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136957 (1998 RQ8)
Classification: Main-belt Asteroid          SPK-ID: 2136957
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1297898959260533 5.4421e-08  
a 2.443102528740542 1.2719e-08 au
q 2.126012505798629 1.3335e-07 au
i 3.132564396447024 5.4308e-06 deg
node 339.6057189701116 8.2506e-05 deg
peri 19.83384498383234 8.5188e-05 deg
M 221.9674897605341 2.553e-05 deg
tp 2459535.298095514025
(2021-Nov-16.79809551)
0.00010179 TDB
period 1394.796878293692
3.82
1.0892e-05
2.982e-08
d
yr
n .258102097590297 2.0155e-09 deg/d
Q 2.760192551682455 1.437e-08 au
  Orbit Determination Parameters
   # obs. used (total)      523  
   data-arc span      7924 days (21.69 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:42:08  

Additional Information
 Earth MOID = 1.12261 au 
 Jupiter MOID = 2.67836 au 
 T_jup = 3.487 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO432831  

136957 (1998 RQ8)          Discovered 1998-Sep-13 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 RQ8 = 2002 RH17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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