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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05470409557087207 4.8644e-08  
a 2.771388100164503 2.2316e-08 au
q 2.619781820669126 1.4186e-07 au
i 4.379941534615207 6.0587e-06 deg
node 18.25077792933613 5.6915e-05 deg
peri 112.9440986557825 7.7948e-05 deg
M 290.9360402899598 5.3307e-05 deg
tp 2459323.790856956878
(2021-Apr-19.29085696)		 0.00025008 TDB
period 1685.172830997653
4.61		 2.0354e-05
5.573e-08		 d
yr
n .2136279397448353 2.5803e-09 deg/d
Q 2.922994379659879 2.3537e-08 au
   Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      7337 days (20.09 yr)  
   first obs. used      2000-09-21  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6013  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:25:03  

Additional Information
 Earth MOID = 1.63786 au 
 Jupiter MOID = 2.08662 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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