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11980 Ellis (1995 SP8)
Classification: Main-belt Asteroid          SPK-ID: 2011980
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070290802417694 3.0872e-08  
a 2.46188633205945 9.1075e-09 au
q 2.198392902279344 7.7475e-08 au
i 6.433343874681798 3.9041e-06 deg
node 172.6193212338023 3.0963e-05 deg
peri 91.58967151045158 3.6103e-05 deg
M 269.5551108192594 1.8653e-05 deg
tp 2459554.972014085772
(2021-Dec-06.47201409)
7.3534e-05 TDB
period 1410.913609677476
3.86
7.8293e-06
2.144e-08
d
yr
n .2551538219850989 1.4159e-09 deg/d
Q 2.725379761839557 1.0082e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      9843 days (26.95 yr)  
   first obs. used      1994-04-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54139  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:03:51  

Additional Information
 Earth MOID = 1.19271 au 
 Jupiter MOID = 2.34553 au 
 T_jup = 3.473 
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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 14.89   n/a E2021B10  

11980 Ellis           Discovered 1995 Sept. 17 by Spacewatch at Kitt Peak.
Kerry Ellis (b. 1965) wrote a thesis at the University of Western Ontario in electrical engineering and specialized in meteor burst communication.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1995 SP8 = 1998 HW90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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