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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107378062032264 6.4657e-08  
a 2.3776756308988 1.2502e-08 AU
q 1.876609484580314 1.5538e-07 AU
i 3.402043745805434 5.7456e-06 deg
node 93.30814824667425 9.6514e-05 deg
peri 308.4629298327347 9.7948e-05 deg
M 106.504419042544 1.4984e-05 deg
tp 2456604.320076461403
(2013-Nov-07.82007646)
5.4719e-05 JED
period 1339.144175951255
3.67
1.0562e-05
2.892e-08
d
yr
n .2688284103123367 2.1202e-09 deg/d
Q 2.878741777217285 1.5136e-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 = .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 15.1 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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