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9871 Jeon (1992 DG1)
Classification: Main-belt Asteroid          SPK-ID: 2009871
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .149722303415738 4.424e-08  
a 2.370762170881351 8.7019e-09 au
q 2.0158061978061 1.0425e-07 au
i 5.568241744666356 4.6234e-06 deg
node 347.8652446851364 4.0489e-05 deg
peri 231.7895776778014 4.2465e-05 deg
M 233.6515447252429 1.5597e-05 deg
tp 2459468.448269892987
(2021-Sep-10.94826989)
5.8943e-05 TDB
period 1333.307770127776
3.65
7.3408e-06
2.01e-08
d
yr
n .2700051766483741 1.4866e-09 deg/d
Q 2.725718143956603 1.0005e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2066  
   data-arc span      22251 days (60.92 yr)  
   first obs. used      1959-03-06  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:29:49  

Additional Information
 Earth MOID = 1.01412 au 
 Jupiter MOID = 2.26773 au 
 T_jup = 3.523 
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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 13.3   n/a MPO347604  
diameter diameter 3.763 km 0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.787   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

9871 Jeon           Discovered 1992 Feb. 28 by T. Fujii and K. Watanabe at Kitami.
Jeon San-Woon (b. 1928) is a historian of Korean astronomy and technology. He served as president of the Korean Society of History and Science. He was also a guest professor at Kyoto University in Japan and at Yonsei University in Korea.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

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Alternate Designations
 1992 DG1 = 1952 HD2 = 1959 EN = 1970 EH3 = 1988 BN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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