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146773 (2001 XO221)
Classification: Main-belt Asteroid          SPK-ID: 2146773
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1016978905651035 4.3034e-08  
a 2.763726246240943 1.753e-08 au
q 2.482661116898827 1.1939e-07 au
i 3.461333885730433 4.0418e-06 deg
node 284.0203461281836 8.3357e-05 deg
peri 22.19683858045477 8.6712e-05 deg
M 109.1881668711617 2.3468e-05 deg
tp 2458491.504391588684
(2019-Jan-08.00439159)
0.00010884 TDB
period 1678.189352187667
4.59
1.5967e-05
4.372e-08
d
yr
n .2145169134404937 2.041e-09 deg/d
Q 3.044791375583059 1.9313e-08 au
  Orbit Determination Parameters
   # obs. used (total)      618  
   data-arc span      7150 days (19.58 yr)  
   first obs. used      2000-07-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59081  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:39:17  

Additional Information
 Earth MOID = 1.46803 au 
 Jupiter MOID = 2.15711 au 
 T_jup = 3.330 
[ 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 MPO502888  
diameter diameter 4.407 km 0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

146773 (2001 XO221)          Discovered 2001-Dec-15 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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