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91844 (1999 UR2)
Classification: Main-belt Asteroid          SPK-ID: 2091844
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04421471112562888 4.4991e-08  
a 3.090312662798052 2.9369e-08 au
q 2.953675381124564 1.4248e-07 au
i 7.433969310658072 5.4831e-06 deg
node 249.5908047033252 4.3064e-05 deg
peri 35.67310723269716 9.8015e-05 deg
M 34.06947445114393 8.3628e-05 deg
tp 2458812.713229752358
(2019-Nov-25.21322975)
0.00046214 TDB
period 1984.275906166233
5.43
2.8286e-05
7.744e-08
d
yr
n .1814263827330073 2.5863e-09 deg/d
Q 3.226949944471541 3.0667e-08 au
  Orbit Determination Parameters
   # obs. used (total)      604  
   data-arc span      7601 days (20.81 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56035  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:20:19  

Additional Information
 Earth MOID = 1.94106 au 
 Jupiter MOID = 1.85018 au 
 T_jup = 3.211 
[ 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 14.3   n/a MPO436414  

91844 (1999 UR2)          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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