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40718 (1999 SU2)
Classification: Main-belt Asteroid          SPK-ID: 2040718
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1726162958737982 5.2519e-08  
a 3.164967117658738 2.2059e-08 au
q 2.618642217246115 1.698e-07 au
i 4.898685349216672 6.0332e-06 deg
node 195.4241312714124 4.7678e-05 deg
peri 171.3439548062477 4.9355e-05 deg
M 249.2841702611844 1.4409e-05 deg
tp 2459632.998425382368
(2022-Feb-22.49842538)
8.5523e-05 TDB
period 2056.611359683683
5.63
2.1501e-05
5.887e-08
d
yr
n .175045225878442 1.83e-09 deg/d
Q 3.711292018071361 2.5867e-08 au
  Orbit Determination Parameters
   # obs. used (total)      723  
   data-arc span      9834 days (26.92 yr)  
   first obs. used      1993-08-15  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54849  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:15:13  

Additional Information
 Earth MOID = 1.61755 au 
 Jupiter MOID = 1.75747 au 
 T_jup = 3.175 
[ 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 14.6   n/a MPO436057  
diameter diameter 6.196 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

40718 (1999 SU2)          Discovered 1999-Sep-21 by Sarounova, L. at Ondrejov
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 SU2 = 1993 PT5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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