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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1035154722202365 3.7358e-08  
a 3.069166850561177 2.2164e-08 au
q 2.75146059470264 1.1936e-07 au
i 11.34603423766384 4.7914e-06 deg
node 40.05791309237039 2.0871e-05 deg
peri 89.70728556683481 3.2145e-05 deg
M 252.7685519616837 2.6366e-05 deg
tp 2459785.490542626609
(2022-Jul-24.99054263)
0.00014709 TDB
period 1963.944339074188
5.38
2.1274e-05
5.825e-08
d
yr
n .183304583962754 1.9856e-09 deg/d
Q 3.386873106419713 2.4459e-08 au
  Orbit Determination Parameters
   # obs. used (total)      866  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-02-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57997  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:48:03  

Additional Information
 Earth MOID = 1.79591 au 
 Jupiter MOID = 1.7538 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 14.57   n/a E2021B10  

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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