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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107378046968721 6.48e-08  
a 2.37767562837419 1.3018e-08 AU
q 1.876609486169357 1.5557e-07 AU
i 3.402042852266538 6.3403e-06 deg
node 93.30814725728516 9.6948e-05 deg
peri 308.4629381659198 9.8954e-05 deg
M 106.5044148272986 1.6476e-05 deg
tp 2456604.320092772457
(2013-Nov-07.82009277)
6.0716e-05 JED
period 1339.144173818405
3.67
1.0998e-05
3.011e-08
d
yr
n .2688284107404988 2.2077e-09 deg/d
Q 2.878741770579023 1.5761e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      733  
   data-arc span      8443 days (23.12 yr)  
   first obs. used      1991-10-18  
   last obs. used      2014-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:21:56  

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 (399)
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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