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6312 Robheinlein (1990 RH4)
Classification: Main-belt Asteroid          SPK-ID: 2006312
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07004142929825503 4.6531e-08  
a 2.1833183991052 1.3487e-08 AU
q 2.030395657818694 1.0168e-07 AU
i 4.115873430579835 6.3205e-06 deg
node 157.2552902039836 7.0033e-05 deg
peri 282.9628439758839 9.1335e-05 deg
M 108.0163815257751 5.323e-05 deg
tp 2456646.941597702018
(2013-Dec-20.44159770)
0.00017537 JED
period 1178.349274706091
3.23
1.0919e-05
2.989e-08
d
yr
n .3055121327161616 2.8309e-09 deg/d
Q 2.336241140391706 1.4432e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      11812 days (32.34 yr)  
   first obs. used      1982-01-21  
   last obs. used      2014-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49689  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:34:06  

Additional Information
 Earth MOID = 1.05042 AU 
 T_jup = 3.672 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO279581  

6312 Robheinlein           Discovered 1990 Sept. 14 by H. E. Holt at Palomar.
Missouri-born Robert A. Heinlein (1907-1988) was one of the most influential authors of science fiction. His By His Bootstraps (1941) is considered to be one of the best science-fiction stories ever published, exploring some of the inherent paradoxes that would be caused by time travel. The name was suggested by J. Meeus.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

[ show close-approach data ]
Alternate Designations
 1990 RH4 = 1982 BW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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