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91860 (1999 UL18)
Classification: Main-belt Asteroid          SPK-ID: 2091860
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .117147746160894 6.8809e-08  
a 2.918290875966964 1.5859e-08 au
q 2.576419677205533 1.9959e-07 au
i 2.85185131841817 3.7337e-06 deg
node 85.4349796168899 9.7186e-05 deg
peri 298.3132437873301 9.958e-05 deg
M 123.7643056030685 1.9192e-05 deg
tp 2458770.485775372004
(2019-Oct-13.98577537)
9.712e-05 TDB
period 1820.921789751397
4.99
1.4843e-05
4.064e-08
d
yr
n .1977020660778349 1.6116e-09 deg/d
Q 3.260162074728395 1.7717e-08 au
  Orbit Determination Parameters
   # obs. used (total)      718  
   data-arc span      10539 days (28.85 yr)  
   first obs. used      1992-04-26  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4964  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:41:41  

Additional Information
 Earth MOID = 1.58079 au 
 Jupiter MOID = 2.19074 au 
 T_jup = 3.269 
[ 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 15.46   n/a MPCxxxxx  

91860 (1999 UL18)          Discovered 1999-Oct-30 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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