If I were to launch a CubeSat, how long would it last before falling out of orbit and burning up in the atmosphere?

  • 7
    $\begingroup$ I disagree with the close votes. The cited close reason is Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise.. That's not the case at all, one could in theory provide statistics for every single CubeSat mission duration length ever carried out. $\endgroup$
    – gerrit
    Commented Jul 18, 2013 at 18:48
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    $\begingroup$ @gerrit: Maybe people are mixing it up with the operational life-time in general (electronics etc). However, the OP is asking for orbital decay, which is a fair technical question. Keep it open! $\endgroup$
    – s-m-e
    Commented Jul 19, 2013 at 11:32

2 Answers 2


gerrit is right, the most important restricting factor for the life-time in orbit is the orbit of the launcher. But I think a few details could be useful, anyway ...

Although cubesats are fairly similar (well, cubes), there are a few differences. There are 1, 2, 3, 6 and 12U cubesats. Besides, a lot of projects do not care about the weight restriction (one kg per one U) anymore, so there are plenty of over-weight (and some under-weight) cubesats in space. Some cubesats have deployable solar arrays, a lot have (different types of) deployable antennas. All of those factors account for differences in orbital decay. However, fundamentally, the decay still depends on the altitude (perigee and apogee) of the orbit.

A few numbers for circular orbits and 1U cubesats: ~1 year @ 450 km, 25 years @ 640 km (maximum allowed life time in or below geosynchronous orbit for every satellite launched in 2008 or later - IADC).

An interesting paper by AGI: An Evaluation of CubeSat Orbital Decay, 2011.

(Feel free edit in a graph, which is not copyright-protected - cant find anyone.)

  • $\begingroup$ So if the cubesat is launched from ISS, considering the avg altitude of ISS is 400 km, the approximate lifetime of the cubesat will be around 1 year? $\endgroup$ Commented Apr 14, 2015 at 2:15
  • $\begingroup$ Yes, a little over a year. E.g. ukamsat.files.wordpress.com/2013/03/… $\endgroup$
    – s-m-e
    Commented Apr 15, 2015 at 9:59
  • $\begingroup$ The linked paper is 404'ing, this seems to be the same paper, but not sure if it's a kosher link : digitalcommons.usu.edu/cgi/… $\endgroup$ Commented Nov 26, 2018 at 0:36
  • $\begingroup$ @SimeonPilgrim Looks pretty legit ... Thanks for noticing, I updated the link in the answer. $\endgroup$
    – s-m-e
    Commented Nov 26, 2018 at 7:20
  • $\begingroup$ Cool paper! Inspired by it, I've just asked Cubesat density (kg/U) statistics? $\endgroup$
    – uhoh
    Commented Nov 26, 2018 at 7:52

That depends very much on the launch you're piggybacking with.

When you launch a CubeSat, you're entirely at the whim of the launch you're piggybacking on. CubeSats usually don't have propulsion so if it's a low orbit, it may take only weeks before you burn up in the atmosphere. At a slightly higher orbit it may be a couple of months. As most CubeSats are for technology demonstration or as student projects, this is entirely sufficient. But there is no generic answer that applies to all CubeSats.


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