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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457508.5 (2016-Apr-30.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804944686051584 4.219e-08  
q 1.824496618228072 9.5081e-08 au
tp 2457196.065913299405
(2015-Jun-22.56591330)
3.1324e-05 TDB
node 280.4315414221609 0.0001089 deg
peri 85.92167743201419 0.00010931 deg
i 2.289067772814432 3.5278e-06 deg
  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
 Jupiter MOID = 2.84102 au 
 T_jup = 3.623 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.780035834432921E-15 -4.003336532289135E-15 -1.573785268294766E-13 1.014410452192919E-14 -1.00926672886719E-13 -7.71273899977366E-16
q -4.003336532289135E-15 9.040348047602348E-15 3.586492063082422E-13 -2.129796269088265E-14 2.282355632746226E-13 1.800434658349836E-15
tp -1.573785268294766E-13 3.586492063082422E-13 9.812005107731515E-10 -4.328745374728311E-12 3.125415452138928E-10 2.647753794083598E-13
node 1.014410452192919E-14 -2.129796269088265E-14 -4.328745374728311E-12 1.185897768590176E-8 -1.185076938006015E-8 6.013960457670719E-11
peri -1.00926672886719E-13 2.282355632746226E-13 3.125415452138928E-10 -1.185076938006015E-8 1.194838123891325E-8 -6.000099455147643E-11
i -7.71273899977366E-16 1.800434658349836E-15 2.647753794083598E-13 6.013960457670719E-11 -6.000099455147643E-11 1.244546048803728E-11

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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