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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725310092730011 5.2517e-08  
a 3.166949224586636 2.1874e-08 au
q 2.620552278552355 1.7022e-07 au
i 4.897456884657759 6.0312e-06 deg
node 195.3964694830515 4.7687e-05 deg
peri 171.1610618661281 4.9371e-05 deg
M 284.4964000596517 1.4613e-05 deg
tp 2459632.242931089772
(2022-Feb-21.74293109)
8.5742e-05 TDB
period 2058.54363653009
5.64
2.1328e-05
5.839e-08
d
yr
n .1748809175630695 1.8119e-09 deg/d
Q 3.713346170620917 2.5648e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54848  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 08:54:11  

Additional Information
 Earth MOID = 1.61786 au 
 Jupiter MOID = 1.75648 au 
 T_jup = 3.174 
[ 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 14.66   n/a E2021B10  
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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