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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04366014301353779 4.0073e-08  
a 3.08812761668921 2.6685e-08 au
q 2.953299523300503 1.2101e-07 au
i 7.434222902459856 3.9622e-06 deg
node 249.5715291476906 4.2927e-05 deg
peri 35.01589733368191 9.8891e-05 deg
M 106.6697576888685 8.4075e-05 deg
tp 2458809.172827915839
(2019-Nov-21.67282792)
0.0004668 TDB
period 1982.171765750271
5.43
2.5692e-05
7.034e-08
d
yr
n .1816189727955975 2.3541e-09 deg/d
Q 3.222955710077916 2.785e-08 au
  Orbit Determination Parameters
   # obs. used (total)      778  
   data-arc span      7727 days (21.16 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-12-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52714  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:55  

Additional Information
 Earth MOID = 1.94034 au 
 Jupiter MOID = 1.84993 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 14.44   n/a E2021B10  

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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