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20563 (1999 RG121)
Classification: Main-belt Asteroid          SPK-ID: 2020563
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1448716301384347 2.6315e-08  
a 2.598922412038139 1.1153e-08 au
q 2.222412285602861 7.2229e-08 au
i 13.56860675709319 6.4288e-07 deg
node 198.2735242391788 4.1738e-06 deg
peri 239.3434946129492 9.1984e-06 deg
M 299.0293481259491 1.0251e-05 deg
tp 2459459.683133369299
(2021-Sep-02.18313337)
4.4327e-05 TDB
period 1530.341650368
4.19
9.8512e-06
2.697e-08
d
yr
n .235241587990127 1.5143e-09 deg/d
Q 2.975432538473417 1.2769e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1963  
   data-arc span      12187 days (33.37 yr)  
   first obs. used      1987-09-30  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45472  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:53  

Additional Information
 Earth MOID = 1.26792 au 
 Jupiter MOID = 2.44494 au 
 T_jup = 3.362 
[ 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 13.91   n/a E2021B10  
diameter diameter 4.726 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.199   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20563 (1999 RG121)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RG121 = 1987 SF11 = 1998 KA51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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