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 ]  
359276 (2009 HR4)
Classification: Main-belt Asteroid          SPK-ID: 2359276
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03528994403805295 6.4824e-08  
a 2.607020129740819 2.4594e-08 au
q 2.515018535256188 1.5955e-07 au
i 3.175053908056156 4.7176e-06 deg
node 121.5302592593446 0.00014654 deg
peri 170.6375948676273 0.0001877 deg
M 46.6977538720535 0.00011817 deg
tp 2458401.061731640884
(2018-Oct-09.56173164)
0.00050453 TDB
period 1537.499572377707
4.21
2.1757e-05
5.957e-08
d
yr
n .2341464065861614 3.3134e-09 deg/d
Q 2.69902172422545 2.5462e-08 au
  Orbit Determination Parameters
   # obs. used (total)      128  
   data-arc span      6727 days (18.42 yr)  
   first obs. used      2001-05-29  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62228  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 11:15:28  

Additional Information
 Earth MOID = 1.49821 au 
 Jupiter MOID = 2.35071 au 
 T_jup = 3.409 
[ 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 17.4   n/a MPO353168  

359276 (2009 HR4)          Discovered 2009-Apr-17 by Spacewatch at Kitt Peak
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

Alternate Designations
 2009 HR4 = 2006 QX74 
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