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The space junk CZ-3B R/B is forecast to reentry Thursday, 04 Jul 2019 at 17:18 UTC +/- 8 hours
CZ-3B R/B

Forecast for CZ-3B R/B Reentry


Update Thu 27-Jun-2019 7:07 UTC

The map above shows the location of the possible reentry of the space junk CZ-3B R/B (43921U) predicted by modeling of orbital evolution until the fragment or satellite reaches the altitude of nominal burst.

According to the forecast made by Satview.org, the object's reentry will occur in Thursday, 04 Jul 2019 at 17:18 UTC, above the coordinates shown on map.

Satellite Launch Norad Incl.
degrees
Apogee
Km
Perigee
Km
Period
min
Options
IRIDIUM 61 [P]
Reentry: (YMD) 2019-06-29
199825263U8673919894Forecast
STARLINK U
Reentry: (YMD) 2019-07-4
201944253U5354153495Forecast
CZ-3B R/B
Reentry: (YMD) 2019-07-4
201943921U275438112145Forecast
CZ-3B R/B
Reentry: (YMD) 2019-07-8
201843604U554538102135Forecast
BANXING-2
Reentry: (YMD) 2019-07-21
201641834U4324222689Forecast
STARLINK AX
Reentry: (YMD) 2019-07-28
201944280U5355254996Forecast
NJUST-1
Reentry: (YMD) 2019-07-31
199842722U5226725990Forecast
STARLINK AV
Reentry: (YMD) 2019-08-5
201944278U5340239393Forecast
STARLINK BD
Reentry: (YMD) 2019-08-11
201944286U5355054696Forecast
CZ-3B R/B
Reentry: (YMD) 2019-08-15
201843583U557747105174Forecast
CZ-11 DEB
Reentry: (YMD) 2019-08-26
201944328U4557626693Forecast
DELTA 2 R/B(2) (PAM-D)
Reentry: (YMD) 2019-08-26
200832712U40105017597Forecast
SL-12 R/B(AUX MOTOR)
Reentry: (YMD) 2019-09-4
200833113U4719422108340Forecast
STARLINK X
Reentry: (YMD) 2019-09-26
201944256U5355054796Forecast
EPSILON R/B
Reentry: (YMD) 2019-10-1
201943939U9741720691Forecast
CZ-11 DEB
Reentry: (YMD) 2019-10-2
201944326U4561026693Forecast
CZ-11 DEB
Reentry: (YMD) 2019-10-28
201944327U4560126993Forecast
CZ-11 DEB
Reentry: (YMD) 2019-12-4
201944319U4562226993Forecast
CZ-11 DEB
Reentry: (YMD) 2019-12-8
201944320U4561226993Forecast
CZ-3B R/B
Reentry: (YMD) 2019-12-31
201741912U275511148147Forecast
STARLINK C
Reentry: (YMD) 2020-01-10
201944237U5355254996Forecast




The Satellite Path


The path to be followed by satellite (dotted line) does not change due to the fact that the satellite is falling and can be used to assess the trajectory of the object before and after possible fall. In the graph, each point marks the range of 1 minute.

Solar Flux and Other Variables


As much as the institutes and space agencies strive to provide correct data of the point where the space debris will fall, several factors may interfere with the accuracy of the prediction. Among the most important, the solar flux is the most critical because it determines the conditions of the upper atmosphere, increasing or decreasing the drag on the object.

Besides the solar flux acting on the aerodynamic characteristics, another variable rather difficult to be computed is the resistance of materials used in the construction of the object and the shape of the structure. Combined, these factors may determine different altitudes for the moment of rupture, causing errors of more than 30 km in altitude reentry provided.

Other variables that affect the calculation of reentry, although less important, are the gravitational perturbations of the Sun and Moon and also those exercised by large mountain ranges, above or below sea level.

The modeling used by Satview to compute the time of reentry uses solar flux data obtained at the time of modeling, and prediction of the behavior of the sun for the next 5 days. With this, the margin of error of prediction is + / - 3 revolutions for satellites or debris in uncontrolled reentry.

Altitude of Reentry


Spacecraft reentering the atmosphere without control usually break between 72 and 84 km altitude due to temperature and aerodynamic forces acting on the structure.

The nominal breakup altitude is 78 km, but big satellites that have larger and denser structures survive longer and break down at lower altitudes. Usually, solar panels are destroyed before any component, at altitudes between 90 and 95 km.

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