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 ]  
295558 (2008 SM55)
Classification: Jupiter Trojan          SPK-ID: 2295558
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09046245809885128 7.5336e-08  
a 5.151173038567822 1.6689e-07 au
q 4.685185263406447 4.5621e-07 au
i 15.34430946128143 1.1136e-05 deg
node 199.6145552411374 2.4507e-05 deg
peri 105.9902085980097 8.5313e-05 deg
M 30.27287098795975 7.355e-05 deg
tp 2458241.405507220763
(2018-May-02.90550722)
0.00087968 TDB
period 4270.292614530708
11.69
0.00020753
5.682e-07
d
yr
n .08430335634963575 4.097e-09 deg/d
Q 5.617160813729196 1.8199e-07 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1995-07-28  
   last obs. used      2019-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53336  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:01:15  

Additional Information
 Earth MOID = 3.71137 au 
 Jupiter MOID = .0580877 au 
 T_jup = 2.921 
[ 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 13.7   n/a MPO413252  

295558 (2008 SM55)          Discovered 2008-Sep-20 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-16 00:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin