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 ]  
379145 (2009 HP55)
Classification: Main-belt Asteroid          SPK-ID: 2379145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1389527436830507 9.4755e-08  
a 2.238079640657458 1.8639e-08 au
q 1.927092334006928 2.2115e-07 au
i 4.284759547540867 8.1991e-06 deg
node 220.6120832752155 9.0385e-05 deg
peri 64.98082363446464 9.5524e-05 deg
M 62.44437775376321 3.0078e-05 deg
tp 2458788.369764916451
(2019-Oct-31.86976492)
0.00010143 TDB
period 1222.95853329206
3.35
1.5277e-05
4.183e-08
d
yr
n .2943681164977216 3.6772e-09 deg/d
Q 2.549066947307988 2.1228e-08 au
  Orbit Determination Parameters
   # obs. used (total)      83  
   data-arc span      5703 days (15.61 yr)  
   first obs. used      2003-10-19  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59612  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:57:14  

Additional Information
 Earth MOID = .915512 au 
 Jupiter MOID = 2.58487 au 
 T_jup = 3.620 
[ 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 18.0   n/a MPO386490  

379145 (2009 HP55)          Discovered 2009-Apr-21 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-25 01:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin