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7542 Johnpond (1953 GN)
Classification: Main-belt Asteroid          SPK-ID: 2007542
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310582854340276 3.4579e-08  
a 2.259474716234951 6.8513e-09 au
q 1.963351833943662 7.8132e-08 au
i 5.812807119621725 3.7038e-06 deg
node 165.1463415319495 3.436e-05 deg
peri 38.76662158873096 3.7144e-05 deg
M 275.6586268502529 1.6272e-05 deg
tp 2459291.134939048606
(2021-Mar-17.63493905)
5.6718e-05 TDB
period 1240.536810702993
3.40
5.6424e-06
1.545e-08
d
yr
n .2901969509441591 1.3199e-09 deg/d
Q 2.55559759852624 7.7492e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1917  
   data-arc span      24403 days (66.81 yr)  
   first obs. used      1953-04-07  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:32:06  

Additional Information
 Earth MOID = .964241 au 
 Jupiter MOID = 2.40477 au 
 T_jup = 3.603 
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Orbital Elements at Epoch 2456745.5 (2014-Mar-29.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309313197612657 3.4611e-08  
q 1.963281781819424 7.8173e-08 au
tp 2456810.576664446536
(2014-Jun-02.07666445)
5.2074e-05 TDB
node 165.1779954534656 3.4349e-05 deg
peri 38.80235867760619 3.7136e-05 deg
i 5.813671102834894 3.7049e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1917  
   data-arc span      24403 days (66.81 yr)  
   first obs. used      1953-04-07  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:32:06  

Additional Information
 Jupiter MOID = 2.40477 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.197908195494735E-15 -2.697796337523164E-15 -1.492492365883888E-13 -1.372401551223538E-15 -3.258618207628372E-14 1.744399896098123E-15
q -2.697796337523164E-15 6.111050088921999E-15 4.383122636562979E-13 2.778606977392746E-15 1.002727709115342E-13 -3.915129025474143E-15
tp -1.492492365883888E-13 4.383122636562979E-13 2.711704186212866E-9 -1.224032120075093E-11 7.469018681915202E-10 -2.60010884861228E-13
node -1.372401551223538E-15 2.778606977392746E-15 -1.224032120075093E-11 1.1798417466031E-9 -1.176566926891209E-9 2.133724756290059E-11
peri -3.258618207628372E-14 1.002727709115342E-13 7.469018681915202E-10 -1.176566926891209E-9 1.379075296495659E-9 -2.12669270091063E-11
i 1.744399896098123E-15 -3.915129025474143E-15 -2.60010884861228E-13 2.133724756290059E-11 -2.12669270091063E-11 1.372611594445877E-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 14.3   n/a MPO347585  
diameter diameter 3.952 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.259   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7542 Johnpond           Discovered 1953 Apr. 7 by K. Reinmuth at Heidelberg.
John Pond (1767-1836), sixth Astronomer Royal, is famous for the introduction of then-modern transit instruments at Greenwich Observatory and for publishing a high-precision star catalogue. Pond received the Copley Medal of the Royal Society. The name was suggested by L. D. Schmadel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

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Alternate Designations
 1953 GN = 1991 PX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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