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30785 Greeley (1988 PX)
Classification: Mars-crossing Asteroid          SPK-ID: 2030785
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2454800.5 (2008-Nov-30.0) TDB
Reference: MPO62193 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.3446896 n/a  
a 2.2010482 n/a AU
q 1.4423698 n/a AU
i 5.40357 n/a deg
node 13.47416 n/a deg
peri 308.85780 n/a deg
M 78.19140 n/a deg
tp 2454541.4406644
(2008-Mar-15.94066440)		 n/a JED
period 1192.7316919
3.27		 n/a
n/a		 d
yr
n 0.30182815 n/a deg/d
Q 2.9597266 n/a AU
   Orbit Determination Parameters
   # obs. used (total)      50  
   first obs. used      1988-??-??  
   last obs. used      2004-04-22  
   # oppositions      4  
   planetary ephem.      DE403  
   quality code      1  
   fit RMS      0.63  
   data source      MPC:mpn  
   producer      MPC  

Additional Information
 T_jup = 3.580 

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3 mag n/a PDS3 (MPO 18538)  

30785 Greeley           Discovered 1988 Aug. 13 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Ronald Greeley (b. 1939) has been involved in lunar and planetary studies since 1967. His current research focuses on understanding planetary surface processes and geological histories and involves a combination of spacecraft data analysis, laboratory experiments and geological field studies on the earth.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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