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 ]  
17389 (1981 EN30)
Classification: Main-belt Asteroid          SPK-ID: 2017389
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1830346400846183 3.7103e-08  
a 3.098756350850211 1.7347e-08 au
q 2.531576597462418 1.1687e-07 au
i 1.935895395188015 4.5206e-06 deg
node 58.82584759910267 0.00012423 deg
peri 278.6013386086073 0.00012485 deg
M 262.8114166121363 1.3033e-05 deg
tp 2459538.388578783689
(2021-Nov-19.88857878)
7.4306e-05 TDB
period 1992.413940116229
5.45
1.673e-05
4.58e-08
d
yr
n .1806853449233542 1.5172e-09 deg/d
Q 3.665936104238005 2.0522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1522  
   data-arc span      14233 days (38.97 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55036  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:03:20  

Additional Information
 Earth MOID = 1.52329 au 
 Jupiter MOID = 1.72528 au 
 T_jup = 3.196 
[ 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 13.3   n/a MPO435861  
diameter diameter 10.973 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17389 (1981 EN30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EN30 = 1998 HE64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-01 12:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin