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7012 Hobbes (1988 CH2)
Classification: Main-belt Asteroid          SPK-ID: 2007012
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1319448523575109 4.7014e-08  
a 2.311873722920201 6.8159e-09 au
q 2.006833885880286 1.0914e-07 au
i 7.186559886006792 4.1948e-06 deg
node 132.7546994047151 3.1687e-05 deg
peri 239.1666767249857 3.4011e-05 deg
M 166.4685054022886 1.2316e-05 deg
tp 2458406.790265671075
(2018-Oct-15.29026567)
4.375e-05 TDB
period 1283.939588704173
3.52
5.678e-06
1.555e-08
d
yr
n .2803870237877258 1.24e-09 deg/d
Q 2.616913559960116 7.7152e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3007  
   data-arc span      25606 days (70.11 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41868  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:36:52  

Additional Information
 Earth MOID = 1.01674 au 
 Jupiter MOID = 2.85833 au 
 T_jup = 3.562 
[ 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 13.6   n/a MPO452267  
diameter diameter 4.666 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.938 h n/a LCDB (Rev. 2019-August); 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 0.351   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7012 Hobbes           Discovered 1988 Feb. 11 by E. W. Elst at the European Southern Observatory.
Named in memory of the great British political philosopher Thomas Hobbes (1588-1679). In 1651 he published his masterpiece Leviathan, wherein he insisted that the first requirement of political and moral institutions is that they should provide citizens with security. He analyzed the conditions for peace and security and gave a recipe for constructing an ideal state: men can only live together in peace if they agree to subject themselves to an absolute and individual sovereign. He made a severe attack on the attempt of papists and presbyterians to challenge the rights of this sovereign. Citation prepared by S. Elst at the request of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19961224/MPCPages.arcLast Updated: 2003-09-26

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Alternate Designations
 1988 CH2 = 1969 VN2 = 1976 UZ3 
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