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12140 Johnbolton (4087 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012140
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .110164321215717 5.953e-08  
a 2.482224272868342 1.4005e-08 au
q 2.208771720742624 1.4532e-07 au
i 2.016126622561401 5.9322e-06 deg
node 2.659710647637386 0.00013124 deg
peri 156.5173112606261 0.00013299 deg
M 269.5896824368604 2.2562e-05 deg
tp 2457759.236401980416
(2017-Jan-05.73640198)
9.0779e-05 JED
period 1428.433260648144
3.91
1.2089e-05
3.31e-08
d
yr
n .2520243751791749 2.1329e-09 deg/d
Q 2.75567682499406 1.5547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      20169 days (55.22 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48073  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:19:47  

Additional Information
 Earth MOID = 1.21779 au 
 Jupiter MOID = 2.22707 au 
 T_jup = 3.468 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0 mag n/a MPO358747  
rotation period rot_per 66.8295 h n/a LCDB (Rev. 2015-December); 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.]

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 | Physical Parameters | Discovery Circumstances ]
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