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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01919357319344224 3.7369e-08  
a 2.655781325660866 1.0828e-08 au
q 2.604807392401017 1.0065e-07 au
i 1.000105784448401 4.0361e-06 deg
node 162.6663978004588 0.0002085 deg
peri 229.3110417338815 0.00023112 deg
M 58.99101541825517 9.8241e-05 deg
tp 2458941.457950738767
(2020-Apr-01.95795074)		 0.00043152 TDB
period 1580.836286218346
4.33		 9.6676e-06
2.647e-08		 d
yr
n .2277275661866206 1.3927e-09 deg/d
Q 2.706755258920714 1.1035e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1462  
   data-arc span      10019 days (27.43 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46006  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:00:44  

Additional Information
 Earth MOID = 1.60694 au 
 Jupiter MOID = 2.34603 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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