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118278 (1998 RO17)
Classification: Main-belt Asteroid          SPK-ID: 2118278
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805551073728094 4.2042e-08  
a 2.226237975140997 7.5106e-09 au
q 1.824279338501988 9.4751e-08 au
i 2.289808163290129 3.5268e-06 deg
node 280.257334601392 0.00010886 deg
peri 86.45345396505337 0.00010928 deg
M 174.8142469421927 9.7871e-06 deg
tp 2458411.344237558614
(2018-Oct-19.84423756)
3.2204e-05 TDB
period 1213.26538419397
3.32
6.1397e-06
1.681e-08
d
yr
n .2967199136231561 1.5015e-09 deg/d
Q 2.628196611780005 8.8666e-09 au
  Orbit Determination Parameters
   # obs. used (total)      710  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:39  

Additional Information
 Earth MOID = .824575 au 
 Jupiter MOID = 2.84102 au 
 T_jup = 3.623 
[ 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 16.5   n/a MPO459558  

118278 (1998 RO17)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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