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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 | Close-Approach Data ]

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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .20463922555379 3.5454e-08  
a 2.400257618740647 1.0182e-08 au
q 1.909070758511976 8.6201e-08 au
i 2.976979518522218 4.7825e-06 deg
node 69.45136660801521 7.8503e-05 deg
peri 276.9347610009618 7.9465e-05 deg
M 144.7246532804486 1.3897e-05 deg
tp 2458454.459030337069
(2018-Dec-01.95903034)
5.1133e-05 TDB
period 1358.26719652063
3.72
8.6427e-06
2.366e-08
d
yr
n .2650435797331959 1.6865e-09 deg/d
Q 2.891444478969317 1.2266e-08 au
  Orbit Determination Parameters
   # obs. used (total)      958  
   data-arc span      14110 days (38.63 yr)  
   first obs. used      1981-09-01  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:26:38  

Additional Information
 Earth MOID = .904897 au 
 Jupiter MOID = 2.52834 au 
 T_jup = 3.496 
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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 15.3   n/a MPO449019  

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

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