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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107378065004213 6.4811e-08  
a 2.377675626000612 1.3088e-08 AU
q 1.876609480007727 1.5562e-07 AU
i 3.402043961074741 6.3949e-06 deg
node 93.30814303816705 9.7017e-05 deg
peri 308.4629484814423 9.9077e-05 deg
M 106.5044113838653 1.6594e-05 deg
tp 2456604.320106174741
(2013-Nov-07.82010617)
6.1199e-05 JED
period 1339.14417181315
3.67
1.1057e-05
3.027e-08
d
yr
n .2688284111430464 2.2196e-09 deg/d
Q 2.878741771993497 1.5846e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      729  
   data-arc span      8201 days (22.45 yr)  
   first obs. used      1991-10-18  
   last obs. used      2014-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54987  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:53:12  

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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