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90994 (1997 YH18)
Classification: Main-belt Asteroid          SPK-ID: 2090994
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1801575739845135 5.3986e-08  
a 2.429564764741163 1.6485e-08 au
q 1.99186027088714 1.3666e-07 au
i 1.912901049658555 5.8813e-06 deg
node 37.88488759256219 0.00017282 deg
peri 12.86927723164136 0.00017362 deg
M 6.570752734890869 1.9494e-05 deg
tp 2457575.253349302728
(2016-Jul-05.75334930)
7.476e-05 JED
period 1383.219642820572
3.79
1.4078e-05
3.854e-08
d
yr
n .2602623537545427 2.6489e-09 deg/d
Q 2.867269258595186 1.9455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      6535 days (17.89 yr)  
   first obs. used      1997-12-03  
   last obs. used      2015-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5032  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 18:50:38  

Additional Information
 Earth MOID = 1.00093 au 
 Jupiter MOID = 2.50582 au 
 T_jup = 3.485 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO299528  

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 | Physical Parameters | Discovery Circumstances ]
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