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189458 (1999 RO31)
Classification: Main-belt Asteroid          SPK-ID: 2189458
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1761480804667281 6.6002e-08  
a 2.768998780158763 2.3863e-08 au
q 2.281244960219086 1.7639e-07 au
i 6.057360863850746 5.3038e-06 deg
node 121.9207815611296 5.0676e-05 deg
peri 240.1563110982291 5.2485e-05 deg
M 209.2413724279498 1.6686e-05 deg
tp 2459905.294080699255
(2022-Nov-21.79408070)
8.3507e-05 TDB
period 1682.994022550861
4.61
2.1756e-05
5.956e-08
d
yr
n .2139045030322563 2.7651e-09 deg/d
Q 3.256752600098441 2.8066e-08 au
  Orbit Determination Parameters
   # obs. used (total)      332  
   data-arc span      9836 days (26.93 yr)  
   first obs. used      1993-04-19  
   last obs. used      2020-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53338  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:03:38  

Additional Information
 Earth MOID = 1.28383 au 
 Jupiter MOID = 2.21278 au 
 T_jup = 3.307 
[ 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 16.09   n/a E2021B55  

189458 (1999 RO31)          Discovered 1999-Sep-04 by Sarounova, L. at Ondrejov
Reference: 20080819/Numbers.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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