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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107378070930917 6.4718e-08  
a 2.377675631581033 1.2675e-08 AU
q 1.876609483002965 1.5547e-07 AU
i 3.402043655519932 6.0022e-06 deg
node 93.3081476804258 9.668e-05 deg
peri 308.4629281443612 9.8333e-05 deg
M 106.5044203684901 1.5529e-05 deg
tp 2456604.320071358574
(2013-Nov-07.82007136)
5.6925e-05 JED
period 1339.144176527622
3.67
1.0708e-05
2.932e-08
d
yr
n .2688284101966332 2.1496e-09 deg/d
Q 2.878741780159102 1.5346e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      766  
   data-arc span      8555 days (23.42 yr)  
   first obs. used      1991-10-18  
   last obs. used      2015-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54984  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:48:20  

Additional Information
 Earth MOID = .887158 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 15.0 mag n/a MPO272706  

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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