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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1500444751356146 4.4513e-08  
a 2.370127928603782 8.9461e-09 au
q 2.014503327552166 1.0471e-07 au
i 5.569003681998295 4.9034e-06 deg
node 347.8761233362428 4.0754e-05 deg
peri 231.7555845303408 4.2887e-05 deg
M 125.6584555297318 1.5503e-05 deg
tp 2458135.293980745236
(2018-Jan-16.79398075)
5.6516e-05 TDB
period 1332.772762689967
3.65
7.5459e-06
2.066e-08
d
yr
n .270113563300471 1.5293e-09 deg/d
Q 2.725752529655398 1.0288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1904  
   data-arc span      22154 days (60.65 yr)  
   first obs. used      1959-03-06  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52188  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:20:04  

Additional Information
 Earth MOID = 1.01297 au 
 Jupiter MOID = 2.26853 au 
 T_jup = 3.524 
[ 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 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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