<p>Assuming an object with the same density as earth (not very good approximation) then a spherical object with a radius of 2.5 km, would have an escape velocity of about 96 mph. A velocity reached by several MLB pitchers. There are probably several asteroids with a radius near this.</p>

CC BY-SA 4.0
2020-02-22T00:34:05.337Z
`+1` but you can choose about half that density to make this even more useful! See  [Are there any known asteroids with average density similar to that of Earth's?](https://astronomy.stackexchange.com/q/27930/7982) and [this table](https://astronomy.stackexchange.com/questions/35167/largest-body-in-the-solar-system-that-a-baseball-thrown-by-a-professional-pitche#comment67914_35169)
uhoh
CC BY-SA 4.0
2020-02-21T17:18:28.280Z
2020-02-21T17:18:28.280Z
Natsfan
<p><a href="https://i.sstatic.net/brLt1.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/brLt1.png" alt="enter image description here"></a>
<a href="https://lynceans.org/tag/jaxa/" rel="nofollow noreferrer">source</a></p>

<p>I don't think this is complete - there may be objects between Phobos and Vesta.  Phobos and Vesta have too little mass to be rounded under their own gravity, so the escape velocity may depend on where you are standing.</p>

CC BY-SA 4.0
2020-02-21T02:23:11.763Z
"I don't think this is complete - there may be objects between Phobos and Vesta" is a bit of an understatement! This is a hard question to answer; unless someone happens to know where to find complete tables with estimated masses and sizes it will require a lot of work to hunt those down. However such a big hole between 25 and 800 MPH I don't think this addresses the OP's question "What is the largest known body in the solar system..." very well.
uhoh
CC BY-SA 4.0
2020-02-21T03:10:49.130Z
@uhoh [List of Solar System objects by size](https://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size), but there are large uncertainties for the masses.
Keith McClary
CC BY-SA 4.0
2020-02-21T03:14:56.717Z
Given a choice between doing what I'm supposed to be doing today and playing with a table of numbers for hours, I'm always going to go for the latter. Thanks!
uhoh
CC BY-SA 4.0
2020-02-21T01:51:59.233Z
2020-02-21T01:51:59.233Z
Keith McClary
<p>What is the largest (most massive) known body in the solar system that a professional pitcher could throw a baseball off of, i.e. that has an escape velocity lower than <a href="https://bleacherreport.com/articles/671695-aroldis-chapman-and-the-15-fastest-pitches-ever-recorded" rel="nofollow noreferrer">~102 MPH</a>? (45.33 m/s)</p>

<solar-system><gravity><escape-velocity>
Largest body in the solar system that a baseball thrown by a professional pitcher could escape
Keith Pinson
# Largest body in the solar system that a baseball thrown by a professional pitcher could escape

(Asked by: username_0 on 2020-02-21)

What is the largest (most massive) known body in the solar system that a professional pitcher could throw a baseball off of, i.e. that has an escape velocity lower than [~102 MPH](https://bleacherreport.com/articles/671695-aroldis-chapman-and-the-15-fastest-pitches-ever-recorded)? (45.33 m/s)

**Tags:** solar-system, gravity, escape-velocity


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## 2 answers

### Answer by username_1 on 2020-02-21. Score: 4

Assuming an object with the same density as earth (not very good approximation) then a spherical object with a radius of 2.5 km, would have an escape velocity of about 96 mph. A velocity reached by several MLB pitchers. There are probably several asteroids with a radius near this.

> **Comments:**
> **username_2**: `+1` but you can choose about half that density to make this even more useful! See  [Are there any known asteroids with average density similar to that of Earth's?](https://astronomy.stackexchange.com/q/27930/7982) and [this table](https://astronomy.stackexchange.com/questions/35167/largest-body-in-the-solar-system-that-a-baseball-thrown-by-a-professional-pitche#comment67914_35169)  

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### Answer by username_3 on 2020-02-21. Score: 1

[![enter image description here](https://i.sstatic.net/brLt1.png)](https://i.sstatic.net/brLt1.png)
[source](https://lynceans.org/tag/jaxa/)

I don't think this is complete - there may be objects between Phobos and Vesta. Phobos and Vesta have too little mass to be rounded under their own gravity, so the escape velocity may depend on where you are standing.

> **Comments:**
> **username_2**: "I don't think this is complete - there may be objects between Phobos and Vesta" is a bit of an understatement! This is a hard question to answer; unless someone happens to know where to find complete tables with estimated masses and sizes it will require a lot of work to hunt those down. However such a big hole between 25 and 800 MPH I don't think this addresses the OP's question "What is the largest known body in the solar system..." very well.  
> **username_3**: @username_2 [List of Solar System objects by size](https://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size), but there are large uncertainties for the masses.  
> **username_2**: Given a choice between doing what I'm supposed to be doing today and playing with a table of numbers for hours, I'm always going to go for the latter. Thanks!  

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