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10870 Gwendolen (1996 SY4)
Classification: Main-belt Asteroid          SPK-ID: 2010870
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2049860576856324 3.4731e-08  
a 2.399522926600254 9.736e-09 au
q 1.907654181550176 8.4904e-08 au
i 2.977128571798187 4.186e-06 deg
node 69.44128534036567 7.2827e-05 deg
peri 276.9870317299523 7.3684e-05 deg
M 249.6543262985114 1.3848e-05 deg
tp 2459812.639165928318
(2022-Aug-21.13916593)
5.3632e-05 TDB
period 1357.643618538834
3.72
8.2629e-06
2.262e-08
d
yr
n .2651653166443272 1.6139e-09 deg/d
Q 2.891391671650331 1.1732e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1049  
   data-arc span      14504 days (39.71 yr)  
   first obs. used      1981-09-01  
   last obs. used      2021-05-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:26:44  

Additional Information
 Earth MOID = .902678 au 
 Jupiter MOID = 2.5291 au 
 T_jup = 3.496 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457286.5 (2015-Sep-21.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2058580599652714 3.4889e-08  
q 1.905437118992754 8.5411e-08 au
tp 2457094.756680422181
(2015-Mar-13.25668042)
4.5641e-05 TDB
node 69.49810021998823 7.2915e-05 deg
peri 276.5636822201186 7.3752e-05 deg
i 2.976562624668425 4.1825e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1049  
   data-arc span      14504 days (39.71 yr)  
   first obs. used      1981-09-01  
   last obs. used      2021-05-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:26:44  

Additional Information
 Jupiter MOID = 2.5291 au 
 T_jup = 3.496 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.217216494982724E-15 -2.967977691305522E-15 -2.185491570100561E-13 7.344290670430946E-15 -3.136895014932731E-14 1.911786143716176E-16
q -2.967977691305522E-15 7.295118789446491E-15 6.379087476754077E-13 -1.859682124800472E-14 1.03145125867246E-13 -3.234339145690063E-16
tp -2.185491570100561E-13 6.379087476754077E-13 2.083074486490246E-9 -8.691283883540921E-12 5.187296775493158E-10 9.908276994592628E-13
node 7.344290670430946E-15 -1.859682124800472E-14 -8.691283883540921E-12 5.316579477511328E-9 -5.3110274081468E-9 -1.188457696283145E-11
peri -3.136895014932731E-14 1.03145125867246E-13 5.187296775493158E-10 -5.3110274081468E-9 5.43933173724299E-9 1.210432648238084E-11
i 1.911786143716176E-16 -3.234339145690063E-16 9.908276994592628E-13 -1.188457696283145E-11 1.210432648238084E-11 1.749368709509324E-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 15.40   n/a MPO636230  

10870 Gwendolen           Discovered 1996 Sept. 25 by G. C. L. Aikman at the Dominion Astrophysical Observatory, Victoria.
Mary Gwendolen Ellery Read Aikman (1903-1994) was an inspiring educator and mother of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1996 SY4 = 1981 RL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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