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 ]  
120782 (1998 EM12)
Classification: Main-belt Asteroid          SPK-ID: 2120782
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08263501075569289 4.0711e-08  
a 2.669015468165294 1.5878e-08 au
q 2.448461346246344 1.0331e-07 au
i 21.85375995803845 7.0319e-06 deg
node 3.467016845475511 1.0392e-05 deg
peri 103.7797683207427 4.3912e-05 deg
M 87.30887113200346 4.1592e-05 deg
tp 2458614.238933570945
(2019-May-10.73893357)
0.00018393 TDB
period 1592.667298426323
4.36
1.4212e-05
3.891e-08
d
yr
n .2260359086644823 2.0171e-09 deg/d
Q 2.889569590084243 1.719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-03-01  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5354  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:49  

Additional Information
 Earth MOID = 1.54405 au 
 Jupiter MOID = 2.22871 au 
 T_jup = 3.274 
[ 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 14.68   n/a E2021B55  

120782 (1998 EM12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 EM12 = 2000 QA138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Feb-28 16:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin