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9530 Kelleymichael (1981 EO26)
Classification: Main-belt Asteroid          SPK-ID: 2009530
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04929773216681955 3.2837e-08  
a 2.880609329248737 1.1915e-08 au
q 2.738601822058191 9.4259e-08 au
i .8940153266525435 3.7358e-06 deg
node 292.3749234723664 0.00025532 deg
peri 140.4705273910436 0.00025954 deg
M 146.7545678621795 4.5438e-05 deg
tp 2458472.528967210008
(2018-Dec-20.02896721)
0.00022533 TDB
period 1785.767731948982
4.89
1.1079e-05
3.033e-08
d
yr
n .2015939663144753 1.2507e-09 deg/d
Q 3.022616836439283 1.2502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1742  
   data-arc span      25331 days (69.35 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52291  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:26:13  

Additional Information
 Earth MOID = 1.75279 au 
 Jupiter MOID = 2.11117 au 
 T_jup = 3.292 
[ 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 14.15   n/a E2021B10  

9530 Kelleymichael           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Michael Sean Peterson Kelley (b. 1978) is an assistant research scientist at the University of Maryland. He has contributed to an improved understanding of the size, structure, and mineralogy of comet dust through both telescopic measurements and dynamical models.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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