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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230077214039189 3.1331e-08  
a 2.722103672172898 1.2551e-08 au
q 2.38726390203367 8.702e-08 au
i 5.395261878438248 4.3611e-06 deg
node 164.7213302596543 3.1825e-05 deg
peri 302.490523845289 3.6242e-05 deg
M 265.5554408758651 1.8916e-05 deg
tp 2459630.857981474493
(2022-Feb-20.35798147)
8.7285e-05 TDB
period 1640.421372788493
4.49
1.1345e-05
3.106e-08
d
yr
n .2194558093254106 1.5178e-09 deg/d
Q 3.056943442312127 1.4095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1306  
   data-arc span      11374 days (31.14 yr)  
   first obs. used      1989-09-29  
   last obs. used      2020-11-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52968  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:53:52  

Additional Information
 Earth MOID = 1.40904 au 
 Jupiter MOID = 2.06494 au 
 T_jup = 3.341 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457475.5 (2016-Mar-28.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216444989368192 3.069e-08  
q 2.392788178197522 8.5109e-08 au
tp 2457981.512008090068
(2017-Aug-16.01200809)
8.5441e-05 TDB
node 164.9691859329138 3.1875e-05 deg
peri 300.7809796432481 3.649e-05 deg
i 5.388969313251047 4.3563e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1306  
   data-arc span      11374 days (31.14 yr)  
   first obs. used      1989-09-29  
   last obs. used      2020-11-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52968  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:53:52  

Additional Information
 Jupiter MOID = 2.06494 au 
 T_jup = 3.341 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.418872312713901E-16 -2.589929197172816E-15 6.803834451455477E-13 1.39234812683545E-15 1.598357798359045E-13 7.899251574169102E-16
q -2.589929197172816E-15 7.243619481674675E-15 -1.57446579993323E-12 -4.045065874900675E-15 -3.86797579052798E-13 -1.959527395658519E-15
tp 6.803834451455477E-13 -1.57446579993323E-12 7.300241752014385E-9 -1.291387725048298E-13 1.522896721263091E-9 -4.82164920009833E-14
node 1.39234812683545E-15 -4.045065874900675E-15 -1.291387725048298E-13 1.015999926700087E-9 -1.011186855794443E-9 -8.293894259666079E-12
peri 1.598357798359045E-13 -3.86797579052798E-13 1.522896721263091E-9 -1.011186855794443E-9 1.331496325830983E-9 8.227612694876395E-12
i 7.899251574169102E-16 -1.959527395658519E-15 -4.82164920009833E-14 -8.293894259666079E-12 8.227612694876395E-12 1.897710709079026E-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 14.73   n/a E2021B10  

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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