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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1948986048236279 3.8275e-08  
a 2.271699824729511 8.2001e-09 au
q 1.828948698311649 8.5929e-08 au
i 7.246630646500638 4.6475e-06 deg
node 20.6805755173657 3.0502e-05 deg
peri 297.4673940656943 3.2891e-05 deg
M 230.8159584831888 1.49e-05 deg
tp 2459649.277639783489
(2022-Mar-10.77763978)
5.3115e-05 TDB
period 1250.618485264155
3.42
6.7715e-06
1.854e-08
d
yr
n .2878575714670977 1.5586e-09 deg/d
Q 2.714450951147372 9.7983e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1250  
   data-arc span      10778 days (29.51 yr)  
   first obs. used      1991-09-11  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50395  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:14:18  

Additional Information
 Earth MOID = .828092 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 15.07   n/a E2021B10  
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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