Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
39538 (1991 FD2)
Classification: Main-belt Asteroid          SPK-ID: 2039538
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .152188557515401 8.6016e-08  
a 2.345826762339891 1.3851e-08 au
q 1.988818771198359 2.0967e-07 au
i 2.547236186168669 6.0962e-06 deg
node 13.13494103521652 0.00011266 deg
peri 169.5064476818948 0.00011368 deg
M 13.91518565966085 1.6929e-05 deg
tp 2457549.774208041183
(2016-Jun-10.27420804)
6.1535e-05 JED
period 1312.327808755886
3.59
1.1623e-05
3.182e-08
d
yr
n .2743217034631671 2.4296e-09 deg/d
Q 2.702834753481422 1.5959e-08 au
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      20296 days (55.57 yr)  
   first obs. used      1960-09-24  
   last obs. used      2016-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54331  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:14:43  

Additional Information
 Earth MOID = .990622 au 
 Jupiter MOID = 2.25789 au 
 T_jup = 3.544 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO365716  

39538 (1991 FD2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 FD2 = 1980 BS5 = 2000 VH23 = 2000 WA189 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-04 04:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin