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From: steve@jplgodo.UUCP (Steve Schlaifer x3171 156/224)
Newsgroups: net.astro.expert
Subject: Re: Pluto surface gravity?
Message-ID: <554@jplgodo.UUCP>
Date: Mon, 27-Jan-86 18:02:09 EST
Article-I.D.: jplgodo.554
Posted: Mon Jan 27 18:02:09 1986
Date-Received: Thu, 30-Jan-86 05:59:45 EST
References: <19300002@inmet.UUCP>
Organization: Jet Propulsion Labs, Pasadena, CA
Lines: 28

> 
> Does anyone have a reasonable estimate of the surface gravity of Pluto?
> 
> It would be most useful relative to Earth = 1.0.
> 
> Any reasonable estimate would be greatly appreciated.
> 
> 
> Len Tower
> 
> UUCP:       {bellcore,ima,ihnp4}!inmet!tower
> INTERNET:   ima!inmet!tower@CCA-UNIX.ARPA

Using values given in "Numerical Values of the Constants of the Joint Report
of the Working Groups of IAU Commission 4" by P. K. Seidelmann (USNO,
Washington D. C.) of September 1976, the gravity on the surface of Pluto is
about .722 that on the surface of the Earth.  Note that the values for Pluto
used for radius and mass lead to a planet whose density is about 10 g cm-3
which is greater than that for any other planet.  Earth is about 5 g cm-3 as
I recall.  The radius of Pluto given is 2500 km, Earth is 6378.14 km.  The 
mass of Pluto is 1/3000000 solar masses, for Earth it is 1/332946.  Hope this
helps,

...smeagol\			Steve Schlaifer
......wlbr->!jplgodo!steve	Advance Projects Group, Jet Propulsion Labs
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