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20797 (2000 SD172)
Classification: Main-belt Asteroid          SPK-ID: 2020797
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1877086762757713 2.7429e-08  
a 2.583686715469146 1.3059e-08 au
q 2.098706302197137 7.1412e-08 au
i 13.65223918318236 3.6254e-06 deg
node 76.22547885713392 1.699e-05 deg
peri 242.3848267654816 2.2016e-05 deg
M 6.347271549918011 1.3056e-05 deg
tp 2458973.754988857071
(2020-May-04.25498886)
5.5083e-05 TDB
period 1516.9043794225
4.15
1.15e-05
3.149e-08
d
yr
n .2373254404717688 1.7993e-09 deg/d
Q 3.068667128741155 1.551e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2385  
   data-arc span      16885 days (46.23 yr)  
   first obs. used      1974-08-20  
   last obs. used      2020-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41033  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:14:55  

Additional Information
 Earth MOID = 1.1231 au 
 Jupiter MOID = 2.28627 au 
 T_jup = 3.359 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO435893  
diameter diameter 7.484 km 0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.346   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20797 (2000 SD172)          Discovered 2000-Sep-27 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2000 SD172 = 1989 CC9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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