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79837 (1998 WB21)
Classification: Main-belt Asteroid          SPK-ID: 2079837
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2193848317666348 4.8607e-08  
a 2.391915470432455 1.0345e-08 au
q 1.867165497351619 1.1639e-07 au
i 3.382178545782486 5.4009e-06 deg
node 24.55789754140502 7.6401e-05 deg
peri 324.7368983149942 7.7057e-05 deg
M 340.364625153612 1.2992e-05 deg
tp 2459074.197688103526
(2020-Aug-12.69768810)
4.9069e-05 TDB
period 1351.192321248198
3.70
8.7657e-06
2.4e-08
d
yr
n .2664313542482546 1.7284e-09 deg/d
Q 2.91666544351329 1.2614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      9996 days (27.37 yr)  
   first obs. used      1993-03-21  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56733  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:36:54  

Additional Information
 Earth MOID = .862339 au 
 Jupiter MOID = 2.5124 au 
 T_jup = 3.496 
[ 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 15.8   n/a MPO280277  
diameter diameter 1.854 km 0.284 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.270   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

79837 (1998 WB21)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1998 WB21 = 1997 HW10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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