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18191 Rayhe (2000 QL90)
Classification: Main-belt Asteroid          SPK-ID: 2018191
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03774944028639291 3.1918e-08  
a 2.783466442635616 1.2859e-08 au
q 2.678392142370164 9.3152e-08 au
i 3.675891789679772 4.9787e-06 deg
node 215.8795536596 5.532e-05 deg
peri 231.8768032270546 9.2307e-05 deg
M 352.3617697976279 7.3197e-05 deg
tp 2459036.488823868461
(2020-Jul-05.98882387)
0.00034492 TDB
period 1696.201377725206
4.64
1.1754e-05
3.218e-08
d
yr
n .2122389503555291 1.4707e-09 deg/d
Q 2.888540742901068 1.3344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      13600 days (37.23 yr)  
   first obs. used      1982-11-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51903  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:09  

Additional Information
 Earth MOID = 1.69648 au 
 Jupiter MOID = 2.1928 au 
 T_jup = 3.328 
[ 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 13.9   n/a MPO502307  
diameter diameter 10.857 km 0.392 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.045   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18191 Rayhe           Discovered 2000 Aug. 25 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ray Chengchuan He (b. 1984) was awarded second place in the 2003 Intel International Science and Engineering Fair for his physics project. He attends the Hempfield High School, Landisville, Pennsylvania, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 2000 QL90 = 1982 VA8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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