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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430885154121618 4.664e-08  
a 3.190067645234552 2.0992e-08 au
q 2.733605601813569 1.5461e-07 au
i 4.647547413667545 5.1874e-06 deg
node 344.6204860873563 5.1226e-05 deg
peri 359.6002218998654 5.3453e-05 deg
M 24.67197796138231 1.4654e-05 deg
tp 2458857.873661531358
(2020-Jan-09.37366153)
8.4542e-05 TDB
period 2081.125474782739
5.70
2.0542e-05
5.624e-08
d
yr
n .1729833229001161 1.7075e-09 deg/d
Q 3.646529688655535 2.3996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      8037 days (22.00 yr)  
   first obs. used      1997-10-31  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58699  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:19:41  

Additional Information
 Earth MOID = 1.72603 au 
 Jupiter MOID = 1.75876 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 14.6   n/a MPO502467  
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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