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46939 (1998 SM73)
Classification: Main-belt Asteroid          SPK-ID: 2046939
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1226243314184186 3.646e-08  
a 2.723533991342478 1.5693e-08 au
q 2.38956245655877 9.8531e-08 au
i 5.393207026926754 5.0226e-06 deg
node 164.7248090494901 4.1078e-05 deg
peri 302.2895344562568 4.5643e-05 deg
M 221.8694748173497 2.0083e-05 deg
tp 2459630.419117464356
(2022-Feb-19.91911746)
9.2412e-05 TDB
period 1641.714472505686
4.49
1.4189e-05
3.885e-08
d
yr
n .2192829545143413 1.8953e-09 deg/d
Q 3.057505526126187 1.7617e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1039  
   data-arc span      10483 days (28.70 yr)  
   first obs. used      1989-09-29  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:39:58  

Additional Information
 Earth MOID = 1.41149 au 
 Jupiter MOID = 2.06537 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456637.5 (2013-Dec-11.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .122142807980576 3.5947e-08  
q 2.390153836364325 9.6844e-08 au
tp 2456338.825346355289
(2013-Feb-15.32534636)
9.2129e-05 TDB
node 164.9840177361863 4.1139e-05 deg
peri 300.5799171089349 4.5834e-05 deg
i 5.388885388373593 5.0201e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1039  
   data-arc span      10483 days (28.70 yr)  
   first obs. used      1989-09-29  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:39:58  

Additional Information
 Jupiter MOID = 2.06537 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.292222091007339E-15 -3.448615971687112E-15 6.434439632869471E-13 3.366431552932978E-15 1.346613990105604E-13 7.510628438476576E-16
q -3.448615971687112E-15 9.378749344533784E-15 -1.842977131926642E-12 -8.783650376869826E-15 -3.806024106945251E-13 -1.721376195737533E-15
tp 6.434439632869471E-13 -1.842977131926642E-12 8.487720916708454E-9 1.905969123727258E-12 1.874695552308776E-9 -1.793760724464567E-13
node 3.366431552932978E-15 -8.783650376869826E-15 1.905969123727258E-12 1.692429875936433E-9 -1.684052139524145E-9 7.48901041993978E-12
peri 1.346613990105604E-13 -3.806024106945251E-13 1.874695552308776E-9 -1.684052139524145E-9 2.100744752439394E-9 -7.472847332340694E-12
i 7.510628438476576E-16 -1.721376195737533E-15 -1.793760724464567E-13 7.48901041993978E-12 -7.472847332340694E-12 2.520165932530445E-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 14.7   n/a MPO302329  

46939 (1998 SM73)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SM73 = 1989 TH4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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