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 ]  
39970 (1998 GM9)
Classification: Main-belt Asteroid          SPK-ID: 2039970
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06828350307993895 4.7689e-08  
a 2.444192365087397 1.2936e-08 au
q 2.277294348197989 1.192e-07 au
i 19.95252721250368 5.5161e-06 deg
node 68.37084637021877 1.1563e-05 deg
peri 107.8863351891232 3.7781e-05 deg
M 204.959095314421 3.708e-05 deg
tp 2459201.598016278814
(2020-Dec-18.09801628)
0.00014483 TDB
period 1395.730283561104
3.82
1.1081e-05
3.034e-08
d
yr
n .2579294898449049 2.0477e-09 deg/d
Q 2.611090381976806 1.382e-08 au
  Orbit Determination Parameters
   # obs. used (total)      774  
   data-arc span      14304 days (39.16 yr)  
   first obs. used      1980-10-05  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53969  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:12:06  

Additional Information
 Earth MOID = 1.33393 au 
 Jupiter MOID = 2.47653 au 
 T_jup = 3.414 
[ 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 14.9   n/a MPO452723  
diameter diameter 4.206 km 0.396 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.120   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39970 (1998 GM9)          Discovered 1998-Apr-02 by LINEAR at Socorro
Reference: 20020526/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-Jan-28 07:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin