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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519502309721911 8.8838e-08  
a 2.345391162299034 1.8725e-08 AU
q 1.98900843346756 2.1371e-07 AU
i 2.547278349548569 9.2239e-06 deg
node 13.13527405772362 0.00011881 deg
peri 169.6453153221139 0.0001208 deg
M 209.1543243722935 2.4889e-05 deg
tp 2457550.232884928750
(2016-Jun-10.73288493)
9.5181e-05 JED
period 1311.962293587951
3.59
1.5712e-05
4.302e-08
d
yr
n .2743981300068258 3.2862e-09 deg/d
Q 2.701773891130508 2.1571e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      543  
   data-arc span      19796 days (54.20 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56998  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 03:49:19  

Additional Information
 Earth MOID = .992587 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 15.4 mag n/a MPO219821  

39538 (1991 FD2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla (809)
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 2015-Mar-04 20:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin