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 ]  
31564 (1999 FF9)
Classification: Main-belt Asteroid          SPK-ID: 2031564
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1243021779714367 4.4002e-08  
a 2.304127309118806 8.7606e-09 au
q 2.017719266271873 1.0172e-07 au
i 5.939357339190916 3.7927e-06 deg
node 80.43118703781114 5.2616e-05 deg
peri 57.60584787610141 5.6197e-05 deg
M 59.36038562196887 2.0555e-05 deg
tp 2458789.854421953779
(2019-Nov-02.35442195)
7.2627e-05 TDB
period 1277.491837394239
3.50
7.2858e-06
1.995e-08
d
yr
n .2818021919688419 1.6072e-09 deg/d
Q 2.59053535196574 9.8495e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1471  
   data-arc span      14784 days (40.48 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49304  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:25:51  

Additional Information
 Earth MOID = 1.03877 au 
 Jupiter MOID = 2.44374 au 
 T_jup = 3.572 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456693.5 (2014-Feb-05.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1242732831684504 4.4165e-08  
q 2.018283734293929 1.0215e-07 au
tp 2456234.915428272489
(2012-Nov-03.41542827)
7.0269e-05 TDB
node 80.47102982873102 5.2622e-05 deg
peri 57.77043504722634 5.6176e-05 deg
i 5.938813885222881 3.7919e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1471  
   data-arc span      14784 days (40.48 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49304  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:25:51  

Additional Information
 Jupiter MOID = 2.44374 au 
 T_jup = 3.572 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.950519699212931E-15 -4.498490318731695E-15 1.204385708115734E-12 -1.007070272351254E-14 3.984633906337961E-13 1.707897918238295E-15
q -4.498490318731695E-15 1.043386005103094E-14 -2.750101867553148E-12 2.377925608983877E-14 -9.081088375064816E-13 -3.93393484227358E-15
tp 1.204385708115734E-12 -2.750101867553148E-12 4.937710005400273E-9 -4.950517051621163E-12 1.414156796296691E-9 2.257255835757748E-12
node -1.007070272351254E-14 2.377925608983877E-14 -4.950517051621163E-12 2.76903709446117E-9 -2.755455924643678E-9 -2.990465359587209E-11
peri 3.984633906337961E-13 -9.081088375064816E-13 1.414156796296691E-9 -2.755455924643678E-9 3.155764127527765E-9 3.043386413005992E-11
i 1.707897918238295E-15 -3.93393484227358E-15 2.257255835757748E-12 -2.990465359587209E-11 3.043386413005992E-11 1.43781827713753E-11

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 13.9   n/a MPO452614  

31564 (1999 FF9)          Discovered 1999-Mar-20 by LONEOS at Anderson Mesa
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 FF9 = 1979 PJ = 1992 FB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-25 22:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin