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 ]  
39399 (6688 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2039399
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1927477389951747 5.9242e-08  
a 3.13035121662536 2.4223e-08 au
q 2.526983097360027 1.8802e-07 au
i 5.222772418780214 6.5871e-06 deg
node 1.418342479233279 5.7349e-05 deg
peri 342.694592432579 5.9224e-05 deg
M 263.5029387487932 1.6866e-05 deg
tp 2459542.750066410206
(2021-Nov-24.25006641)
9.7808e-05 TDB
period 2022.963408175633
5.54
2.3481e-05
6.429e-08
d
yr
n .1779567532191096 2.0656e-09 deg/d
Q 3.733719335890691 2.8892e-08 au
  Orbit Determination Parameters
   # obs. used (total)      526  
   data-arc span      21766 days (59.59 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55946  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:01  

Additional Information
 Earth MOID = 1.52018 au 
 Jupiter MOID = 1.68438 au 
 T_jup = 3.178 
[ 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 14.8   n/a MPO385067  
diameter diameter 6.754 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.032   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39399 (6688 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 6688 P-L = 1999 RW151 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-02 22:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin