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146772 (2001 XD221)
Classification: Main-belt Asteroid          SPK-ID: 2146772
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05474010416346374 4.8764e-08  
a 2.770576968555566 2.3035e-08 au
q 2.618915296703941 1.4207e-07 au
i 4.380626102050911 6.2467e-06 deg
node 18.25158660911794 5.7094e-05 deg
peri 113.28885417 7.9116e-05 deg
M 205.1077890356404 5.5044e-05 deg
tp 2459325.237668681619
(2021-Apr-20.73766868)
0.00025924 TDB
period 1684.433058970387
4.61
2.1007e-05
5.751e-08
d
yr
n .2137217612079229 2.6654e-09 deg/d
Q 2.922238640407191 2.4296e-08 au
  Orbit Determination Parameters
   # obs. used (total)      312  
   data-arc span      6981 days (19.11 yr)  
   first obs. used      2000-09-21  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59378  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 13:01:22  

Additional Information
 Earth MOID = 1.63734 au 
 Jupiter MOID = 2.08831 au 
 T_jup = 3.331 
[ 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 16.1   n/a MPO459680  
diameter diameter 3.515 km 0.612 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

146772 (2001 XD221)          Discovered 2001-Dec-15 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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