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385185 (1993 RO)
Classification: TransNeptunian Object          SPK-ID: 2385185
Ephemeris | Orbit Diagram | Orbital Elements | 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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1984022057421995 0.00019163  
a 39.18338221887507 0.011818 au
q 31.40931275821058 0.0019791 au
i 3.714185638398098 0.00016439 deg
node 170.2861538173021 0.0013134 deg
peri 187.7676803255544 0.020899 deg
M 33.76471013865043 0.028754 deg
tp 2450597.935928980633
(1997-May-29.43592898)
3.4176 TDB
period 89588.30249528328
245.28
40.531
0.111
d
yr
n .004018381752673052 1.818e-06 deg/d
Q 46.95745167953956 0.014163 au
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      9568 days (26.20 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .57804  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:21:59  

Additional Information
 Earth MOID = 30.4058 au 
 Jupiter MOID = 26.4469 au 
 T_jup = 5.501 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452713.5 (2003-Mar-15.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1958626913480006 0.00019293  
q 31.48554490336105 0.0019364 au
tp 2450810.731065389760
(1997-Dec-28.23106539)
3.2942 TDB
node 170.3385796248934 0.0013108 deg
peri 189.1044495325087 0.020028 deg
i 3.717125272222211 0.00016467 deg
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      9568 days (26.20 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .57804  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:21:59  

Additional Information
 Jupiter MOID = 26.4469 au 
 T_jup = 5.501 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.722078549375222E-8 3.704418120052699E-7 .0006055464336652362 5.186665682528742E-9 3.675359908928303E-6 1.157642619722343E-9
q 3.704418120052699E-7 3.749660580731921E-6 .006269294788716392 5.224739378024562E-8 3.804586960432542E-5 1.148336867505111E-8
tp .0006055464336652362 .006269294788716392 10.85199851141122 8.676748765730284E-5 .06583503664138349 1.86326893182703E-5
node 5.186665682528742E-9 5.224739378024562E-8 8.676748765730284E-5 1.718191837021494E-6 -1.187264817298731E-6 1.117933520412558E-7
peri 3.675359908928303E-6 3.804586960432542E-5 .06583503664138349 -1.187264817298731E-6 .0004011129285526082 1.70500802314805E-9
i 1.157642619722343E-9 1.148336867505111E-8 1.86326893182703E-5 1.117933520412558E-7 1.70500802314805E-9 2.711529830987143E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.4   n/a MPC41519  

385185 (1993 RO)          Discovered 1993-Sep-14 by Jewitt, D. C., Luu, J. X. at Mauna Kea
Reference: Last Updated: 2014-02-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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