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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217920378846887 2.8635e-08  
a 3.056989231986759 1.2997e-08 au
q 2.684672283631542 8.5449e-08 au
i 11.05449444831438 3.6376e-06 deg
node 188.4084878772147 1.5816e-05 deg
peri 107.129302921197 2.184e-05 deg
M 123.5459828095066 1.5217e-05 deg
tp 2458530.514477771118
(2019-Feb-16.01447777)
8.168e-05 TDB
period 1952.267346274558
5.35
1.245e-05
3.409e-08
d
yr
n .1844009739173147 1.176e-09 deg/d
Q 3.429306180341976 1.458e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      25725 days (70.43 yr)  
   first obs. used      1950-08-14  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:21:05  

Additional Information
 Earth MOID = 1.69396 au 
 Jupiter MOID = 1.87224 au 
 T_jup = 3.195 
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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 12.12   n/a E2021B10  
diameter diameter 13.711 km 0.369 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.215   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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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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