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 ]  
154558 (2003 HR8)
Classification: Main-belt Asteroid          SPK-ID: 2154558
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216822094544563 4.3675e-08  
a 2.782457899643687 2.4113e-08 au
q 2.443882274701037 1.2204e-07 au
i 14.54223498180266 4.7975e-06 deg
node 107.4613801380686 1.9399e-05 deg
peri 169.6834574889711 2.7768e-05 deg
M 203.8630722773016 2.1584e-05 deg
tp 2459735.765957081688
(2022-Jun-05.26595708)
0.00010474 TDB
period 1695.279575498703
4.64
2.2037e-05
6.033e-08
d
yr
n .2123543545282779 2.7604e-09 deg/d
Q 3.121033524586337 2.7047e-08 au
  Orbit Determination Parameters
   # obs. used (total)      577  
   data-arc span      7061 days (19.33 yr)  
   first obs. used      1999-07-14  
   last obs. used      2018-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56632  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:52:37  

Additional Information
 Earth MOID = 1.42866 au 
 Jupiter MOID = 2.03936 au 
 T_jup = 3.275 
[ 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 15.1   n/a MPO417825  
diameter diameter 3.602 km 1.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.136   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

154558 (2003 HR8)          Discovered 2003-Apr-25 by LONEOS at Anderson Mesa
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-24 09:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin