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101858 (1999 KE8)
Classification: Main-belt Asteroid          SPK-ID: 2101858
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2420884754173624 3.8184e-08  
a 3.009024435101563 1.6473e-08 au
q 2.280574297114236 1.1335e-07 au
i 4.372536988925541 5.2039e-06 deg
node 309.8891816692691 6.0946e-05 deg
peri 249.957741942409 6.2144e-05 deg
M 30.03172252461101 1.1794e-05 deg
tp 2458841.456933585487
(2019-Dec-23.95693359)
6.1906e-05 TDB
period 1906.500829657829
5.22
1.5656e-05
4.286e-08
d
yr
n .1888276125558316 1.5506e-09 deg/d
Q 3.737474573088891 2.0461e-08 au
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      7761 days (21.25 yr)  
   first obs. used      1999-04-15  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5048  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:08  

Additional Information
 Earth MOID = 1.28295 au 
 Jupiter MOID = 1.28312 au 
 T_jup = 3.201 
[ 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 15.0   n/a MPO341288  
diameter diameter 5.521 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101858 (1999 KE8)          Discovered 1999-May-18 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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