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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06218306309565337 3.7167e-08  
a 2.254699889442532 8.0047e-09 au
q 2.114495743955564 8.2775e-08 au
i 3.6878774739195 3.9098e-06 deg
node 150.0917530411515 6.3242e-05 deg
peri 64.21102528730913 7.1744e-05 deg
M 224.2208034149122 3.5812e-05 deg
tp 2459066.904010329693
(2020-Aug-05.40401033)
0.00012384 TDB
period 1236.606549026597
3.39
6.5854e-06
1.803e-08
d
yr
n .2911192733722593 1.5503e-09 deg/d
Q 2.3949040349295 8.5025e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1301  
   data-arc span      9758 days (26.72 yr)  
   first obs. used      1993-03-20  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48885  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:01:20  

Additional Information
 Earth MOID = 1.11117 au 
 Jupiter MOID = 2.56907 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 15.1   n/a MPO458970  
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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