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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804762692927229 7.7033e-08  
a 2.429483635571847 1.7628e-08 AU
q 1.991019492716119 1.8742e-07 AU
i 1.913026899382353 7.6732e-06 deg
node 37.8919209588935 0.00017907 deg
peri 12.90636803286048 0.00018014 deg
M 210.4053926951599 1.9465e-05 deg
tp 2457575.255096959748
(2016-Jul-05.75509696)
7.7111e-05 JED
period 1383.150359717644
3.79
1.5054e-05
4.122e-08
d
yr
n .2602753905030905 2.8328e-09 deg/d
Q 2.867947778427575 2.081e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      606  
   data-arc span      6050 days (16.56 yr)  
   first obs. used      1997-12-03  
   last obs. used      2014-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51331  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 16:51:10  

Additional Information
 Earth MOID = 1.00131 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 (327)
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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