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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1032471659432846 4.1938e-08  
a 3.069705919440926 2.5963e-08 au
q 2.752767482979326 1.3141e-07 au
i 11.34511908368648 5.8159e-06 deg
node 40.06294930933841 2.4522e-05 deg
peri 89.68490277354897 3.8255e-05 deg
M 216.1078550088099 2.8742e-05 deg
tp 2459785.696165845213
(2022-Jul-25.19616585)
0.00015916 TDB
period 1964.461782966564
5.38
2.4923e-05
6.824e-08
d
yr
n .1832563011006294 2.325e-09 deg/d
Q 3.386644355902527 2.8644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      695  
   data-arc span      6796 days (18.61 yr)  
   first obs. used      1999-10-10  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59884  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:41:16  

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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