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22789 (1999 KA4)
Classification: Main-belt Asteroid          SPK-ID: 2022789
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0906019372008709 3.5668e-08  
a 2.250857660274026 6.9449e-09 au
q 2.046925595889779 7.9694e-08 au
i 2.652723111877443 3.0161e-06 deg
node 56.43657717297421 8.3419e-05 deg
peri 112.4389043580227 8.535e-05 deg
M 190.2592976939918 2.0164e-05 deg
tp 2459782.072642375543
(2022-Jul-21.57264238)
7.0275e-05 TDB
period 1233.446948262006
3.38
5.7086e-06
1.563e-08
d
yr
n .2918650052256075 1.3508e-09 deg/d
Q 2.454789724658272 7.5741e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1304  
   data-arc span      17248 days (47.22 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51582  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:11  

Additional Information
 Earth MOID = 1.05423 au 
 Jupiter MOID = 2.50958 au 
 T_jup = 3.620 
[ 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 15.65   n/a E2021B10  

22789 (1999 KA4)          Discovered 1999-May-18 by Spacewatch at Kitt Peak
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 KA4 = 3228 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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