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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456808.5 (2014-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01991398941125973 3.8065e-08  
q 2.602862732639265 1.0252e-07 au
tp 2457336.529258128826
(2015-Nov-10.02925813)
0.00040765 TDB
node 162.6663379331199 0.00020863 deg
peri 223.8506789816099 0.00022886 deg
i .999270551280761 4.0381e-06 deg
  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
 Jupiter MOID = 2.34603 au 
 T_jup = 3.388 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.448940492732853E-15 -3.881655744596715E-15 -2.539309998741675E-12 7.702171307864071E-15 -5.981674592221705E-13 -5.853092415121089E-17
q -3.881655744596715E-15 1.051127610085212E-14 6.36923925211614E-12 -2.10657555244929E-14 1.49473645834892E-12 1.791884109019577E-16
tp -2.539309998741675E-12 6.36923925211614E-12 1.661802541825956E-7 -7.37332282941331E-11 3.835725103767084E-8 -6.565617846082847E-13
node 7.702171307864071E-15 -2.10657555244929E-14 -7.37332282941331E-11 4.352852366982924E-8 -4.35385960594185E-8 1.682532827018627E-10
peri -5.981674592221705E-13 1.49473645834892E-12 3.835725103767084E-8 -4.35385960594185E-8 5.237613192540573E-8 -1.683831458783879E-10
i -5.853092415121089E-17 1.791884109019577E-16 -6.565617846082847E-13 1.682532827018627E-10 -1.683831458783879E-10 1.630637111869006E-11

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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