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70691 (1999 UH18)
Classification: Main-belt Asteroid          SPK-ID: 2070691
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1476358742770165 4.2194e-08  
a 2.413980784708917 1.0658e-08 au
q 2.057590621070498 1.013e-07 au
i 7.036146169460011 5.0748e-06 deg
node 42.48462984079543 3.2356e-05 deg
peri 286.5560873519119 3.7181e-05 deg
M 216.7922782404373 2.0241e-05 deg
tp 2459545.458053487502
(2021-Nov-26.95805349)
7.8484e-05 TDB
period 1369.932408986183
3.75
9.0723e-06
2.484e-08
d
yr
n .2627866876048414 1.7403e-09 deg/d
Q 2.770370948347337 1.2231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      902  
   data-arc span      7980 days (21.85 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56835  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:14:25  

Additional Information
 Earth MOID = 1.06032 au 
 Jupiter MOID = 2.58772 au 
 T_jup = 3.493 
[ 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 15.4   n/a MPO417316  

70691 (1999 UH18)          Discovered 1999-Oct-30 by Spacewatch at Kitt Peak
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UH18 = 1998 HC64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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