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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338590291592219 3.5928e-08  
a 2.351244372828308 7.1234e-09 au
q 1.801384646482596 8.3748e-08 au
i 7.905509244199667 4.2302e-06 deg
node 146.0301538865024 2.4201e-05 deg
peri 152.3896454374882 2.5283e-05 deg
M 179.1011593782602 7.1021e-06 deg
tp 2457945.349650486637
(2017-Jul-10.84965049)
2.5459e-05 TDB
period 1316.876600037461
3.61
5.9845e-06
1.638e-08
d
yr
n .2733741339087953 1.2423e-09 deg/d
Q 2.901104099174019 8.7892e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1619  
   data-arc span      13991 days (38.31 yr)  
   first obs. used      1981-08-05  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51869  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:07:36  

Additional Information
 Earth MOID = .789416 au 
 Jupiter MOID = 2.34986 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-January); 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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