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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 ]

[ show orbit diagram ]
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 
[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1982-Aug-14 03:44 < 00:01 Amphi 0.043540124321815 0.0435390011127459 0.0435412475760339 4.09268522216473 4.09268518990394 2445195.655293709 0.288180326334074 120.047482104548 42.1514355168211 -70.861110670119 146991.425334012 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 19:30:12 2020-Feb-22 19:30
1989-Dec-28 15:50 < 00:01 Psych 0.0458243306325438 0.0458234140139349 0.0458252472720633 4.95978253242815 4.9597824791935 2447889.159811542 0.327996053250392 91.9876823626837 36.1611711330427 -70.7262337930254 180523.34229636 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 19:30:12 2020-Feb-22 19:30
2090-Feb-10 02:29 < 00:01 Amphi 0.0444243793236837 0.0444204095801987 0.0444283498683804 3.84293587038479 3.84293583671127 2484457.603314553 0.631076339407257 365.731331154186 50.7733063956532 -58.1353544404437 111515.669265867 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 19:30:12 2020-Feb-22 19:30
2144-Jan-04 09:58 00:03 Thisb 0.0482164862614766 0.0482145072350742 0.0482184669639263 3.96169269537967 3.96169265968541 2504142.915078145 2.69680835409886 506.695241581749 42.7190528045175 79.8580416517052 166134.114829931 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 19:30:12 2020-Feb-22 19:30

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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