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The space junk CZ-7 R/B is forecast to reentry Friday, 29 Jul 2016 at 02:44 UTC +/- 8 hours
CZ-7 R/B

Forecast of Reentry Location


Update Mon 25-Jul-2016 18:10 UTC

The map above shows the location of the possible reentry of the space junk CZ-7 R/B (41628U) 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 Friday, 29 Jul 2016 at 02:44 UTC, above the coordinates shown on map.

Satellite Launch Norad Incl.
degrees
Apogee
Km
Perigee
Km
Period
min
Options
CZ-2C R/B
Reentry: (YMD) 2016-06-27
201239000U97º12210487Reentered!
Lat=33   Lon=209
CZ-3B R/B
Reentry: (YMD) 2016-07-3
201541035U18º58010091Reentered!
Lat=17   Lon=81
CZ-3B R/B
Reentry: (YMD) 2016-07-4
201641239U26º5009290Reentered!
Lat=25.9   Lon=223.3
SL-4 R/B
Reentry: (YMD) 2016-07-10
201641640U52º16715888Reentered!
Lat=52   Lon=28
FLOCK 1E-7
Reentry: (YMD) 2016-07-16
199840726U52º18417488Reentered!
Lat=-15.5   Lon=160.7
FLOCK 1E-6
Reentry: (YMD) 2016-07-20
199840729U52º13311687Reentered!
Lat=43   Lon=17.4
DRAGON CRS-9 DEB
Reentry: (YMD) 2016-07-22
201641673U52º17014688Reentered!
Forecast
DRAGON CRS-9 DEB
Reentry: (YMD) 2016-07-22
201641674U52º18715888Reentered!
Forecast
CZ-7 R/B
Reentry: (YMD) 2016-07-29
201641628U41º23417789Forecast
FLOCK 1E-14
Reentry: (YMD) 2016-07-31
199840741U52º23222989Forecast
FLOCK 1E-12
Reentry: (YMD) 2016-08-13
199840739U52º25825290Forecast
FLOCK 2B-6
Reentry: (YMD) 2016-08-26
199840955U52º28828390Forecast
FLOCK 1E-11
Reentry: (YMD) 2016-08-26
199840738U52º26726390Forecast
AL-1 (AOLONG 1)
Reentry: (YMD) 2016-08-26
201641629U41º33119590Forecast
FLOCK 1E-10
Reentry: (YMD) 2016-08-28
199840737U52º27326690Forecast
TIANGE 2
Reentry: (YMD) 2016-08-29
201641637U41º27126190Forecast
TIANGE 1
Reentry: (YMD) 2016-08-31
201641636U41º27126290Forecast
YZ-1A DEB
Reentry: (YMD) 2016-09-10
201641626U41º33919690Forecast
FLOCK 2B-14
Reentry: (YMD) 2016-09-16
199840980U52º30529691Forecast
FLOCK 1E-13
Reentry: (YMD) 2016-09-16
199840740U52º28528290Forecast
GOMX 3
Reentry: (YMD) 2016-09-18
199840949U52º32231691Forecast
ARIANE 44L R/B
Reentry: (YMD) 2016-09-24
199020874U5553136147Forecast
FLOCK 2B-7
Reentry: (YMD) 2016-09-26
199840956U52º31030091Forecast
FLOCK 2B-5
Reentry: (YMD) 2016-10-1
199840954U52º31530691Forecast
FLOCK 2B-1
Reentry: (YMD) 2016-10-2
199840950U52º31330491Forecast
FLOCK 2B-2
Reentry: (YMD) 2016-10-8
199840951U52º31731091Forecast
DELTA 2 R/B(2) (PAM-D)
Reentry: (YMD) 2016-10-9
200327706U39º109917997Forecast
SL-4 R/B
Reentry: (YMD) 2016-10-13
201641387U97º34925791Forecast
AX-1 (AOXIANG ZHIXING)
Reentry: (YMD) 2016-10-24
201641625U41º35828091Forecast
SL-6 R/B(2)
Reentry: (YMD) 2016-10-25
199724963U62º5076113141Forecast
FLOCK 2B-13
Reentry: (YMD) 2016-10-27
199840979U52º32831891Forecast
FLOCK 2B-10
Reentry: (YMD) 2016-10-27
199840962U52º32331491Forecast
FLOCK 2B-3
Reentry: (YMD) 2016-10-28
199840952U52º32331691Forecast
FLOCK 2B-9
Reentry: (YMD) 2016-11-1
199840963U52º32731891Forecast
FLOCK 2B-4
Reentry: (YMD) 2016-11-10
199840953U52º32632091Forecast
AVUM R/B
Reentry: (YMD) 2016-11-17
201238086U69º45122691Forecast
CZ-4B R/B
Reentry: (YMD) 2016-12-14
201641559U97º46926092Forecast
LEMUR-2-CUBECHEESE
Reentry: (YMD) 2016-12-22
201641598U52º38938392Forecast
S-CUBE
Reentry: (YMD) 2016-12-28
199840898U52º33933091Forecast
ARIANE 5 R/B
Reentry: (YMD) 2017-01-9
200935497U14763124270Forecast
CADRE
Reentry: (YMD) 2017-01-14
199841475U52º38938492Forecast
LEMUR-2-DRMUZZ
Reentry: (YMD) 2017-01-14
201641596U52º38838392Forecast




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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