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20654 (1999 TO247)
Classification: Main-belt Asteroid          SPK-ID: 2020654
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08048824920251048 3.7168e-08  
a 3.156357427637265 2.1482e-08 au
q 2.902307744429401 1.2264e-07 au
i 5.471312241525895 3.895e-06 deg
node 111.8287534247452 5.0686e-05 deg
peri 140.5290678423495 5.9281e-05 deg
M 64.00007763819431 3.0176e-05 deg
tp 2458836.370644427674
(2019-Dec-18.87064443)
0.00017186 TDB
period 2048.225140398997
5.61
2.091e-05
5.725e-08
d
yr
n .1757619281686346 1.7943e-09 deg/d
Q 3.410407110845128 2.3211e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1496  
   data-arc span      8921 days (24.42 yr)  
   first obs. used      1996-05-15  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50038  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:08  

Additional Information
 Earth MOID = 1.88871 au 
 Jupiter MOID = 1.63508 au 
 T_jup = 3.194 
[ 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 13.52   n/a E2021B10  
diameter diameter 11.298 km 0.383 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20654 (1999 TO247)          Discovered 1999-Oct-08 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TO247 = 1996 JT2 = 1998 QU31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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