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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01877709823604769 4.019e-08  
a 2.654982396819646 1.1587e-08 au
q 2.605129531539587 1.0922e-07 au
i 1.00015730624067 4.2842e-06 deg
node 162.6768902925378 0.00021336 deg
peri 228.5831069829686 0.00023663 deg
M 283.0075059444067 0.00010114 deg
tp 2458938.437808355006
(2020-Mar-29.93780835)		 0.00044386 TDB
period 1580.12300419776
4.33		 1.0344e-05
2.832e-08		 d
yr
n .2278303644992338 1.4915e-09 deg/d
Q 2.704835262099706 1.1805e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1321  
   data-arc span      9599 days (26.28 yr)  
   first obs. used      1993-08-15  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47467  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:19:05  

Additional Information
 Earth MOID = 1.60761 au 
 Jupiter MOID = 2.34839 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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