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91845 (1999 UT2)
Classification: Main-belt Asteroid          SPK-ID: 2091845
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1032471539737506 3.7836e-08  
a 3.069705902887432 2.2584e-08 au
q 2.752767504877883 1.2033e-07 au
i 11.34511720984815 4.8258e-06 deg
node 40.06294252450679 2.1664e-05 deg
peri 89.68488836496465 3.2754e-05 deg
M 216.1078818926898 2.6293e-05 deg
tp 2459785.696012792933
(2022-Jul-25.19601279)
0.0001477 TDB
period 1964.461767076423
5.38
2.1679e-05
5.935e-08
d
yr
n .1832563025829533 2.0223e-09 deg/d
Q 3.386644300896982 2.4915e-08 au
  Orbit Determination Parameters
   # obs. used (total)      833  
   data-arc span      7682 days (21.03 yr)  
   first obs. used      1999-10-10  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5795  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:38:17  

Additional Information
 Earth MOID = 1.79729 au 
 Jupiter MOID = 1.75472 au 
 T_jup = 3.193 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO436414  

91845 (1999 UT2)          Discovered 1999-Oct-19 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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