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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01919357428100533 3.7152e-08  
a 2.655781326496116 1.078e-08 au
q 2.604807390331906 9.9976e-08 au
i 1.000105723325765 4.0156e-06 deg
node 162.6663974702473 0.00020794 deg
peri 229.3110412771225 0.0002306 deg
M 58.99101618941209 9.8201e-05 deg
tp 2458941.457947230250
(2020-Apr-01.95794723)
0.00043134 TDB
period 1580.836286964113
4.33
9.6247e-06
2.635e-08
d
yr
n .2277275660791891 1.3865e-09 deg/d
Q 2.706755262660327 1.0987e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1488  
   data-arc span      10078 days (27.59 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:59:00  

Additional Information
 Earth MOID = 1.60694 au 
 Jupiter MOID = 2.34603 au 
 T_jup = 3.388 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456823.5 (2014-Jun-15.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01990770114864757 3.7846e-08  
q 2.602894504026718 1.0184e-07 au
tp 2457336.494824305116
(2015-Nov-09.99482431)
0.00040773 TDB
node 162.6662542061624 0.00020807 deg
peri 223.8414471261336 0.00022835 deg
i .9992708242674788 4.0176e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1488  
   data-arc span      10078 days (27.59 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:59:00  

Additional Information
 Jupiter MOID = 2.34603 au 
 T_jup = 3.388 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.432352474934725E-15 -3.833407905397762E-15 -2.513931179646514E-12 7.485760501198044E-15 -5.930916575616787E-13 -5.809670488560533E-17
q -3.833407905397762E-15 1.037097048152096E-14 6.294629841093623E-12 -2.044597053685141E-14 1.479794146430676E-12 1.776765604855821E-16
tp -2.513931179646514E-12 6.294629841093623E-12 1.662421232882137E-7 -7.362626757384512E-11 3.837247987961345E-8 -6.642748810989076E-13
node 7.485760501198044E-15 -2.044597053685141E-14 -7.362626757384512E-11 4.329406850934058E-8 -4.330416331629025E-8 1.620410690749845E-10
peri -5.930916575616787E-13 1.479794146430676E-12 3.837247987961345E-8 -4.330416331629025E-8 5.214544601191166E-8 -1.621735888041607E-10
i -5.809670488560533E-17 1.776765604855821E-16 -6.642748810989076E-13 1.620410690749845E-10 -1.621735888041607E-10 1.614098148562178E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.54   n/a MPCxxxxx  
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

Alternate Designations
 1998 WZ21 = 1993 PP8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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