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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 ]

[ show orbit diagram ]
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

[ hide close-approach data ]
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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