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<title>Asteroid Fact Sheet</title>
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<h3>Asteroid Fact Sheet</h3>
<img src="../images/gaspara">The asteroid Gaspara

<h4>Information on Selected Asteroids</h4>

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   Asteroid         Diameter    ~Mass     Rotation    Orbital   Spectral   Semimajor      Orbital        Orbital      Number
Number and Name       (km)     10<sup>15</sup> kg      Period     Period     Class       Axis       Eccentricity   Inclination   and Name
---------------     --------   -------    --------    -------   --------   ---------    ------------   -----------   -------- 
   1 Ceres            974     1,000,000   9.078 hrs   4.60 yrs      C       2.767 AU        0.079        10.6 deg      1 Ceres
   2 Pallas           538       250,000   7.811 hrs   4.61 yrs      U       2.771 AU        0.235        34.8 deg      2 Pallas
   3 Juno             268        20,000   7.21  hrs   4.36 yrs      S       2.670 AU        0.256        13.0 deg      3 Juno
   4 Vesta            526       300,000   5.342 hrs   3.63 yrs      U       2.362 AU        0.088         7.1 deg      4 Vesta 
 243 Ida            58 x 23       100     4.633 hrs   4.84 yrs      S       2.862 AU        0.044         2.1 deg    243 Ida
 253 Mathilde     50 x 53 x 57    100   417.7   hrs   4.31 yrs      C       2.645 AU        0.266         6.7 deg    253 Mathilde                                  
 433 Eros         41 x 15 x 14      5     5.270 hrs   1.76 yrs      S       1.458 AU        0.223        10.8 deg    433 Eros
 951 Gaspra       19 x 12 x 11     10     7.042 hrs   3.29 yrs      S       2.210 AU        0.146         5.1 deg    951 Gaspra
1566 Icarus           1.4        0.001    2.273 hrs   1.12 yrs      U       1.078 AU        0.827        23.0 deg   1566 Icarus            
1620 Geographos       2.0        0.004    5.222 hrs   1.39 yrs      S       1.244 AU        0.335        13.3 deg   1620 Geographos 
1862 Apollo           1.6        0.002    3.063 hrs   1.81 yrs      S       1.486 AU        0.566         6.4 deg   1862 Apollo
2060 Chiron           180        4000     5.9   hrs   50.7 yrs      B      13.699 AU        0.383         6.9 deg   2060 Chiron
2530 Shipka                                           5.25 yrs              3.020 AU        0.123        10.1 deg   2530 Shipka
3352 McAuliffe       2 - 5                            2.57 yrs              1.878 AU        0.369         4.8 deg   3352 McAuliffe
3840 Mimistrobell                                     3.38 yrs              2.250 AU        0.082         3.9 deg   3840 Mimistrobell
4179 Toutatis   4.6 x 2.4 x 1.9  0.05     irregular   1.10 yrs      S       0.921 AU        0.634         0.5 deg   4179 Toutatis
4660 Nereus             2                             1.82 yrs              1.490 AU        0.360         1.4 deg   4660 Nereus
4769 Castalia      1.8 x 0.8     0.0005               0.41 yrs              0.550 AU        0.483         8.9 deg   4769 Castalia  
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<b>1 Ceres</b> - The largest and first discovered asteroid, by G. Piazzi on January 1, 1801.  Ceres 
comprises nearly half the 2.3 x 10<sup>21</sup> kg estimated total mass of all the asteroids.
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<b>2 Pallas</b> - The 2nd largest asteroid and second asteroid discovered, by H. Olbers in 1802.
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<b>3 Juno</b> - The 3rd asteroid discovered, by K. Harding in 1804.
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<b>4 Vesta</b> - The 3rd largest asteroid, Vesta appears to have a basaltic crust overlying 
an olivine mantle, indicating differentiation has occurred.  Imaged by the Hubble Space Telescope 
in 1995.
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<b>243 Ida</b> - Imaged by Galileo
on 28 August 1993.  These images showed a small satellite, 
subsequently named Dactyl, in orbit about Ida. 
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<b> 253 Mathilde</b> - Target of NEAR mission flyby on 27 June 1997 en route to 433 Eros. 
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<b>433 Eros</b> 
- Near-Earth asteroid scheduled to be studied by the NEAR
mission, which will be put into orbit about Eros in February 1999.
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<b>951 Gaspra</b> - Imaged by Galileo on 29 Oct 1991.
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<b>1566 Icarus</b> - Highly eccentric Earth-crossing orbit.
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<b>1620 Geographos</b> - Scheduled to be visited by Clementine
before a computer malfunction cut the mission short.
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<b>1862 Apollo</b> - Earth-crossing asteroid.
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<b>2060 Chiron</b>
- Asteroid/Comet (95P/Chiron) in chaotic eccentric orbit near 
Saturn and Uranus.  14 February 1996 perihelion was the subject 
of the Chiron Perihelion Campaign.
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<b>2530 Shipka</b> - Scheduled for October, 2008 flyby by the 
<a href="http://nssdc.gsfc.nasa.gov/cgi-bin/database/www-nmc?ROSETTA">Rosetta</a> 
spacecraft on its way to Comet P/Wirtanen
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<b>3352 McAuliffe</b> - Amor (Mars-crossing) asteroid scheduled for 1999 flyby by the 
<a href="http://nssdc.gsfc.nasa.gov/cgi-bin/database/www-nmc?NM-DS-1">New Millenium Deep Space-1</a> 
spacecraft.
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<b>3840 Mimistrobell</b> - Scheduled for September, 2006 flyby by the 
<a href="http://nssdc.gsfc.nasa.gov/cgi-bin/database/www-nmc?ROSETTA">Rosetta</a> 
spacecraft on its way to Comet P/Wirtanen.
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<b>4179 Toutatis</b>
- Double object, probably in contact, one 2.5 km and one 1.5 km diameter
(estimated), imaged by Arecibo and Goldstone radar.  Close approach to Earth of this object 
(about 1.5 million km) will occur on 29 September 2004. 
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<b>4660 Nereus</b> - Near-Earth asteroid, target of ISAS (Japan) 
<a href="http://nssdc.gsfc.nasa.gov/cgi-bin/database/www-nmc?MUSES-C">Muses-C</a> 
sample-return mission.
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<b>4769 Castalia</b> - Double-lobed near-Earth asteroid, each lobe about .75 km diameter. 
Imaged by Arecibo radar.
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