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 ]  
17384 (1981 EM12)
Classification: Outer Main-belt Asteroid          SPK-ID: 2017384
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07496835336952264 4.1928e-08  
a 3.202011472068365 3.2477e-08 au
q 2.961961944537078 1.3638e-07 au
i 15.67013003513712 6.1151e-06 deg
node 339.6370443811065 1.6261e-05 deg
peri 293.9014158163861 4.2931e-05 deg
M 225.3718269025169 4.108e-05 deg
tp 2459783.147502863762
(2022-Jul-22.64750286)
0.0002407 TDB
period 2092.824217609632
5.73
3.184e-05
8.717e-08
d
yr
n .1720163580729119 2.617e-09 deg/d
Q 3.442060999599652 3.4911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      486  
   data-arc span      15488 days (42.40 yr)  
   first obs. used      1977-09-08  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57026  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:03:20  

Additional Information
 Earth MOID = 1.98695 au 
 Jupiter MOID = 1.84981 au 
 T_jup = 3.131 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO425975  
diameter diameter 6.399 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17384 (1981 EM12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-29 14:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin