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JPL Small-Body Database Browser
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13971 (1991 UF1)
Classification: Main-belt Asteroid          SPK-ID: 2013971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .209162887435005 5.502e-08  
a 2.37898091265575 8.9529e-09 au
q 1.88138639581191 1.285e-07 au
i 3.401620175106917 4.8811e-06 deg
node 93.28920449007377 7.3314e-05 deg
peri 308.3423729431692 7.4274e-05 deg
M 284.275476084603 1.3195e-05 deg
tp 2459282.415473741235
(2021-Mar-08.91547374)
5.0083e-05 TDB
period 1340.247059991206
3.67
7.5657e-06
2.071e-08
d
yr
n .2686071924696944 1.5163e-09 deg/d
Q 2.87657542949959 1.0825e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1103  
   data-arc span      10166 days (27.83 yr)  
   first obs. used      1991-10-18  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5242  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:32  

Additional Information
 Earth MOID = .892238 au 
 Jupiter MOID = 2.53322 au 
 T_jup = 3.507 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456516.5 (2013-Aug-12.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2101121667157587 5.519e-08  
q 1.877940535116492 1.2917e-07 au
tp 2456604.355184767767
(2013-Nov-07.85518477)
4.2382e-05 TDB
node 93.31862606000853 7.3306e-05 deg
peri 308.5226852053793 7.4244e-05 deg
i 3.40276749749935 4.8828e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1103  
   data-arc span      10166 days (27.83 yr)  
   first obs. used      1991-10-18  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5242  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:32  

Additional Information
 Jupiter MOID = 2.53322 au 
 T_jup = 3.507 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.04595864014079E-15 -7.120047538456194E-15 4.093521940128657E-13 -1.121672744381973E-14 -6.130394636803712E-14 -2.414682878106622E-15
q -7.120047538456194E-15 1.668450713567413E-14 -8.701692644622404E-13 2.639320359402313E-14 1.648256540812455E-13 5.65227992532366E-15
tp 4.093521940128657E-13 -8.701692644622404E-13 1.796263977263921E-9 2.511052212981655E-12 4.960600581861382E-10 -1.306003399948429E-12
node -1.121672744381973E-14 2.639320359402313E-14 2.511052212981655E-12 5.373829077138237E-9 -5.362110349829294E-9 -1.078780820778508E-11
peri -6.130394636803712E-14 1.648256540812455E-13 4.960600581861382E-10 -5.362110349829294E-9 5.512158539784523E-9 1.05592133838686E-11
i -2.414682878106622E-15 5.65227992532366E-15 -1.306003399948429E-12 -1.078780820778508E-11 1.05592133838686E-11 2.384187763755099E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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