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 ]  
18339 (1989 GM2)
Classification: Main-belt Asteroid          SPK-ID: 2018339
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1671655670645553 3.891e-08  
a 2.700012621393018 1.0064e-08 au
q 2.248663480456397 1.0355e-07 au
i 6.076150798385479 5.0628e-06 deg
node 216.6749759229256 3.3044e-05 deg
peri 297.1787774027652 3.5958e-05 deg
M 87.68830423871765 1.3133e-05 deg
tp 2458805.782583962790
(2019-Nov-18.28258396)
5.8914e-05 TDB
period 1620.492846874484
4.44
9.0604e-06
2.481e-08
d
yr
n .2221546369021918 1.2421e-09 deg/d
Q 3.151361762329638 1.1746e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1653  
   data-arc span      11425 days (31.28 yr)  
   first obs. used      1989-04-03  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48732  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:57  

Additional Information
 Earth MOID = 1.26604 au 
 Jupiter MOID = 1.88444 au 
 T_jup = 3.340 
[ 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 14.19   n/a E2021B10  
diameter diameter 6.943 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18339 (1989 GM2)          Discovered 1989-Apr-03 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 GM2 = 1998 KN15 
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-23 15:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin