Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070711018433192 3.485e-08  
a 2.462100698246338 1.0075e-08 au
q 2.198480863635897 8.5573e-08 au
i 6.432692566908866 4.0948e-06 deg
node 172.623984974902 3.4155e-05 deg
peri 91.51651238952144 3.9438e-05 deg
M 218.6089305900131 1.9966e-05 deg
tp 2459554.712889824106
(2021-Dec-06.21288982)
7.9186e-05 TDB
period 1411.097894437353
3.86
8.6613e-06
2.371e-08
d
yr
n .2551204997322618 1.5659e-09 deg/d
Q 2.72572053285678 1.1154e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1184  
   data-arc span      9406 days (25.75 yr)  
   first obs. used      1994-04-03  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55274  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:40:34  

Additional Information
 Earth MOID = 1.19451 au 
 Jupiter MOID = 2.34611 au 
 T_jup = 3.473 
[ show covariance matrix ]

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 14.9   n/a MPO452339  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-17 13:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin