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49371 (1998 WZ21)
Classification: Main-belt Asteroid          SPK-ID: 2049371
[ 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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01899198666412913 3.9871e-08  
a 2.655178980500163 1.1379e-08 au
q 2.604751856711628 1.0842e-07 au
i 1.000127071944433 4.2586e-06 deg
node 162.6744397313611 0.00021188 deg
peri 229.0176424249854 0.00023475 deg
M 13.72814726049192 9.978e-05 deg
tp 2458940.237303958339
(2020-Mar-31.73730396)		 0.00043802 TDB
period 1580.298503748767
4.33		 1.0159e-05
2.781e-08		 d
yr
n .2278050628700919 1.4644e-09 deg/d
Q 2.705606104288698 1.1595e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      9931 days (27.19 yr)  
   first obs. used      1993-08-15  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47146  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:33:00  

Additional Information
 Earth MOID = 1.60821 au 
 Jupiter MOID = 2.34729 au 
 T_jup = 3.388 
[ 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 14.5   n/a MPO347861  
diameter diameter 3.304 km 0.599 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.281   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49371 (1998 WZ21)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WZ21 = 1993 PP8 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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