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JPL Small-Body Database Browser
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4659 Roddenberry (1981 EP20)
Classification: Main-belt Asteroid          SPK-ID: 2004659
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2233836763616927 3.7037e-08  
a 2.370381891034107 6.0836e-09 au
q 1.840877269833727 8.9944e-08 au
i 2.46264759376399 4.0704e-06 deg
node 19.54328646981264 7.8121e-05 deg
peri 5.511751733490956 7.8629e-05 deg
M 43.81887812853064 8.3466e-06 deg
tp 2458838.250016473625
(2019-Dec-20.75001647)
3.0742e-05 TDB
period 1332.986981048793
3.65
5.1316e-06
1.405e-08
d
yr
n .2700701545612639 1.0397e-09 deg/d
Q 2.899886512234487 7.4425e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1785  
   data-arc span      15697 days (42.98 yr)  
   first obs. used      1977-02-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49171  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:18:30  

Additional Information
 Earth MOID = .844825 au 
 Jupiter MOID = 2.55576 au 
 T_jup = 3.510 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO395042  
diameter diameter 3.622 km 0.601 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]
geometric albedo albedo 0.193   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4659 Roddenberry (1981 EP20)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EP20 = 1979 SY7 = 1979 TO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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