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109478 (2001 QJ221)
Classification: Main-belt Asteroid          SPK-ID: 2109478
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0815910520086313 5.8938e-08  
a 2.85983226879701 2.502e-08 au
q 2.626495545417631 1.6112e-07 au
i 4.903397954344715 6.34e-06 deg
node 231.337737385294 7.2513e-05 deg
peri 85.51567358320466 8.7566e-05 deg
M 324.3888427639104 5.2889e-05 deg
tp 2459175.240211215818
(2020-Nov-21.74021122)
0.00026091 TDB
period 1766.482218498166
4.84
2.3182e-05
6.347e-08
d
yr
n .2037948620315387 2.6744e-09 deg/d
Q 3.093168992176389 2.7061e-08 au
  Orbit Determination Parameters
   # obs. used (total)      438  
   data-arc span      6949 days (19.03 yr)  
   first obs. used      2000-04-24  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61749  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:46:31  

Additional Information
 Earth MOID = 1.61887 au 
 Jupiter MOID = 2.1248 au 
 T_jup = 3.292 
[ 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 15.4   n/a MPO432617  

109478 (2001 QJ221)          Discovered 2001-Aug-24 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 QJ221 = 2000 HV55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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