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 ]  
56224 (1999 JE12)
Classification: Main-belt Asteroid          SPK-ID: 2056224
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2765020167376027 4.1267e-08  
a 2.582643606138321 1.5112e-08 au
q 1.868537440526601 1.023e-07 au
i 29.3992772732119 7.0764e-06 deg
node 190.1129197580185 8.4302e-06 deg
peri 97.83059705776701 1.7303e-05 deg
M 269.2575016908875 1.7935e-05 deg
tp 2458982.623174846109
(2020-May-13.12317485)
7.7739e-05 TDB
period 1515.985844647887
4.15
1.3306e-05
3.643e-08
d
yr
n .2374692357919847 2.0842e-09 deg/d
Q 3.296749771750042 1.929e-08 au
  Orbit Determination Parameters
   # obs. used (total)      942  
   data-arc span      11558 days (31.64 yr)  
   first obs. used      1987-09-18  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54097  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:09:05  

Additional Information
 Earth MOID = 1.06452 au 
 Jupiter MOID = 2.45366 au 
 T_jup = 3.194 
[ 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 14.2   n/a MPO474445  
diameter diameter 4.865 km 1.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56224 (1999 JE12)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JE12 = 1987 SZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-21 00:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin