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6917 (1993 FR2)
Classification: Main-belt Asteroid          SPK-ID: 2006917
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08116678050454178 3.1714e-08  
a 2.216440725169658 5.4299e-09 au
q 2.036539367328485 6.9726e-08 au
i 3.7995124283316 3.4234e-06 deg
node 167.0398903286497 4.1182e-05 deg
peri 19.94369658590015 4.4747e-05 deg
M 92.28668418874246 1.8123e-05 deg
tp 2458691.527981274140
(2019-Jul-27.02798127)
6.0455e-05 TDB
period 1205.265176868041
3.30
4.4291e-06
1.213e-08
d
yr
n .2986894559880036 1.0976e-09 deg/d
Q 2.39634208301083 5.8706e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      25203 days (69.00 yr)  
   first obs. used      1951-08-06  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:44:45  

Additional Information
 Earth MOID = 1.03816 au 
 Jupiter MOID = 2.55896 au 
 T_jup = 3.646 
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Orbital Elements at Epoch 2456829.5 (2014-Jun-21.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08114763813188404 3.1671e-08  
q 2.035877289374764 6.961e-08 au
tp 2456281.912076365838
(2012-Dec-20.41207637)
5.9432e-05 TDB
node 167.0791759673483 4.1201e-05 deg
peri 19.80391626558356 4.4779e-05 deg
i 3.798476040223498 3.4234e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      25203 days (69.00 yr)  
   first obs. used      1951-08-06  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:44:45  

Additional Information
 Jupiter MOID = 2.55896 au 
 T_jup = 3.646 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.00302872861067E-15 -2.199052820597021E-15 -2.767727956698235E-13 -1.320888670430013E-15 -8.102323200403335E-14 3.607876062577007E-16
q -2.199052820597021E-15 4.84554250152546E-15 6.271531927727484E-13 2.431389971257691E-15 1.865090235602753E-13 -7.972011795425301E-16
tp -2.767727956698235E-13 6.271531927727484E-13 3.532172076387309E-9 -5.359476834180536E-12 1.047683355846576E-9 -8.483721345439969E-13
node -1.320888670430013E-15 2.431389971257691E-15 -5.359476834180536E-12 1.697486950192011E-9 -1.694942906002188E-9 4.826167943801339E-12
peri -8.102323200403335E-14 1.865090235602753E-13 1.047683355846576E-9 -1.694942906002188E-9 2.005150561515589E-9 -5.051610994006845E-12
i 3.607876062577007E-16 -7.972011795425301E-16 -8.483721345439969E-13 4.826167943801339E-12 -5.051610994006845E-12 1.171949937372042E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO267735  
diameter diameter 4.396 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.205   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6917 (1993 FR2)          Discovered 1993-Mar-29 by Otomo, S. at Kiyosato
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1993 FR2 = 1983 EM2 = 1986 AX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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