The output to this program lists (1) planet name,
 (2) semi-major axis (i.e., time-averaged mean
 distance to Sun), (3) impact speed caused by
 revolution (calculated at Perihelion and Aphelion),
 (4) impact speed caused by gravity (calculated at
 Perihelion and Aphelion), (5) minumum impact speed
 (gravity minus revolution speed at Perihelion and
 Aphelion), and (6) maximum impact speed (sum of
 revolution and gravity-induced speeds at Perihelion
 and Aphelion).  All speeds are in km/sec.  The
 distance to the Sun is given in Astronomical Units
 (AU; 1 AU = 1.495E11 m).  The last table is a
 summary of minimum and maximum impact speeds and
 includes escape velocity and time-averaged mean
 revolution speeds for each planet.
  
 PERIHELION:
  
  PLANET    R(AU)  REV(KM/S)  GRAV(KM/S)  MIN(KM/S)  MAX(KM/S)
 -------------------------------------------------------------
MERCURY      0.39     59.1      76.2        17.1      135.2
VENUS        0.72     35.3      50.8        15.5       86.1
EARTH        1.00     30.3      44.0        13.7       74.3
MARS         1.52     26.5      36.2         9.7       62.7
JUPITER      5.20     13.7      62.6        48.9       76.3
SATURN       9.54     10.2      38.2        28.0       48.4
URANUS      19.18      7.1      23.5        16.3       30.6
NEPTUNE     30.06      5.5      24.7        19.2       30.2
PLUTO       39.53      6.1       7.8         1.7       13.9
  
 APHELION:
  
  PLANET    R(AU)  REV(KM/S)  GRAV(KM/S)  MIN(KM/S)  MAX(KM/S)
 -------------------------------------------------------------
MERCURY      0.39     38.9      61.9        23.0      100.7
VENUS        0.72     34.8      50.5        15.7       85.3
EARTH        1.00     29.3      43.3        14.0       72.6
MARS         1.52     22.0      33.1        11.1       55.1
JUPITER      5.20     12.5      62.3        49.9       74.8
SATURN       9.54      9.1      37.9        28.8       47.0
URANUS      19.18      6.5      23.3        16.8       29.8
NEPTUNE     30.06      5.4      24.7        19.3       30.1
PLUTO       39.53      3.7       6.1         2.4        9.8
  
 SUMMARY (REV is average revolution speed and VESC
 is planetary escape velocity):
  
  PLANET    R(AU)  REV(KM/S)  VESC(KM/S)  MIN(KM/S)  MAX(KM/S)
 -------------------------------------------------------------
MERCURY      0.39     47.9       4.3        17.1      135.2
VENUS        0.72     35.1      10.4        15.5       86.1
EARTH        1.00     29.8      11.2        13.7       74.3
MARS         1.52     24.1       5.0         9.7       62.7
JUPITER      5.20     13.1      59.7        48.9       76.3
SATURN       9.54      9.7      35.5        28.0       48.4
URANUS      19.18      6.8      21.3        16.3       30.6
NEPTUNE     30.06      5.4      23.5        19.2       30.2
PLUTO       39.53      4.7       1.2         1.7       13.9
  
 (NOTE: The calculated comet (asteroid, etc.)
 impact speeds for each planet in these tables
 include gravitational perturbations from the
 other eight planets.)