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90994 (1997 YH18)
Classification: Main-belt Asteroid          SPK-ID: 2090994
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180551636715455 2.5852e-08  
a 2.429605964975957 8.0283e-09 au
q 1.990936631425916 6.34e-08 au
i 1.908405832707401 3.1803e-06 deg
node 37.82919640790241 0.00013679 deg
peri 13.60414449107626 0.00013744 deg
M 113.083370140869 1.456e-05 deg
tp 2458961.991339793428
(2020-Apr-22.49133979)
5.518e-05 TDB
period 1383.254827650682
3.79
6.8562e-06
1.877e-08
d
yr
n .2602557336535189 1.29e-09 deg/d
Q 2.868275298525998 9.4778e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      8584 days (23.50 yr)  
   first obs. used      1997-12-29  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50269  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:39:30  

Additional Information
 Earth MOID = 1.00127 au 
 Jupiter MOID = 2.50054 au 
 T_jup = 3.485 
[ 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 15.56   n/a MPO637237  

90994 (1997 YH18)          Discovered 1997-Dec-29 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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