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
JPL Small-Body Database Browser
Search: [ help ]  
226675 (2004 HE18)
Classification: Main-belt Asteroid          SPK-ID: 2226675
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03202175984427834 5.7474e-08  
a 2.325499572950451 1.3843e-08 au
q 2.25103298410746 1.3653e-07 au
i 5.321302121329262 7.5442e-06 deg
node 212.7928426671951 4.9252e-05 deg
peri 311.0388525281373 0.0001099 deg
M 252.4527145585672 9.8154e-05 deg
tp 2459387.463297520492
(2021-Jun-21.96329752)
0.00035361 TDB
period 1295.307329567512
3.55
1.1566e-05
3.167e-08
d
yr
n .2779263204819507 2.4816e-09 deg/d
Q 2.399966161793442 1.4286e-08 au
  Orbit Determination Parameters
   # obs. used (total)      362  
   data-arc span      6280 days (17.19 yr)  
   first obs. used      2002-11-14  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 05:56:13  

Additional Information
 Earth MOID = 1.25963 au 
 Jupiter MOID = 2.57105 au 
 T_jup = 3.568 
[ 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 16.5   n/a MPO450051  

226675 (2004 HE18)          Discovered 2004-Apr-17 by LINEAR at Socorro
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-08 16:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin