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523858 (1995 UL21)
Classification: Main-belt Asteroid          SPK-ID: 2523858
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07236852842736871 8.4284e-08  
a 2.771758447587804 2.8581e-08 au
q 2.571170367579747 2.2604e-07 au
i 6.237158491803 7.2919e-06 deg
node 19.01388922072221 6.2684e-05 deg
peri 306.5714165030233 8.0397e-05 deg
M 172.7690898767829 5.539e-05 deg
tp 2458191.599616561569
(2018-Mar-14.09961656)
0.00025546 TDB
period 1685.510632981392
4.61
2.607e-05
7.138e-08
d
yr
n .2135851254543669 3.3036e-09 deg/d
Q 2.972346527595861 3.0649e-08 au
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      8866 days (24.27 yr)  
   first obs. used      1995-10-19  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61395  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 18:43:20  

Additional Information
 Earth MOID = 1.56587 au 
 Jupiter MOID = 2.27708 au 
 T_jup = 3.325 
[ 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 16.7   n/a MPO441653  

523858 (1995 UL21)          Discovered 1995-Oct-19 by Spacewatch at Kitt Peak
Reference: Last Updated: 2019-05-29

Alternate Designations
 1995 UL21 = 2004 SG8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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