A few notes for trajectory geeks. Seemed like a lower than previous parking orbit - 165 km at seco-1, 188 km at seco-2. Second stage should re-enter quickly.Second stage second cutoff at 34356 km/hr = 9849 m/s. Add 402 m/s for Earth rotation, so 10251 m/s. This is almost exactly what they need for a GTO apogee, so neither sub nor super synchronous.Last question is inclination. This payload was supposed to be about 3000 kg. The slightly heavier Bangabandhu (3700 kg) got down to a 19.3 degree inclination. This should do better. A quick guess shows reducing the mass from 3700 kg to 3000 kg should give an extra 80 m/s. With this, SpaceX should be able to reduce the inclination to 18.4 degrees.So final prediction 188 x 36000 km, inclined 18.4o, deficit 1640 m/s to GEO.
Screen cap of object being passed by descending first stage near 6 minute markDark dot over blue sky near limb on right.
A few seconds later you had a second object passing on the other side of the rocket. Barely visible.
SpaceX - Es"hail 2 - Launch And Track 11-15-2018USLaunchReportPublished on Nov 15, 2018https://www.youtube.com/watch?v=_-cWI2X8CTE?t=001
The fairings seen as the booster catches up and passes them? The screen captures posted by CraigLieb sure look like a fairing.
The satellite weighed around 11,700 pounds (5,300 kilograms) with its on-board propellants, according to Zoubair Kachri, Es’hailSat’s technical vice president.
Quote from: marsbase on 11/16/2018 01:45 amThe fairings seen as the booster catches up and passes them? The screen captures posted by CraigLieb sure look like a fairing.Seems unlikely. Fairings are jettisoned about a minute after stage separation. During that time the booster is already in free fall while the second stage carries the fairings downrange and accelerates them by an additional 1000 km/hr or so.
Quote from: LouScheffer on 11/15/2018 11:41 pmLast question is inclination. This payload was supposed to be about 3000 kg. The slightly heavier Bangabandhu (3700 kg) got down to a 19.3 degree inclination. This should do better. A quick guess shows reducing the mass from 3700 kg to 3000 kg should give an extra 80 m/s. With this, SpaceX should be able to reduce the inclination to 18.4 degrees.Spaceflight Now reported 5300kg mass. That's the only recent mention I've seen of the satellite mass.
Last question is inclination. This payload was supposed to be about 3000 kg. The slightly heavier Bangabandhu (3700 kg) got down to a 19.3 degree inclination. This should do better. A quick guess shows reducing the mass from 3700 kg to 3000 kg should give an extra 80 m/s. With this, SpaceX should be able to reduce the inclination to 18.4 degrees.
Two cataloged objects launched by this mission:2018-090A 2018-11-15 22:50 UTC - 201/37688km/25.02°2018-090B 2018-11-15 22:43 UTC - 194/37539km/24.99°
Rotation per request, tuned by different spring force.
From the updates thread:Quote from: Lillmalen on 11/16/2018 08:44 amRotation per request, tuned by different spring force.What would be the benefits for adding rotation to the satellite?
SpaceX drone video:https://www.instagram.com/p/BqQKH7KFh3h/
SpaceX Es'hail-2 Launch - UP CLOSE VIEWSAmericaSpacePublished on Nov 16, 2018https://youtube.com/watch?v=Hi8FzoQAweA
Anyone know what the object is by front left landing leg? Some new safing gadget? I do not remember seeing this before. Something to do with octograbber ops?
Was it normal for the rainbirds to go to full flow that late? (This can be seen in just about every shot shown in this video.) I know they don't go full flow during the engine startup sequence, but it seems like they ramped up to full flow about one second too late, based on plume impingment.
