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120805 (1998 FF138)
Classification: Main-belt Asteroid          SPK-ID: 2120805
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380040291366144 4.8854e-08  
a 2.614312837553318 1.2986e-08 au
q 2.253527132547385 1.2376e-07 au
i 4.135265192291374 5.5562e-06 deg
node 8.217432565096512 5.4685e-05 deg
peri 214.048332508955 5.9808e-05 deg
M 64.87857265070433 2.1307e-05 deg
tp 2458722.251042377386
(2019-Aug-26.75104238)
9.1432e-05 TDB
period 1543.955433228132
4.23
1.1504e-05
3.15e-08
d
yr
n .2331673520182543 1.7373e-09 deg/d
Q 2.975098542559252 1.4778e-08 au
  Orbit Determination Parameters
   # obs. used (total)      542  
   data-arc span      9163 days (25.09 yr)  
   first obs. used      1995-09-17  
   last obs. used      2020-10-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56231  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:37  

Additional Information
 Earth MOID = 1.24667 au 
 Jupiter MOID = 2.00885 au 
 T_jup = 3.391 
[ 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 16.0   n/a MPO432708  
diameter diameter 3.463 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120805 (1998 FF138)          Discovered 1998-Mar-28 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

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Alternate Designations
 1998 FF138 = 2002 CB109 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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