<p>I am exploring the outcome of a problem assigned in a quantum mechanics homework where the mass of of some beam of "something" is insignificant to the result. So much so that something weighing approximately <span class="math-container">$1.2285 * 10^{17} kg$</span> would be needed to make a difference in respect to the problem. (that is, assuming I've solved the problem correctly). </p>

<p>I have been googling for quite a bit and I can't find anything that is in the <span class="math-container">$10^{17} kg$</span> range. Does anything come to mind?</p>

<p>(I can't seem to find any good tags for this question)..</p>

CC BY-SA 4.0
2018-10-20T03:25:20.650Z
A few [asteroids and planetary satellites](https://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size#From_20_to_50_km) are in that ballpark.
Mike G
CC BY-SA 4.0
2018-10-20T03:53:10.573Z
@MikeG that works! I chose Prometheus, a moon of Saturn. If you would like, post it/that link as answer and I will accept it. Though, this question honestly does not provide much to the site. I might delete it instead.
KDecker
CC BY-SA 4.0
2018-10-20T06:26:33.300Z
Thats a diameter question. 1m3 rock is 5 tons - 5000kg. 1km3 is 5bn kg.
bandybabboon
<quantum-mechanics>
Looking for a celestial body that weights ~$10^{17} kg$?
KDecker
# Looking for a celestial body that weights ~$10^{17} kg$?

(Asked by: username_0 on 2018-10-20)

I am exploring the outcome of a problem assigned in a quantum mechanics homework where the mass of of some beam of "something" is insignificant to the result. So much so that something weighing approximately $1.2285 \* 10^{17} kg$ would be needed to make a difference in respect to the problem. (that is, assuming I've solved the problem correctly).

I have been googling for quite a bit and I can't find anything that is in the $10^{17} kg$ range. Does anything come to mind?

(I can't seem to find any good tags for this question)..

**Tags:** quantum-mechanics

> **Comments:**
> **username_1**: A few [asteroids and planetary satellites](https://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size#From_20_to_50_km) are in that ballpark.  
> **username_0**: @username_1 that works! I chose Prometheus, a moon of Saturn. If you would like, post it/that link as answer and I will accept it. Though, this question honestly does not provide much to the site. I might delete it instead.  
> **username_2**: Thats a diameter question. 1m3 rock is 5 tons - 5000kg. 1km3 is 5bn kg.  

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