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129661 (1998 QR54)
Classification: Main-belt Asteroid          SPK-ID: 2129661
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 .3660013520066597 4.4135e-08  
a 2.696836880888735 9.5468e-09 au
q 1.709790936342035 1.1992e-07 au
i 13.41469853713676 5.2554e-06 deg
node 181.8013036859745 2.432e-05 deg
peri 126.3143285570313 2.5462e-05 deg
M 345.7257248950355 5.5511e-06 deg
tp 2459064.640450636496
(2020-Aug-03.14045064)
2.4978e-05 TDB
period 1617.634665112189
4.43
8.5896e-06
2.352e-08
d
yr
n .2225471596054308 1.1817e-09 deg/d
Q 3.683882825435434 1.3041e-08 au
  Orbit Determination Parameters
   # obs. used (total)      432  
   data-arc span      11294 days (30.92 yr)  
   first obs. used      1989-08-30  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:41:27  

Additional Information
 Earth MOID = .734473 au 
 Jupiter MOID = 1.84485 au 
 T_jup = 3.233 
[ 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 15.8   n/a MPO469352  

129661 (1998 QR54)          Discovered 1998-Aug-27 by LONEOS at Anderson Mesa
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 QR54 = 2002 JW124 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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