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11730 Yanhua (1998 KO31)
Classification: Main-belt Asteroid          SPK-ID: 2011730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06681756454851451 3.7849e-08  
a 2.405994786183115 7.5862e-09 au
q 2.245232074253936 9.2002e-08 au
i 4.239598546710127 3.9386e-06 deg
node 147.2475558663132 4.4498e-05 deg
peri 1.624484152907259 5.2048e-05 deg
M 99.43511236480984 2.5503e-05 deg
tp 2458823.988957635209
(2019-Dec-06.48895764)
9.6816e-05 TDB
period 1363.139961606699
3.73
6.4471e-06
1.765e-08
d
yr
n .2640961384300385 1.2491e-09 deg/d
Q 2.566757498112295 8.0931e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1872  
   data-arc span      17082 days (46.77 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50267  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:37  

Additional Information
 Earth MOID = 1.25617 au 
 Jupiter MOID = 2.41644 au 
 T_jup = 3.516 
[ 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 MPO492884  
diameter diameter 3.100 km 0.712 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.350   0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11730 Yanhua           Discovered 1998 May 22 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Yan Hua (b. 1984) is a finalist in the 2002 Intel International Science and Engineering Fair for his engineering project. He attends the Jinling High School, Nanjing, Jiangsu, China.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1998 KO31 = 4310 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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