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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08337877826315489 3.8735e-08  
a 3.050840143780596 1.7772e-08 au
q 2.796464819915983 1.1898e-07 au
i 9.147377297149795 4.5146e-06 deg
node 15.82433951497125 2.5976e-05 deg
peri 130.4395077612847 3.6554e-05 deg
M 210.8231299043881 2.6421e-05 deg
tp 2459807.041271359560
(2022-Aug-15.54127136)
0.00014498 TDB
period 1946.379874462739
5.33
1.7008e-05
4.657e-08
d
yr
n .184958755854055 1.6162e-09 deg/d
Q 3.305215467645211 1.9254e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1679  
   data-arc span      10710 days (29.32 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 03:34:56  

Additional Information
 Earth MOID = 1.81739 au 
 Jupiter MOID = 1.70196 au 
 T_jup = 3.212 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456793.5 (2014-May-16.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07976025738505627 3.8973e-08  
q 2.811064762085176 1.1936e-07 au
tp 2455909.484020027441
(2011-Dec-13.98402003)
0.00014437 TDB
node 15.97163925321417 2.59e-05 deg
peri 130.4129403299428 3.7268e-05 deg
i 9.159061213198987 4.5181e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1679  
   data-arc span      10710 days (29.32 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 03:34:56  

Additional Information
 Jupiter MOID = 1.70196 au 
 T_jup = 3.212 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.518917003586125E-15 -4.607402463751856E-15 6.441110838883143E-13 2.185292125253597E-15 1.288225367313675E-13 3.406376471652786E-16
q -4.607402463751856E-15 1.424639259258523E-14 -1.768226604935276E-12 -3.706148040136015E-15 -3.372399312303216E-13 9.167732102697753E-17
tp 6.441110838883143E-13 -1.768226604935276E-12 2.084297780264281E-8 5.459596293470079E-12 3.888263428349014E-9 -1.359823961206489E-12
node 2.185292125253597E-15 -3.706148040136015E-15 5.459596293470079E-12 6.708291192552692E-10 -6.604253180378773E-10 -6.747184820486433E-12
peri 1.288225367313675E-13 -3.372399312303216E-13 3.888263428349014E-9 -6.604253180378773E-10 1.388929307243884E-9 6.565161740583723E-12
i 3.406376471652786E-16 9.167732102697753E-17 -1.359823961206489E-12 -6.747184820486433E-12 6.565161740583723E-12 2.041303364406313E-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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