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152655 (1997 WL18)
Classification: Main-belt Asteroid          SPK-ID: 2152655
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1241481830072647 4.8056e-08  
a 2.428560102706789 1.7758e-08 au
q 2.127058778631805 1.1585e-07 au
i 4.138527700562415 5.8223e-06 deg
node 275.0966443056959 8.912e-05 deg
peri 62.6635586937988 9.3727e-05 deg
M 92.05014345108445 3.15e-05 deg
tp 2458847.037227445807
(2019-Dec-29.53722745)
0.00011913 TDB
period 1382.361757938253
3.78
1.5162e-05
4.151e-08
d
yr
n .260423870909832 2.8565e-09 deg/d
Q 2.730061426781773 1.9963e-08 au
  Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      8497 days (23.26 yr)  
   first obs. used      1997-11-06  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53216  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 19:28:04  

Additional Information
 Earth MOID = 1.11953 au 
 Jupiter MOID = 2.61396 au 
 T_jup = 3.495 
[ 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 16.4   n/a MPO436771  
diameter diameter 2.985 km 0.834 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

152655 (1997 WL18)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Alternate Designations
 1997 WL18 = 2001 XJ229 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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