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85771 (1998 UR4)
Classification: Main-belt Asteroid          SPK-ID: 2085771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1635333305538568 4.1258e-08  
a 2.634076382334124 1.3789e-08 au
q 2.20331709859777 1.0427e-07 au
i 13.09398916527181 3.7859e-06 deg
node 165.6936201754955 1.9785e-05 deg
peri 226.980486204137 2.4604e-05 deg
M 76.81723844735573 1.2538e-05 deg
tp 2459063.306007049534
(2020-Aug-01.80600705)
5.4749e-05 TDB
period 1561.496350124218
4.28
1.2262e-05
3.357e-08
d
yr
n .2305480893191724 1.8104e-09 deg/d
Q 3.064835666070477 1.6044e-08 au
  Orbit Determination Parameters
   # obs. used (total)      852  
   data-arc span      8213 days (22.49 yr)  
   first obs. used      1998-08-17  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:26:57  

Additional Information
 Earth MOID = 1.22751 au 
 Jupiter MOID = 2.45061 au 
 T_jup = 3.343 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.36   n/a MPCxxxxx  

85771 (1998 UR4)          Discovered 1998-Oct-20 by ODAS at Caussols
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 UR4 = 2000 AP202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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