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JPL Small-Body Database Browser
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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310582846041821 3.4367e-08  
a 2.25947471615111 6.8276e-09 au
q 1.963351835745824 7.7706e-08 au
i 5.812806716020537 3.6496e-06 deg
node 165.14634038137 3.4337e-05 deg
peri 38.76662304299032 3.7112e-05 deg
M 275.6586265900056 1.6264e-05 deg
tp 2459291.134939929225
(2021-Mar-17.63493993)
5.6696e-05 TDB
period 1240.536810633945
3.40
5.6229e-06
1.539e-08
d
yr
n .2901969509603114 1.3154e-09 deg/d
Q 2.555597596556395 7.7224e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1951  
   data-arc span      24482 days (67.03 yr)  
   first obs. used      1953-04-07  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50886  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:47:51  

Additional Information
 Earth MOID = .964241 au 
 Jupiter MOID = 2.40477 au 
 T_jup = 3.603 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1906-Aug-02 05:32 < 00:01 Iris 0.0481574161557921 0.048149826070087 0.0481650065381184 7.9806094280326 7.98060941307459 2417424.730698297 0.458638780752055 423.136691665654 35.0286002172837 26.6686804974325 93539.8706688441 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48
1954-Mar-18 19:27 00:01 Thisb 0.0442018944126395 0.044197773961349 0.0442060148819199 4.2921296792997 4.29212964336111 2434820.310556407 1.1136712540838 210.177429130727 24.3690808100064 12.3699114060186 65716.7841411463 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48
1959-Jun-17 20:31 < 00:01 Iris 0.0445600319308737 0.0445554468694856 0.0445646169926258 7.33748400989336 7.33748399231087 2436737.354978782 0.219736752926987 228.684371205343 33.4244217666651 -1.58894933829168 29653.2101918316 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48
2018-Sep-07 08:45 < 00:01 Thisb 0.0370507845379213 0.03704923025251 0.0370523388237055 4.65662983413872 4.65662979461975 2458368.864699948 0.382095079228262 77.7315927010462 27.3608929790207 4.96040026590145 73135.0655494255 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48
2025-May-16 12:55 < 00:01 Hebe 0.0281616322446822 0.0281607252064385 0.0281625393378067 7.30377510522643 7.3037750750024 2460812.038460936 0.157504181771568 103.200032433287 33.6470412874813 -71.9585397253006 119697.199184326 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48
2155-Jan-17 04:50 00:05 Psych 0.0363404073192508 0.0363314326335355 0.0363493821355627 3.28430669399134 3.28430659261896 2508173.701453640 4.94282710030315 460.146403659007 30.9464523795349 13.7430003939701 43222.0598266479 T 31 CATAB v2.0f-lin.ifort 2020-May-20 02:48:06 2020-May-20 02:48

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