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146421 (2001 QP220)
Classification: Main-belt Asteroid          SPK-ID: 2146421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1087323142798341 5.2352e-08  
a 2.563919528314255 2.6733e-08 au
q 2.285138624373386 1.4471e-07 au
i 14.41547627644766 7.8102e-06 deg
node 297.8836545830519 1.7801e-05 deg
peri 309.2583295201263 6.77e-05 deg
M 273.0132987110615 7.6318e-05 deg
tp 2459362.830900414335
(2021-May-28.33090041)
0.00032228 TDB
period 1499.529493777317
4.11
2.3452e-05
6.421e-08
d
yr
n .2400753046164897 3.7547e-09 deg/d
Q 2.842700432255125 2.9639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      602  
   data-arc span      7351 days (20.13 yr)  
   first obs. used      2000-04-06  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54082  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:27:56  

Additional Information
 Earth MOID = 1.29645 au 
 Jupiter MOID = 2.34266 au 
 T_jup = 3.381 
[ 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 15.6   n/a MPO359749  

146421 (2001 QP220)          Discovered 2001-Aug-24 by LONEOS at Anderson Mesa
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

[ show close-approach data ]
Alternate Designations
 2001 QP220 = 2004 BN95 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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