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11890 (1991 FF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2011890
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04703887956901533 4.4584e-08  
a 3.231148977470944 1.9995e-08 au
q 3.079159349850141 1.4251e-07 au
i 17.81504862616431 4.884e-06 deg
node 337.585526778123 1.1e-05 deg
peri 209.4776663281813 3.9741e-05 deg
M 43.41531003155856 3.7382e-05 deg
tp 2458944.656547940775
(2020-Apr-05.15654794)
0.00022068 TDB
period 2121.455373101586
5.81
1.9692e-05
5.391e-08
d
yr
n .1696948258089808 1.5751e-09 deg/d
Q 3.383138605091747 2.0935e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1788  
   data-arc span      11954 days (32.73 yr)  
   first obs. used      1987-10-18  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:01:01  

Additional Information
 Earth MOID = 2.09328 au 
 Jupiter MOID = 1.62814 au 
 T_jup = 3.109 
[ 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 13.04   n/a E2021B10  
diameter diameter 8.672 km 0.459 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.162   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11890 (1991 FF)          Discovered 1991-Mar-18 by McNaught, R. H. at Siding Spring
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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