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Jonathan McDowell Profile picture
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25 Mar, 5 tweets, 1 min read
The Fregat stage should now have made its circularization burn and the first 4 satellite separations should happen soon
The first 4 sats released were OneWeb 0108, 0174, 0177, 0178. The second four satellites have now been released: 0155, 0163, 0166, 0171.
Satellites 0112, 0115, 0116 and 0158 should have been released at 0444 UTC, while I was distracted by North Korean missile geolocation. Satellites 0151, 0159, 0172 and 0173 will pop out at 0503 UTC, about 10 minutes from now
OneWeb sats 0113, 0150, 0152 and 0157 should separate from Fregat at 0522 UTC, and 0148, 0164, 0169, 0170 at 0541 UTC, 0107, 0149, 0153, 0156 at 0600 UTC, 0160, 0167, 0168, 0175 at 0620 UTC, and 0101, 0154, 0161 0162 at 0639 UTC, followed by Fregat deorbit to complete the mission
By the way this data is already in my GCAT planet4589.org/space/gcat/dat… even though some of the separations are still in the future... and the catalog numbers are pure guesswork at this stage. Caveat lector.

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More from @planet4589

Jonathan McDowell Profile picture
26 Mar
Some fun facts about space debris reentries:
(1) A breakup like the one over Seattle happens at about 60 km (~40 miles) up, far above where airplanes fly (more like 10 km).
(2) satellites (including space junk like this rocket stage) orbit the Earth at over 7.5 km/s (17000 mph).
3) We could predict this rocket stage would reenter today. But as of yesterday the TIME at which it would reenter was still uncertain by 5 hours.
Read 5 tweets
Jonathan McDowell Profile picture
25 Mar
LAUNCH of Starsem flight ST30, Soyuz-2-1b (Vostochniy) No V15000-005 with 36 OneWebs
The 4 side boosters, block B V G and D, have separated as the core stage A continues to fire
Blok A core stage separated, Blok I third stage now firing
Read 5 tweets
Jonathan McDowell Profile picture
23 Mar
Updated sumary: the J-SSOD-M2 deployer flew to ISS on NG-15, taken to the Kibo module and moved outside with the JEM-RMS robot arm. At 0830 UTC Mar 22 it ejected its payload, the လောကနတ်-၁ (Lawkanat-1) microsat which is a joint project of Hokkaido U and MAEU (Meiktila, Myanmar)
A Reuters story by @kellyJapan noted the controversy over the sat. The report today by @heinkoLwin confirms the deployment and says that Lawkanat-2 is scheduled for Sep 2023.
@kellyJapan @heinkoLwin The announcement republished by Lwin says " Under the terms of the agreement, the Earth observation satellite is intended for the following non-military peaceful uses: They are:
(1) Agriculture;
(2) Forests;
(3) Rural areas; Urban change;
(4) Oceanography;
(cont)
Read 7 tweets
Jonathan McDowell Profile picture
23 Mar
Electron 19's Stage 2 has been cataloged as 47965, 2021-023A, in a 297 x 557 km x 45.0 deg orbit.
The payloads on Electron 19 are:
A Black Sky Global satellite (possibly Global-5?), about 55 kg, separated at 0019 UTC Mar 23;
RAAF's M2 A and B, two 6U sats deployed at 2322 UTC Mar 22; Fleet's Centauri 3, a 6U built by Tyvak, deployed 2323 UTC; (1/2)...
Care Weather's Veery Hatchling, a 1U deployed at 2324 UTC; one of the US Army SMDC's Gunsmoke-J series (J2?) deployed at 2324 UTC; and Myriota's Myriota 7, deployed at 2325 UTC.
Read 6 tweets
Jonathan McDowell Profile picture
23 Nov 20
The Chang'e-5 lunar sample return mission is pretty complicated. The spacecraft has a lot of sub-pieces and the mission has a lot of phases. I am going to take a deep breath and summarize what I believe the scenario to be.
First, the Lego pieces (abbreviations are mine):
SM: Service module
DS: Descent stage (lander)
AS: Ascent stage
AD: Adapter
DA: Docking adapter
RV: Reentry vehicle
At launch, the stack has the AS on top of the DS on top of the AD on top of the SM, wit the DA on top of the RV sitting on the SM inside the AD.
Read 10 tweets
Jonathan McDowell Profile picture
23 Nov 20
Chang'e-5 will launch aboard the Chang Zheng (Long March) 5 serial number Y5 from pad 101 at the Wenchang space centre on Hainan island. The CZ-5 rocket has 4 liquid side boosters, core stage, and upper stage. The upper stage will go to parking orbit and then translunar insertion
The CE-5 will separate from the CZ-5 second stage on its translunar trajectory, and coast on to lunar orbit insertion in a few days.
After some time in lunar orbit, the lander will separate from the service module and touch down. The lander ascent stage will then take off with its sample and dock with the service module in lunar orbit, transferring its samples.
Read 4 tweets

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