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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2234938074652534 3.5741e-08  
a 2.370530451620063 5.8702e-09 au
q 1.840731575275169 8.6617e-08 au
i 2.462701537891965 3.9243e-06 deg
node 19.5371487728078 7.7205e-05 deg
peri 5.522171910214295 7.7685e-05 deg
M 97.81339633489705 8.3236e-06 deg
tp 2458838.288217924379
(2019-Dec-20.78821792)
3.0398e-05 TDB
period 1333.11229783667
3.65
4.9519e-06
1.356e-08
d
yr
n .2700447671094146 1.0031e-09 deg/d
Q 2.900329327964958 7.1822e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1913  
   data-arc span      16047 days (43.93 yr)  
   first obs. used      1977-02-11  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4909  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:19:27  

Additional Information
 Earth MOID = .843414 au 
 Jupiter MOID = 2.55648 au 
 T_jup = 3.510 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457149.5 (2015-May-07.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2247061192228552 3.6033e-08  
q 1.837219318564983 8.7448e-08 au
tp 2457503.366144274274
(2016-Apr-24.86614427)
2.8706e-05 TDB
node 19.62834803768174 7.6955e-05 deg
peri 5.0437864383319 7.7429e-05 deg
i 2.469009481244761 3.9302e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1913  
   data-arc span      16047 days (43.93 yr)  
   first obs. used      1977-02-11  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4909  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:19:27  

Additional Information
 Jupiter MOID = 2.55648 au 
 T_jup = 3.510 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.298353171989686E-15 -3.147436325503067E-15 -4.393788830759173E-13 -3.43277185212046E-16 -1.321223106773275E-13 -5.769323991829193E-16
q -3.147436325503067E-15 7.647211299331453E-15 1.06518673994778E-12 4.927803995312126E-16 3.187782492444953E-13 1.424357966628306E-15
tp -4.393788830759173E-13 1.06518673994778E-12 8.240324450087494E-10 1.286092130393744E-13 2.554729007804485E-10 4.081675202182031E-14
node -3.43277185212046E-16 4.927803995312126E-16 1.286092130393744E-13 5.922012583174756E-9 -5.91562289226963E-9 -8.715021185119556E-11
peri -1.321223106773275E-13 3.187782492444953E-13 2.554729007804485E-10 -5.91562289226963E-9 5.995289975043518E-9 8.70846488927954E-11
i -5.769323991829193E-16 1.424357966628306E-15 4.081675202182031E-14 -8.715021185119556E-11 8.70846488927954E-11 1.544672679246931E-11

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. 2020-October); 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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