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 ]  
441434 (2008 HE4)
Classification: Main-belt Asteroid          SPK-ID: 2441434
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812430915089649 1.1103e-07  
a 3.084850028816282 5.021e-08 au
q 2.5257422727521 3.1649e-07 au
i 17.69706977337138 7.7087e-06 deg
node 70.63565897774428 2.521e-05 deg
peri 110.4819024845046 3.2771e-05 deg
M 135.7761546589046 2.0256e-05 deg
tp 2458454.101919084615
(2018-Dec-01.60191908)
0.00010666 TDB
period 1979.016932719682
5.42
4.8317e-05
1.323e-07
d
yr
n .1819084991381386 4.4412e-09 deg/d
Q 3.643957784880465 5.931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      2002-02-08  
   last obs. used      2020-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55384  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:40:50  

Additional Information
 Earth MOID = 1.58745 au 
 Jupiter MOID = 1.60109 au 
 T_jup = 3.130 
[ 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 16.41   n/a E2021B25  

441434 (2008 HE4)          Discovered 2008-Mar-30 by CSS at Catalina
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2008 HE4 = 2013 CX180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-18 02:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin