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20013 (1991 RT26)
Classification: Main-belt Asteroid          SPK-ID: 2020013
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1678860284356719 3.2123e-08  
a 2.618489010610315 1.2275e-08 au
q 2.178881290116498 8.8468e-08 au
i 13.18911036723423 1.2797e-06 deg
node 194.3224043584903 4.8172e-06 deg
peri 161.0674990502309 4.8464e-06 deg
M 339.5505528075247 6.3815e-06 deg
tp 2459288.413107546082
(2021-Mar-14.91310755)
2.7777e-05 TDB
period 1547.656443653656
4.24
1.0883e-05
2.98e-08
d
yr
n .2326097639280485 1.6357e-09 deg/d
Q 3.058096731104133 1.4336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2056  
   data-arc span      10695 days (29.28 yr)  
   first obs. used      1991-09-09  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45214  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:11:22  

Additional Information
 Earth MOID = 1.17803 au 
 Jupiter MOID = 2.42252 au 
 T_jup = 3.349 
[ 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 13.33   n/a E2021B10  
diameter diameter 4.987 km 0.354 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.448   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20013 (1991 RT26)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RT26 = 1991 TS12 = 1991 VM14 = 1995 SX54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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