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13969 (1991 RK26)
Classification: Main-belt Asteroid          SPK-ID: 2013969
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1947868999835763 4.1813e-08  
a 2.27197241783679 8.7756e-09 au
q 1.829421953718171 9.3301e-08 au
i 7.245921503442752 4.9451e-06 deg
node 20.68715089893169 3.2077e-05 deg
peri 297.4275212148218 3.4521e-05 deg
M 173.2931988972995 1.5183e-05 deg
tp 2458398.381422811189
(2018-Oct-06.88142281)
5.0996e-05 TDB
period 1250.843594366529
3.42
7.2471e-06
1.984e-08
d
yr
n .2878057669410831 1.6675e-09 deg/d
Q 2.714522881955409 1.0485e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      10343 days (28.32 yr)  
   first obs. used      1991-09-11  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:18:54  

Additional Information
 Earth MOID = .83048 au 
 Jupiter MOID = 2.62141 au 
 T_jup = 3.576 
[ 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 15.1   n/a MPO395139  
diameter diameter 2.779 km 0.674 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.363   0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13969 (1991 RK26)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RK26 = 1997 GU18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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