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JPL Small-Body Database Browser
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12140 Johnbolton (4087 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012140
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105997354107279 3.7107e-08  
a 2.48210053108077 8.8341e-09 au
q 2.20758086908041 9.1784e-08 au
i 2.014445795212446 4.1679e-06 deg
node 2.628603086885914 9.3102e-05 deg
peri 156.1481376761536 9.4492e-05 deg
M 212.3971349180268 1.6083e-05 deg
tp 2459186.125211255936
(2020-Dec-02.62521126)
6.468e-05 TDB
period 1428.326448372479
3.91
7.6254e-06
2.088e-08
d
yr
n .2520432219190546 1.3456e-09 deg/d
Q 2.756620193081131 9.8112e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1586  
   data-arc span      21623 days (59.20 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48419  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:22:33  

Additional Information
 Earth MOID = 1.21709 au 
 Jupiter MOID = 2.22388 au 
 T_jup = 3.468 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO358747  
diameter diameter 6.129 km 0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 66.830 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.057   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12140 Johnbolton           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
John G. Bolton (1922-1993) was a pioneer radio astronomer in Australia who used interferometry with direct and sea-reflected signals to identify the first radio sources with optical objects. He directed two major radio observatories.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

Alternate Designations
 4087 P-L = 1993 BJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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