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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1992623135783253 0.00049131  
a 39.23429562554124 0.029303 au
q 31.41637910757992 0.0042074 au
i 3.714287765316566 0.00025677 deg
node 170.2864632331305 0.001364 deg
peri 187.799151636607 0.026678 deg
M 33.67831159846274 0.053699 deg
tp 2450603.096397695330
(1997-Jun-03.59639770)
4.3555 TDB
period 89762.97068786756
245.76
100.56
0.2753
d
yr
n .004010562453997057 4.4931e-06 deg/d
Q 47.05221214350256 0.035142 au
  Orbit Determination Parameters
   # obs. used (total)      20  
   data-arc span      6997 days (19.16 yr)  
   first obs. used      1994-08-10  
   last obs. used      2013-10-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .53143  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 22:46:02  

Additional Information
 Earth MOID = 30.4129 au 
 Jupiter MOID = 26.454 au 
 T_jup = 5.503 
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Orbital Elements at Epoch 2451378.5 (1999-Jul-19.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2060404076350862 0.00049457  
q 31.49134409182523 0.0041636 au
tp 2450786.535468488069
(1997-Dec-04.03546849)
3.8783 TDB
node 170.2823714471897 0.0013664 deg
peri 188.9821989747032 0.023722 deg
i 3.705413270231546 0.00025632 deg
  Orbit Determination Parameters
   # obs. used (total)      20  
   data-arc span      6997 days (19.16 yr)  
   first obs. used      1994-08-10  
   last obs. used      2013-10-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .53143  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 22:46:02  

Additional Information
 Jupiter MOID = 26.454 au 
 T_jup = 5.503 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.446000504233468E-7 2.049006606798815E-6 .001610417830225511 3.160890845022921E-8 9.859378120223851E-6 7.814541424900757E-9
q 2.049006606798815E-6 1.733520020428097E-5 .01433783315027711 2.671207894243591E-7 8.773584911778735E-5 6.541254915602028E-8
tp .001610417830225511 .01433783315027711 15.04113906511159 .0002196849476385825 .09184834269974444 5.104865290274361E-5
node 3.160890845022921E-8 2.671207894243591E-7 .0002196849476385825 1.866936655234331E-6 -5.14558898135108E-7 1.846271270181935E-7
peri 9.859378120223851E-6 8.773584911778735E-5 .09184834269974444 -5.14558898135108E-7 .0005627388458129817 1.293242010048448E-7
i 7.814541424900757E-9 6.541254915602028E-8 5.104865290274361E-5 1.846271270181935E-7 1.293242010048448E-7 6.56987055119837E-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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