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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2426485567064548 3.8172e-08  
a 3.011856970616432 1.6331e-08 au
q 2.281034223690079 1.1343e-07 au
i 4.372860520787708 5.2028e-06 deg
node 309.8851906905543 6.0747e-05 deg
peri 250.1032414794589 6.1937e-05 deg
M 67.60139452821878 1.1864e-05 deg
tp 2458841.988495211584
(2019-Dec-24.48849521)
6.1707e-05 TDB
period 1909.19348076399
5.23
1.5528e-05
4.251e-08
d
yr
n .1885612975464075 1.5336e-09 deg/d
Q 3.742679717542784 2.0294e-08 au
  Orbit Determination Parameters
   # obs. used (total)      679  
   data-arc span      7761 days (21.25 yr)  
   first obs. used      1999-04-15  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:02  

Additional Information
 Earth MOID = 1.28263 au 
 Jupiter MOID = 1.27734 au 
 T_jup = 3.199 
[ 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 15.08   n/a E2021B55  
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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