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20452 (1999 KG4)
Classification: Main-belt Asteroid          SPK-ID: 2020452
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2341153438303097 3.1543e-08  
a 2.350652785173692 6.4366e-09 au
q 1.800328900147078 7.4547e-08 au
i 7.906889267782637 3.8958e-06 deg
node 146.0304073683205 2.2003e-05 deg
peri 152.4381092758892 2.3141e-05 deg
M 288.4261378449922 7.2195e-06 deg
tp 2459262.217706025564
(2021-Feb-16.71770603)
2.6764e-05 TDB
period 1316.379629831264
3.60
5.4068e-06
1.48e-08
d
yr
n .273477340306569 1.1233e-09 deg/d
Q 2.900976670200306 7.9435e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1983  
   data-arc span      14243 days (39.00 yr)  
   first obs. used      1981-08-05  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48672  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:35:44  

Additional Information
 Earth MOID = .789112 au 
 Jupiter MOID = 2.35226 au 
 T_jup = 3.508 
[ 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 14.1   n/a MPO358826  
diameter diameter 4.395 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.849 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Higgins, D.; Goncalves, R.M.D. (2007) Minor Planet Bull. 34, 16-18.]
geometric albedo albedo 0.230   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

20452 (1999 KG4)          Discovered 1999-May-20 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 KG4 = 1981 PN = 1998 EH16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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