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136958 (1998 RN9)
Classification: Main-belt Asteroid          SPK-ID: 2136958
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427757097842498 2.9948e-08  
a 2.448763402660585 1.0877e-08 au
q 2.099139469752025 7.4644e-08 au
i .8438121318252753 4.4428e-06 deg
node 356.0177975901302 0.0002559 deg
peri 249.4173534681788 0.00025645 deg
M 320.5758891281552 1.741e-05 deg
tp 2459153.777381518652
(2020-Oct-31.27738152)
6.789e-05 TDB
period 1399.647477810893
3.83
9.3255e-06
2.553e-08
d
yr
n .2572076224243657 1.7137e-09 deg/d
Q 2.798387335569144 1.243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      404  
   data-arc span      7922 days (21.69 yr)  
   first obs. used      1998-09-13  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5706  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 15:48:33  

Additional Information
 Earth MOID = 1.08594 au 
 Jupiter MOID = 2.22141 au 
 T_jup = 3.483 
[ 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 16.6   n/a MPO417725  

136958 (1998 RN9)          Discovered 1998-Sep-13 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 RN9 = 2005 JP38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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