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13971 (1991 UF1)
Classification: Main-belt Asteroid          SPK-ID: 2013971
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2109423377028438 6.4763e-08  
a 2.377229334460262 1.2332e-08 au
q 1.875771021393439 1.5567e-07 au
i 3.401950366939654 5.7455e-06 deg
node 93.30077571920698 9.6533e-05 deg
peri 308.3510785741895 9.7963e-05 deg
M 268.0000663638351 1.5476e-05 deg
tp 2457942.629136475433
(2017-Jul-08.12913648)
5.8784e-05 JED
period 1338.767151922593
3.67
1.0417e-05
2.852e-08
d
yr
n .2689041178542564 2.0924e-09 deg/d
Q 2.878687647527086 1.4933e-08 au
  Orbit Determination Parameters
   # obs. used (total)      816  
   data-arc span      8607 days (23.56 yr)  
   first obs. used      1991-10-18  
   last obs. used      2015-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55381  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:19:17  

Additional Information
 Earth MOID = .885108 au 
 Jupiter MOID = 2.53226 au 
 T_jup = 3.508 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1 mag n/a MPO337376  

13971 (1991 UF1)          Discovered 1991-Oct-18 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 UF1 = 1993 FR31 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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