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447785 (2007 RQ221)
Classification: Outer Main-belt Asteroid          SPK-ID: 2447785
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2356451721394309 7.7273e-08  
a 3.979831144321429 1.0547e-07 au
q 3.042003149231938 3.0133e-07 au
i 2.112816480848165 8.8071e-06 deg
node 213.8501311033145 0.00034858 deg
peri 177.0109993423798 0.00035165 deg
M 207.5817876061818 4.2736e-05 deg
tp 2460228.306022528117
(2023-Oct-10.80602253)
0.00037935 TDB
period 2899.982627850642
7.94
0.00011528
3.156e-07
d
yr
n .124138674674344 4.9346e-09 deg/d
Q 4.917659139410921 1.3032e-07 au
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      3428 days (9.39 yr)  
   first obs. used      2007-09-14  
   last obs. used      2017-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67598  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 11:36:03  

Additional Information
 Earth MOID = 2.04771 au 
 Jupiter MOID = .537819 au 
 T_jup = 3.006 
[ 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 15.9   n/a MPO402791  

447785 (2007 RQ221)          Discovered 2007-Sep-14 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-10-28

[ show close-approach data ]
Alternate Designations
 2007 RQ221 = 2007 TM391 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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