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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1803100229011298 3.3248e-08  
a 2.429481937397057 9.9378e-09 au
q 1.991421993627113 8.4277e-08 au
i 1.908396832642805 3.5748e-06 deg
node 37.83760836031097 0.00014125 deg
peri 13.62398501364672 0.00014187 deg
M 10.01888017830879 1.4951e-05 deg
tp 2458962.006657796724
(2020-Apr-22.50665780)
5.7346e-05 TDB
period 1383.148909514013
3.79
8.4867e-06
2.324e-08
d
yr
n .2602756633965685 1.597e-09 deg/d
Q 2.867541881167002 1.173e-08 au
  Orbit Determination Parameters
   # obs. used (total)      922  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1997-12-29  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52417  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:52:47  

Additional Information
 Earth MOID = 1.00225 au 
 Jupiter MOID = 2.4994 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 15.5   n/a MPO449559  

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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