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15622 Westrich (2000 HY20)
Classification: Main-belt Asteroid          SPK-ID: 2015622
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06207554974348656 3.3625e-08  
a 2.254367113977033 6.4507e-09 au
q 2.114426036053271 7.6533e-08 au
i 3.688374237751568 3.8327e-06 deg
node 150.0859835939752 5.1262e-05 deg
peri 64.51833008046525 5.9231e-05 deg
M 38.62272208446967 2.9769e-05 deg
tp 2459067.859617415100
(2020-Aug-06.35961741)
0.00010223 TDB
period 1236.332789442734
3.38
5.3065e-06
1.453e-08
d
yr
n .2911837355395765 1.2498e-09 deg/d
Q 2.394308191900794 6.8511e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1612  
   data-arc span      9974 days (27.31 yr)  
   first obs. used      1993-03-20  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46988  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:04:17  

Additional Information
 Earth MOID = 1.10982 au 
 Jupiter MOID = 2.56769 au 
 T_jup = 3.619 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.09   n/a E2021B10  
diameter diameter 2.406 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.335   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15622 Westrich           Discovered 2000 Apr. 27 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Named in honor of Bradford J. Westrich for achievement as a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Bradford is a student at the Edgewood Middle School, Moriarty, New Mexico.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011002/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 2000 HY20 = 1994 PQ23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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