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JPL Small-Body Database Browser
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39539 Emmadesmet (1991 GU4)
Classification: Main-belt Asteroid          SPK-ID: 2039539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08337877867717793 3.8835e-08  
a 3.050840144335986 1.7827e-08 au
q 2.796464819161947 1.1922e-07 au
i 9.147377477727051 4.5165e-06 deg
node 15.82434110102623 2.6119e-05 deg
peri 130.4395058170346 3.6698e-05 deg
M 210.8231300730715 2.6447e-05 deg
tp 2459807.041270667794
(2022-Aug-15.54127067)
0.0001451 TDB
period 1946.379874994232
5.33
1.706e-05
4.671e-08
d
yr
n .1849587558035488 1.6212e-09 deg/d
Q 3.305215469510026 1.9314e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      10425 days (28.54 yr)  
   first obs. used      1991-04-08  
   last obs. used      2019-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50731  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:29:13  

Additional Information
 Earth MOID = 1.81739 au 
 Jupiter MOID = 1.70196 au 
 T_jup = 3.212 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456772.5 (2014-Apr-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07975362149202769 3.9069e-08  
q 2.811094885254137 1.1958e-07 au
tp 2455909.442882559415
(2011-Dec-13.94288256)
0.00014466 TDB
node 15.97238480812708 2.6043e-05 deg
peri 130.4066005442343 3.7415e-05 deg
i 9.159007835779375 4.52e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      10425 days (28.54 yr)  
   first obs. used      1991-04-08  
   last obs. used      2019-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50731  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:29:13  

Additional Information
 Jupiter MOID = 1.70196 au 
 T_jup = 3.212 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.526424749198704E-15 -4.627419920163666E-15 6.21535646492264E-13 2.090534630563898E-15 1.244932984834455E-13 3.444867865091929E-16
q -4.627419920163666E-15 1.430045065092617E-14 -1.710434652279102E-12 -3.319624376440807E-15 -3.263425177506004E-13 8.523639585973722E-17
tp 6.21535646492264E-13 -1.710434652279102E-12 2.092735311140802E-8 4.273996419775974E-12 3.90615135167726E-9 -1.42904971884789E-12
node 2.090534630563898E-15 -3.319624376440807E-15 4.273996419775974E-12 6.782183579929929E-10 -6.679390477982925E-10 -6.511787342254819E-12
peri 1.244932984834455E-13 -3.263425177506004E-13 3.90615135167726E-9 -6.679390477982925E-10 1.399880895334908E-9 6.319205957720935E-12
i 3.444867865091929E-16 8.523639585973722E-17 -1.42904971884789E-12 -6.511787342254819E-12 6.319205957720935E-12 2.043014045464507E-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 13.3   n/a MPO351108  

39539 Emmadesmet           Discovered 1991 Apr. 8 by E. W. Elst at the European Southern Observatory.
Emma de Smet (2005) is the second granddaughter of the discoverer, and daughter of Mayré and Robby.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-03-16Last Updated: 2014-03-21

[ show close-approach data ]
Alternate Designations
 1991 GU4 = 1996 DO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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