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66459 (1999 RD4)
Classification: Main-belt Asteroid          SPK-ID: 2066459
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584983294663719 3.7228e-08  
a 2.744774696415594 1.6082e-08 au
q 2.309732492272154 1.0105e-07 au
i 9.316136210723835 4.5111e-06 deg
node 165.9592374409729 2.3244e-05 deg
peri 158.3156777994785 2.8477e-05 deg
M 247.9748130589198 2.0415e-05 deg
tp 2459717.358491226646
(2022-May-17.85849123)
9.688e-05 TDB
period 1660.95734291839
4.55
1.4598e-05
3.997e-08
d
yr
n .2167424717647842 1.9049e-09 deg/d
Q 3.179816900559033 1.8631e-08 au
  Orbit Determination Parameters
   # obs. used (total)      884  
   data-arc span      8372 days (22.92 yr)  
   first obs. used      1998-04-21  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57486  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:01:53  

Additional Information
 Earth MOID = 1.29911 au 
 Jupiter MOID = 2.19479 au 
 T_jup = 3.311 
[ 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 15.0   n/a MPO468591  

66459 (1999 RD4)          Discovered 1999-Sep-04 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RD4 = 1998 HV138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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