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6544 Stevendick (1986 SD)
Classification: Main-belt Asteroid          SPK-ID: 2006544
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1098002670871496 3.7184e-08  
a 2.769503916675792 1.1623e-08 au
q 2.465411646925884 1.0449e-07 au
i 3.385890977203345 4.0362e-06 deg
node 340.9197330156346 6.0073e-05 deg
peri 22.94940772451952 6.2197e-05 deg
M 110.1121130080095 1.6185e-05 deg
tp 2458485.586832028745
(2019-Jan-02.08683203)
7.5496e-05 TDB
period 1683.454575575787
4.61
1.0597e-05
2.901e-08
d
yr
n .2138459838614121 1.3462e-09 deg/d
Q 3.073596186425701 1.2899e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2475  
   data-arc span      24084 days (65.94 yr)  
   first obs. used      1954-11-23  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:34:55  

Additional Information
 Earth MOID = 1.46335 au 
 Jupiter MOID = 2.3761 au 
 T_jup = 3.327 
[ 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 13.0   n/a MPO502216  

6544 Stevendick           Discovered 1986 Sept. 29 by Z. Vavrova at Klet.
Steven J. Dick (b. 1949), president of IAU Commission 41 (1997-2000), wrote the official history of the U.S. Naval Observatory and books on the history of the extraterrestrial life debate. At the USNO (1979-2003) he was astronomer, historian and Nautical Almanac Office chief. He has been chief historian of NASA since 2003.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090607/MPCPages.arcLast Updated: 2009-06-08

Alternate Designations
 1986 SD = 1972 RG4 = 1972 TY10 = 1994 JT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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