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 ]  
295337 (2008 HB9)
Classification: Jupiter Trojan          SPK-ID: 2295337
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09241650056747402 1.2457e-07  
a 5.190938461825987 2.3051e-07 au
q 4.711210094522923 6.6027e-07 au
i 31.59462080327012 1.6073e-05 deg
node 198.2628430911314 1.3654e-05 deg
peri 149.6738944355205 6.5619e-05 deg
M 221.1625603224967 6.9038e-05 deg
tp 2460266.485982106965
(2023-Nov-17.98598211)
0.00090609 TDB
period 4319.835881096915
11.83
0.00028774
7.878e-07
d
yr
n .08333649932751309 5.551e-09 deg/d
Q 5.670666829129051 2.5181e-07 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      6434 days (17.62 yr)  
   first obs. used      2001-10-15  
   last obs. used      2019-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6492  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:42:57  

Additional Information
 Earth MOID = 3.73417 au 
 Jupiter MOID = .122114 au 
 T_jup = 2.697 
[ 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 13.5   n/a MPO450204  

295337 (2008 HB9)          Discovered 2008-Apr-24 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

Alternate Designations
 2008 HB9 = 2007 EJ174 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin