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 ]  
91034 (1998 EH21)
Classification: Inner Main-belt Asteroid          SPK-ID: 2091034
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06626782730366619 6.423e-08  
a 1.900075434743485 9.5593e-09 au
q 1.774161563969965 1.1903e-07 au
i 21.92911763985353 7.0481e-06 deg
node 162.3373779996877 1.3578e-05 deg
peri 200.9356170762861 4.5825e-05 deg
M 330.4871489795692 4.6547e-05 deg
tp 2459078.926594367732
(2020-Aug-17.42659437)
0.00012392 TDB
period 956.6535592524865
2.62
7.2194e-06
1.977e-08
d
yr
n .3763117761055508 2.8398e-09 deg/d
Q 2.025989305517005 1.0193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      490  
   data-arc span      7738 days (21.19 yr)  
   first obs. used      1998-03-01  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57418  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:06  

Additional Information
 Earth MOID = .772955 au 
 Jupiter MOID = 3.19547 au 
 T_jup = 3.857 
[ 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 MPO309817  

91034 (1998 EH21)          Discovered 1998-Mar-01 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-20 18:51 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin