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JPL Small-Body Database Browser
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136840 (1997 WN28)
Classification: Main-belt Asteroid          SPK-ID: 2136840
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396211643476665 4.7366e-08  
a 2.731145029611061 1.4209e-08 au
q 2.349819380574423 1.3246e-07 au
i 24.89150554614117 5.3875e-06 deg
node 234.8559687612347 1.1062e-05 deg
peri 141.9525416195503 2.4148e-05 deg
M 298.4908343787574 1.9172e-05 deg
tp 2458882.177985428077
(2020-Feb-02.67798543)
8.8146e-05 TDB
period 1648.60104555031
4.51
1.2865e-05
3.522e-08
d
yr
n .2183669608676188 1.7041e-09 deg/d
Q 3.1124706786477 1.6192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      820  
   data-arc span      10377 days (28.41 yr)  
   first obs. used      1991-06-03  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51207  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:05:14  

Additional Information
 Earth MOID = 1.38862 au 
 Jupiter MOID = 2.37792 au 
 T_jup = 3.207 
[ 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 15.0   n/a MPO401192  
diameter diameter 2.756 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136840 (1997 WN28)          Discovered 1997-Nov-30 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1997 WN28 = 2000 KA11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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