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JPL Small-Body Database Browser
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59813 (1999 RU18)
Classification: Main-belt Asteroid          SPK-ID: 2059813
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1897840699079294 4.6271e-08  
a 2.152853615784204 5.4401e-09 au
q 1.744276294664676 9.9275e-08 au
i 1.115884119992445 4.4012e-06 deg
node 248.6075159760291 0.00021581 deg
peri 129.7596602682261 0.00021608 deg
M 181.2898114688996 9.2558e-06 deg
tp 2459573.252495712216
(2021-Dec-24.75249571)
2.9853e-05 TDB
period 1153.77248578368
3.16
4.3732e-06
1.197e-08
d
yr
n .3120199211159696 1.1827e-09 deg/d
Q 2.561430936903732 6.4725e-09 au
  Orbit Determination Parameters
   # obs. used (total)      842  
   data-arc span      23477 days (64.28 yr)  
   first obs. used      1955-10-25  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52422  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:55:02  

Additional Information
 Earth MOID = .746506 au 
 Jupiter MOID = 2.90191 au 
 T_jup = 3.680 
[ 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 16.6   n/a MPO296572  

59813 (1999 RU18)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RU18 = 1977 UD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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