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 ]  
324821 (2007 HR81)
Classification: Main-belt Asteroid          SPK-ID: 2324821
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04477725421277728 5.6769e-08  
a 2.966697425089196 4.6038e-08 au
q 2.833856860313585 1.6916e-07 au
i 4.832322669378168 7.8477e-06 deg
node 36.82983624036001 7.3665e-05 deg
peri 243.1545506653652 0.00011511 deg
M 62.92684335434689 8.9037e-05 deg
tp 2458274.256584947626
(2018-Jun-04.75658495)
0.00046025 TDB
period 1866.41539855251
5.11
4.3445e-05
1.189e-07
d
yr
n .1928831064505771 4.4898e-09 deg/d
Q 3.099537989864807 4.8099e-08 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      5884 days (16.11 yr)  
   first obs. used      2002-05-03  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56763  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 09:13:39  

Additional Information
 Earth MOID = 1.82128 au 
 Jupiter MOID = 1.95381 au 
 T_jup = 3.257 
[ 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 16.3   n/a MPO455395  
diameter diameter 3.358 km 0.612 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

324821 (2007 HR81)          Discovered 2007-Apr-25 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20120406/Numbers.arcLast Updated: 2012-04-09

[ show close-approach data ]
Alternate Designations
 2007 HR81 = 2004 VJ66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-20 20:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin