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 ]  
312571 (2009 HR41)
Classification: Main-belt Asteroid          SPK-ID: 2312571
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 .04203434262178747 5.0808e-08  
a 2.542315573656182 2.6903e-08 au
q 2.435451009780411 1.3506e-07 au
i 4.970099473411038 5.2746e-06 deg
node 148.1293430671819 6.0032e-05 deg
peri 3.99260354494812 8.7895e-05 deg
M 226.0168678472429 6.6985e-05 deg
tp 2459151.549025956716
(2020-Oct-29.04902596)
0.00027857 TDB
period 1480.616598201654
4.05
2.3502e-05
6.434e-08
d
yr
n .2431419453471299 3.8594e-09 deg/d
Q 2.649180137531952 2.8034e-08 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      4881 days (13.36 yr)  
   first obs. used      2005-04-02  
   last obs. used      2018-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62369  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 10:53:24  

Additional Information
 Earth MOID = 1.44617 au 
 Jupiter MOID = 2.32726 au 
 T_jup = 3.438 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457176.5 (2015-Jun-03.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04126373241633273 5.1214e-08  
q 2.437453858610918 1.3581e-07 au
tp 2457675.887085962580
(2016-Oct-14.38708596)
0.00027353 TDB
node 148.1670906256514 5.9978e-05 deg
peri 5.208057572904125 8.8335e-05 deg
i 4.971850808450931 5.2776e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      4881 days (13.36 yr)  
   first obs. used      2005-04-02  
   last obs. used      2018-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62369  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 10:53:24  

Additional Information
 Jupiter MOID = 2.32726 au 
 T_jup = 3.438 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.622894406523488E-15 -6.83057874964885E-15 2.823902701528096E-12 3.171809005425775E-14 5.875239610576641E-13 -3.200807040824602E-15
q -6.83057874964885E-15 1.844386031285228E-14 -5.143633575624851E-12 -7.930400995664678E-14 -1.047704070249136E-12 9.186592748288227E-15
tp 2.823902701528096E-12 -5.143633575624851E-12 7.481915581747071E-8 1.959301452317361E-10 1.775727079112662E-8 -3.702936622134197E-12
node 3.171809005425775E-14 -7.930400995664678E-14 1.959301452317361E-10 3.597358327787549E-9 -3.536961995552218E-9 6.361383595124075E-11
peri 5.875239610576641E-13 -1.047704070249136E-12 1.775727079112662E-8 -3.536961995552218E-9 7.803040993728964E-9 -6.426002044613216E-11
i -3.200807040824602E-15 9.186592748288227E-15 -3.702936622134197E-12 6.361383595124075E-11 -6.426002044613216E-11 2.785316044196636E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.8   n/a MPO455304  
diameter diameter 2.468 km 0.667 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

312571 (2009 HR41)          Discovered 2009-Apr-20 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 01:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin