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20831 Zhangyi (2000 UM47)
Classification: Main-belt Asteroid          SPK-ID: 2020831
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05734180592590069 2.8703e-08  
a 2.251696010898153 6.3933e-09 au
q 2.122579695237107 6.409e-08 au
i 2.068276803374233 3.905e-06 deg
node 355.7420349346962 7.6347e-05 deg
peri 311.3123327308634 8.3701e-05 deg
M 80.42783768208369 3.4624e-05 deg
tp 2458924.780833779572
(2020-Mar-16.28083378)
0.00011871 TDB
period 1234.136123759861
3.38
5.2562e-06
1.439e-08
d
yr
n .2917020197927931 1.2424e-09 deg/d
Q 2.3808123265592 6.7599e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1723  
   data-arc span      10539 days (28.85 yr)  
   first obs. used      1992-04-04  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50579  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:32:29  

Additional Information
 Earth MOID = 1.10637 au 
 Jupiter MOID = 2.72954 au 
 T_jup = 3.624 
[ 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 15.14   n/a E2021B10  
diameter diameter 1.812 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.340   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20831 Zhangyi           Discovered 2000 Oct. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Zhang Yi (b. 1985) was awarded second place in the 2004 Intel International Science and Engineering Fair for his environmental science team project. He also received the Intel Foundation Achievement Award. He attends the Wusong High School, Shanghai, China.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 2000 UM47 = 1992 GD2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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