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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1875242382135206 1.3369e-08  
a 2.58320490896779 1.0822e-08 au
q 2.098791376264178 3.1886e-08 au
i 13.65220970372278 8.176e-07 deg
node 76.22346220237957 1.9384e-06 deg
peri 242.3892301879901 6.601e-06 deg
M 53.8287729903993 4.8699e-06 deg
tp 2458973.749270781122
(2020-May-04.24927078)
1.9981e-05 TDB
period 1516.480090180678
4.15
9.53e-06
2.609e-08
d
yr
n .2373918407046864 1.4918e-09 deg/d
Q 3.067618441671402 1.2852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2632  
   data-arc span      17001 days (46.55 yr)  
   first obs. used      1974-08-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:31:45  

Additional Information
 Earth MOID = 1.1213 au 
 Jupiter MOID = 2.2866 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 12.89   n/a E2021B10  
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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