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26838 (1991 RC9)
Classification: Main-belt Asteroid          SPK-ID: 2026838
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09711205803874025 3.536e-08  
a 2.290490209809374 7.7517e-09 au
q 2.068055991617199 8.1459e-08 au
i 4.05385228884146 4.0718e-06 deg
node 18.71324921705754 4.8499e-05 deg
peri 338.4296636315611 5.1878e-05 deg
M 351.4411427044044 1.8968e-05 deg
tp 2458630.602625186268
(2019-May-27.10262519)
6.6742e-05 TDB
period 1266.167280605702
3.47
6.4277e-06
1.76e-08
d
yr
n .284322621121425 1.4434e-09 deg/d
Q 2.512924428001548 8.5045e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1583  
   data-arc span      10277 days (28.14 yr)  
   first obs. used      1991-09-11  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:55:49  

Additional Information
 Earth MOID = 1.06369 au 
 Jupiter MOID = 2.85994 au 
 T_jup = 3.589 
[ 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 14.6   n/a MPO347723  
diameter diameter 3.969 km 0.366 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.195   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26838 (1991 RC9)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RC9 = 1998 SJ159 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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