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4897 Tomhamilton (1987 QD6)
Classification: Main-belt Asteroid          SPK-ID: 2004897
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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.

Note: If the applet is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1219045868883555 3.0322e-08  
a 3.056199172719097 1.373e-08 au
q 2.683634475120241 9.2083e-08 au
i 11.05566401270672 4.37e-06 deg
node 188.4142265009043 1.6683e-05 deg
peri 107.0094808063373 2.4712e-05 deg
M 86.77168867594928 1.7248e-05 deg
tp 2458530.122590234168
9.3499e-05 TDB
period 1951.510568707359
n .1844724828922944 1.2431e-09 deg/d
Q 3.428763870317952 1.5403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2427  
   data-arc span      25554 days (69.96 yr)  
   first obs. used      1950-08-14  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4524  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:21:09  

Additional Information
 Earth MOID = 1.69486 au 
 Jupiter MOID = 1.87328 au 
 T_jup = 3.196 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1   n/a MPO502200  
diameter diameter 13.711 km 0.369 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.215   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4897 Tomhamilton           Discovered 1987 Aug. 22 by E. F. Helin at Palomar.
Thomas William Hamilton (b. 1939) determined radar and fuel requirements for the Apollo Project. Later he wrote shows (in a dozen languages and also for the deaf) for programmable planetaria, taught astronomy for 32 years and trained students to enter the planetarium field.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091004/MPCPages.arcLast Updated: 2009-10-06

[ show close-approach data ]
Alternate Designations
 1987 QD6 = 1971 QV1 = 1971 SB1 = 1990 BN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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