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- From: cecil@physics.unc.edu (Gerald Cecil)
- Subject: Re: Where are Pioneer and Voyager Headed?
- Message-ID: <1992Nov11.225206.7968@samba.oit.unc.edu>
- Sender: usenet@samba.oit.unc.edu
- Nntp-Posting-Host: wrath.physics.unc.edu
- Reply-To: cecil@physics.unc.edu
- Organization: University of North Carolina at Chapel Hill.
- References: <1992Nov11.123858.1@scivax.stsci.edu>
- Date: Wed, 11 Nov 1992 22:52:06 GMT
- Lines: 33
-
- In article 1@scivax.stsci.edu, mbobrowsky@scivax.stsci.edu () writes:
- >A student asked me what direction the Pioneer and
- >Voyager spacecraft are headed. I had no idea but
- >I said I'd try to find out. Does anyone have an
- >approximate RA and Dec for the asymptote of the
- >trajectories of any of the four spacecraft that
- >are beyond Pluto's orbit?
-
- The Starflight Handbook, p.6 quotes figures from
- Cesarone, Sergeyevsky, and Kerridge, ``Prospects for the
- Voyager Extra-Planetary and Interstellar Mission'', JBIS 37
- (March 1984), 99-116. Anyone have this handy?
-
- The Starflight book gives the following table:
- Pioneer 10 Pioneer 11 Voyager 1 Voyager 2
- Loss of Signal 1994/59 AU 1996/45 AU 2012/121 AU 2013/106 AU
- Departure Vel
- Asymptotic (AU/yr) 2.4 2.2 3.5 3.4
- Trajectory angle
- to Earth Orbit plane 2.9 12.6 35.5 -47.5
- (degs)
- Closest stellar 3.27 1.65 1.64 0.80
- approach (ly)
- Star Ross 248 AC +79 3888 AC +79 3888 Sirius
- yrs to reach 32,600 42,200 40,300 497,0000
-
- The Pioneer 11 & Voyager 1 trajectories look quite different, but they are
- both going in the general direction of AC +79... whose name gives the Dec
- at least.
- ---
- Gerald Cecil cecil@wrath.physics.unc.edu 919-962-7169
- Physics & Astronomy, U of North Carolina, Chapel Hill, NC 27599-3255 USA
-
-