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187917 (2000 WH9)
Classification: Main-belt Asteroid          SPK-ID: 2187917
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2370863447301409 4.0378e-08  
a 2.804971719927449 2.4434e-08 au
q 2.139951227778433 1.2158e-07 au
i 8.599637935062853 6.4841e-06 deg
node 79.55919336542783 2.9776e-05 deg
peri 292.833018113329 3.3558e-05 deg
M 137.2188752791345 1.3726e-05 deg
tp 2458546.462707702717
(2019-Mar-03.96270770)
6.3207e-05 TDB
period 1715.896772569051
4.70
2.242e-05
6.138e-08
d
yr
n .209802830656885 2.7413e-09 deg/d
Q 3.469992212076464 3.0227e-08 au
  Orbit Determination Parameters
   # obs. used (total)      373  
   data-arc span      8864 days (24.27 yr)  
   first obs. used      1995-10-23  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4813  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 20:43:35  

Additional Information
 Earth MOID = 1.15707 au 
 Jupiter MOID = 2.0538 au 
 T_jup = 3.266 
[ 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 16.0   n/a MPO454295  
diameter diameter 3.720 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187917 (2000 WH9)          Discovered 2000-Nov-21 by Eskridge at Eskridge
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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