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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07004143091961183 4.6392e-08  
a 2.183318398353797 1.3165e-08 AU
q 2.030395653579983 1.0117e-07 AU
i 4.115872836631882 6.2271e-06 deg
node 157.2552934084882 6.9855e-05 deg
peri 282.9628465978065 9.0161e-05 deg
M 108.0163763703707 5.1965e-05 deg
tp 2456646.941614759168
(2013-Dec-20.44161476)
0.00017113 JED
period 1178.349274097787
3.23
1.0658e-05
2.918e-08
d
yr
n .3055121328738774 2.7633e-09 deg/d
Q 2.336241143127612 1.4087e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1100  
   data-arc span      12056 days (33.01 yr)  
   first obs. used      1982-01-21  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49763  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:03:14  

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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