up date data cca 24-48 hour.
Beresheet last epoch
22.02.2019 05:28:01
22.02.2019 13:36:09
22.02.2019 13:38:52
23.02.2019 21:50:24
25.02.2019 02:52:48
26.02.2019 20:51:41
28.02.2019 10:01:36

When a new TLE comes out,
  satellite trackers are automatically updated
 
« Last Edit: 03/01/2019 01:39 pm by lamid »

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #95 on: 03/01/2019 01:53 pm »
I guess they don't maintain that page very well. Like the SpaceIL main website does not show any news at all...
The most reliable "official" source seems to be their twitter account.

I can imagine better information
Or none.
This gives more space for you more imagination.

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #96 on: 03/01/2019 02:34 pm »

NORAD ID: 44049 
Int'l Code: 2019-009B 
Perigee: 629.8 km 
Apogee: 69,035.6 km 

NORAD last data 28.02.2019 10:01:36:
44049    BERESHEET   2019-009B   PAYLOAD   ISRA   2019-02-22   AFETR      1387.28   27.66   69028   623   

Its OK.
Satelite trackers calculate apoge a perige from TLE NORAD and has diferent calcul.

Calsky.com
Name:          BERESHEET
Brightness:     5.0 mag (at 1000 km, 50% illuminated)
                3.2 mag (at perigee, full illumination)
USSPACECOM Nr: 44049  Internat. Designator: 2019-009B
Orbit:         623.4 x 69036 km, 23.12h  Inclination: 27.7°
Age Elements:   1.2 days

https://www.heavens-above.com/orbit.aspx?satid=44049
Dátum (UTC):   28. februára 2019 10:01:35
Excentricita:   0,8300930
sklon:   27,6559°
výška v perigeu:   622 km
výška v apogeu:   69028 km
rektascenzia vzostupného uhla:   10,1226°
argument v perigeu:   181,4837°
počet preletov za deň:   1,03800294
stredná odchýlka v priebehu preletu:   211,4679°
počet preletov celkom:   6

https://www.n2yo.com/satellite/?s=44049   
BERESHEET
NORAD ID: 44049 
Int'l Code: 2019-009B 
Perigee: 629.8 km 
Apogee: 69,035.6 km 
Inclination: 27.7 ° 
Period: 1,387.3 minutes 
Semi major axis: 41203 km 
RCS: Unknown 
Launch date: February 22, 2019
Source: Israel (ISRA)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)
« Last Edit: 03/01/2019 02:48 pm by lamid »

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #97 on: 03/01/2019 10:38 pm »
New TLE
1 44049U 19009B   19060.95833333 -.00001443  00000-0  00000+0 0  9995
2 44049  27.6156  10.0636 9003190 181.1468 153.0746  0.46390415    72
epoch 01.03.2019 22:59:59
648.17 x 127571.45 km 27.6156° P=+51:44:05.370=3 104,09 min

My calcul:
last perigeum
01.03.2019 01:00:07
and T+3*P=07.03.19 12:12
result:
PM2 Perigee maneuver 07.03.19 12:12

Note:
TLE will be specified further, which increases the precision of orbit period.


« Last Edit: 03/01/2019 11:41 pm by lamid »

Offline Comga

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Re: Spaceil Israeli Moon mission
« Reply #98 on: 03/02/2019 12:41 am »
From N2YO in their format:
BERESHEET

NORAD ID: 44049 
Int'l Code: 2019-009B 
Perigee: 655.3 km 
Apogee: 127,579.1 km 
Inclination: 27.6 ° 
Period: 3,104.1 minutes 
Semi major axis: 70488 km 
RCS: Unknown 
Launch date: February 22, 2019
Source: Israel (ISRA)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline lamid

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Re: Spaceil Israeli Moon mission
« Reply #99 on: 03/02/2019 07:55 am »
I added text to the image

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