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 ]  
74506 (1999 EJ4)
Classification: Main-belt Asteroid          SPK-ID: 2074506
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1760501691235364 4.0933e-08  
a 2.817511524922168 1.6072e-08 au
q 2.321488144452108 1.1528e-07 au
i 4.600425558937479 4.9118e-06 deg
node 351.9870483009209 5.7476e-05 deg
peri 69.00938846895112 5.9079e-05 deg
M 182.8324054489001 1.36e-05 deg
tp 2459450.617128431985
(2021-Aug-24.11712843)		 6.7772e-05 TDB
period 1727.416162142699
4.73		 1.478e-05
4.047e-08		 d
yr
n .2084037465259405 1.7832e-09 deg/d
Q 3.313534905392229 1.8901e-08 au
   Orbit Determination Parameters
   # obs. used (total)      975  
   data-arc span      7827 days (21.43 yr)  
   first obs. used      1997-11-30  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55873  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:41:35  

Additional Information
 Earth MOID = 1.33862 au 
 Jupiter MOID = 2.04867 au 
 T_jup = 3.291 
[ 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 14.3   n/a MPO347992  

74506 (1999 EJ4)          Discovered 1999-Mar-12 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 EJ4 = 2001 OU45 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-19 10:40 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin