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 ]  
18438 (1994 JM6)
Classification: Main-belt Asteroid          SPK-ID: 2018438
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02125496457188049 3.5522e-08  
a 2.718206153147452 1.258e-08 au
q 2.660430777663236 9.6021e-08 au
i 6.00304839513704 3.858e-06 deg
node 58.66181644419655 4.4546e-05 deg
peri 20.64592096371264 0.00013994 deg
M 123.8306119250165 0.00013045 deg
tp 2458637.449262039186
(2019-Jun-02.94926204)
0.00059389 TDB
period 1636.899491287611
4.48
1.1364e-05
3.111e-08
d
yr
n .2199279808663257 1.5268e-09 deg/d
Q 2.775981528631669 1.2848e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1191  
   data-arc span      15415 days (42.20 yr)  
   first obs. used      1978-11-29  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51858  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:18  

Additional Information
 Earth MOID = 1.67534 au 
 Jupiter MOID = 2.26547 au 
 T_jup = 3.352 
[ 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 14.53   n/a E2021B10  

18438 (1994 JM6)          Discovered 1994-May-04 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 JM6 = 1978 WB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-19 20:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin