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40310 (1999 KU4)
Classification: Mars-crossing Asteroid          SPK-ID: 2040310
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4056316692788532 4.574e-08  
a 2.193766186948226 6.4042e-09 au
q 1.303905146528913 1.0009e-07 au
i 8.424533037225334 5.0855e-06 deg
node 76.37598514579599 3.3532e-05 deg
peri 223.3482225342753 3.4562e-05 deg
M 146.2769042659753 1.2656e-05 deg
tp 2458518.266702875012
(2019-Feb-03.76670288)
3.9856e-05 TDB
period 1186.817480422825
3.25
5.197e-06
1.423e-08
d
yr
n .3033322359489882 1.3283e-09 deg/d
Q 3.08362722736754 9.002e-09 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      12299 days (33.67 yr)  
   first obs. used      1986-05-04  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61353  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:49:32  

Additional Information
 Earth MOID = .307336 au 
 Jupiter MOID = 2.19123 au 
 T_jup = 3.546 
[ 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 16.1   n/a MPO436053  
diameter diameter 2.675 km 0.713 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.082   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
SMASSII spectral type spec_B S:   n/a Binzel et al. (2004) Icarus 170, 259-294 SMASSIR data only, classification consistent with specified type, but uncertain

40310 (1999 KU4)          Discovered 1999-May-18 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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