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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583284385500611 4.1178e-08  
a 2.745338272252814 1.8172e-08 au
q 2.310673150315304 1.0933e-07 au
i 9.315065571366915 4.6902e-06 deg
node 165.9581395531625 2.4833e-05 deg
peri 158.2609111991997 3.041e-05 deg
M 204.6908077693684 2.2143e-05 deg
tp 2459717.281658587118
(2022-May-17.78165859)
0.00010675 TDB
period 1661.468927790026
4.55
1.6496e-05
4.516e-08
d
yr
n .2166757343327797 2.1513e-09 deg/d
Q 3.180003394190325 2.1049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      798  
   data-arc span      7959 days (21.79 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58883  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 14:57:29  

Additional Information
 Earth MOID = 1.30198 au 
 Jupiter MOID = 2.19438 au 
 T_jup = 3.311 
[ 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 15.0   n/a MPO468591  

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

[ show close-approach data ]
Alternate Designations
 1999 RD4 = 1998 HV138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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