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172258 (2002 SG23)
Classification: Main-belt Asteroid          SPK-ID: 2172258
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08223197638182826 6.9143e-08  
a 2.775725836922091 2.3958e-08 au
q 2.547472415457883 2.0045e-07 au
i 1.75397526561476 4.714e-06 deg
node 95.80481368119517 0.00026057 deg
peri 249.3487429515263 0.00026297 deg
M 317.5369262376267 3.9523e-05 deg
tp 2459199.738014936320
(2020-Dec-16.23801494)
0.00018664 TDB
period 1689.130791107062
4.62
2.1869e-05
5.987e-08
d
yr
n .2131273681678935 2.7594e-09 deg/d
Q 3.003979258386298 2.5929e-08 au
  Orbit Determination Parameters
   # obs. used (total)      306  
   data-arc span      6120 days (16.76 yr)  
   first obs. used      2002-09-27  
   last obs. used      2019-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60309  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:45:47  

Additional Information
 Earth MOID = 1.54052 au 
 Jupiter MOID = 2.31944 au 
 T_jup = 3.330 
[ 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 MPO436856  
diameter diameter 3.838 km 0.725 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172258 (2002 SG23)          Discovered 2002-Sep-27 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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