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46736 (1997 UD21)
Classification: Main-belt Asteroid          SPK-ID: 2046736
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1431783088450961 3.5067e-08  
a 3.190812126687031 1.7298e-08 au
q 2.733957042545557 1.1039e-07 au
i 4.64738993472586 3.9233e-06 deg
node 344.6177822668758 4.9811e-05 deg
peri 359.687298835117 5.2086e-05 deg
M 59.18570313472644 1.4345e-05 deg
tp 2458858.233346603501
(2020-Jan-09.73334660)
8.2887e-05 TDB
period 2081.854040700652
5.70
1.6929e-05
4.635e-08
d
yr
n .1729227856333488 1.4062e-09 deg/d
Q 3.647667210828505 1.9775e-08 au
  Orbit Determination Parameters
   # obs. used (total)      897  
   data-arc span      8505 days (23.29 yr)  
   first obs. used      1997-10-31  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:52:03  

Additional Information
 Earth MOID = 1.72458 au 
 Jupiter MOID = 1.75834 au 
 T_jup = 3.176 
[ 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 14.65   n/a MPCxxxxx  
diameter diameter 5.586 km 0.720 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.098   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46736 (1997 UD21)          Discovered 1997-Oct-31 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 UD21 = 2000 EF23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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