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 ]  
305954 (2009 HQ39)
Classification: Main-belt Asteroid          SPK-ID: 2305954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .148816170766336 4.2541e-08  
a 2.530775574440136 2.1882e-08 au
q 2.15415524438298 1.1241e-07 au
i 2.859469833646608 4.4052e-06 deg
node 145.7319248811762 0.00016007 deg
peri 19.72163698301589 0.00016234 deg
M 222.9511259459873 3.0592e-05 deg
tp 2459160.324433578118
(2020-Nov-06.82443358)
0.00012744 TDB
period 1470.546894159044
4.03
1.9072e-05
5.222e-08
d
yr
n .2448068820041756 3.175e-09 deg/d
Q 2.907395904497291 2.5138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      5311 days (14.54 yr)  
   first obs. used      2005-05-14  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59084  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 21:14:33  

Additional Information
 Earth MOID = 1.16226 au 
 Jupiter MOID = 2.06642 au 
 T_jup = 3.434 
[ 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 16.6   n/a MPO455254  

305954 (2009 HQ39)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HQ39 = 2006 QP86 = 2009 KD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-06 23:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin