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 ]  
441371 (2008 EH21)
Classification: Main-belt Asteroid          SPK-ID: 2441371
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1560457234512603 5.0676e-08  
a 2.248504290109183 1.6888e-08 au
q 1.897634811475834 1.179e-07 au
i 1.636467461857366 6.4049e-06 deg
node 278.4573738655004 0.00020639 deg
peri 307.8329183036669 0.00020805 deg
M 252.9111599139735 2.6887e-05 deg
tp 2459566.836946798284
(2021-Dec-18.33694680)
9.4661e-05 TDB
period 1231.513019857528
3.37
1.3875e-05
3.799e-08
d
yr
n .2923233406347973 3.2934e-09 deg/d
Q 2.599373768742533 1.9524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      5177 days (14.17 yr)  
   first obs. used      2006-11-16  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55004  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:40:35  

Additional Information
 Earth MOID = .887379 au 
 Jupiter MOID = 2.3856 au 
 T_jup = 3.612 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457679.5 (2016-Oct-18.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1561622747915965 5.072e-08  
q 1.897255301426578 1.1798e-07 au
tp 2457104.667149236438
(2015-Mar-23.16714924)
7.9021e-05 TDB
node 278.4842187451096 0.00020657 deg
peri 307.9306266170721 0.00020822 deg
i 1.635565352865235 6.4031e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      5177 days (14.17 yr)  
   first obs. used      2006-11-16  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55004  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:40:35  

Additional Information
 Jupiter MOID = 2.3856 au 
 T_jup = 3.612 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.572554793093326E-15 -5.942718928553797E-15 -2.701715971358471E-13 -5.43013195403506E-15 -7.478785614042708E-14 -1.062076137593532E-15
q -5.942718928553797E-15 1.392039707421714E-14 1.098941711839117E-12 7.935669516608311E-15 3.482216735016352E-13 2.626305141163064E-15
tp -2.701715971358471E-13 1.098941711839117E-12 6.24428178464311E-9 -2.047631392403347E-11 2.090033064008484E-9 1.376915039861939E-12
node -5.43013195403506E-15 7.935669516608311E-15 -2.047631392403347E-11 4.267155292167124E-8 -4.266119722703994E-8 2.142117086440629E-10
peri -7.478785614042708E-14 3.482216735016352E-13 2.090033064008484E-9 -4.266119722703994E-8 4.335694860615554E-8 -2.136647737132257E-10
i -1.062076137593532E-15 2.626305141163064E-15 1.376915039861939E-12 2.142117086440629E-10 -2.136647737132257E-10 4.099909288238758E-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 17.9   n/a MPO437716  

441371 (2008 EH21)          Discovered 2008-Mar-02 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-23 08:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin