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101121 (1998 RO54)
Classification: Main-belt Asteroid          SPK-ID: 2101121
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494423103620265 4.0211e-08  
a 2.2643433326564 7.4757e-09 au
q 1.925954633571376 9.0707e-08 au
i 3.779477268912147 3.1736e-06 deg
node 250.3407343530833 6.6517e-05 deg
peri 131.5684137891558 6.7855e-05 deg
M 115.7559267122582 1.3348e-05 deg
tp 2458600.322581004516
(2019-Apr-26.82258100)
4.5603e-05 TDB
period 1244.548550818336
3.41
6.1633e-06
1.687e-08
d
yr
n .2892615155618373 1.4325e-09 deg/d
Q 2.602732031741422 8.5928e-09 au
  Orbit Determination Parameters
   # obs. used (total)      901  
   data-arc span      7939 days (21.74 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48991  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:02:18  

Additional Information
 Earth MOID = .931642 au 
 Jupiter MOID = 2.85649 au 
 T_jup = 3.600 
[ 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 15.8   n/a MPO359462  

101121 (1998 RO54)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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