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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2342518063853584 9.3812e-09  
a 2.350997844156686 6.3453e-09 au
q 1.800272352354899 2.3449e-08 au
i 7.907025326004068 4.3048e-07 deg
node 146.0283789305431 1.8341e-06 deg
peri 152.428189131332 4.0418e-06 deg
M 343.1361756712826 5.8049e-06 deg
tp 2459262.178008418945
(2021-Feb-16.67800842)
2.1359e-05 TDB
period 1316.669493111883
3.60
5.3305e-06
1.459e-08
d
yr
n .273417134583378 1.1069e-09 deg/d
Q 2.901723335958473 7.8316e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2015  
   data-arc span      14243 days (39.00 yr)  
   first obs. used      1981-08-05  
   last obs. used      2020-08-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48636  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:24  

Additional Information
 Earth MOID = .787089 au 
 Jupiter MOID = 2.35106 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 14.17   n/a E2021B10  
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. 2020-October); 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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