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 ]  
39939 (1998 FQ99)
Classification: Main-belt Asteroid          SPK-ID: 2039939
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09060843643008541 3.9074e-08  
a 2.453509834895246 1.1861e-08 au
q 2.231201144989551 9.1356e-08 au
i 4.848771875879717 4.6225e-06 deg
node 237.0799937395851 3.9237e-05 deg
peri 113.2220377414644 4.6321e-05 deg
M 6.2104069948539 2.5047e-05 deg
tp 2458576.284262890444
(2019-Apr-02.78426289)
9.761e-05 TDB
period 1403.718849129166
3.84
1.0179e-05
2.787e-08
d
yr
n .2564616128246304 1.8598e-09 deg/d
Q 2.675818524800941 1.2936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      9348 days (25.59 yr)  
   first obs. used      1994-05-04  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51212  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:12:06  

Additional Information
 Earth MOID = 1.22988 au 
 Jupiter MOID = 2.66231 au 
 T_jup = 3.484 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO452722  
diameter diameter 2.426 km 0.656 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.166   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39939 (1998 FQ99)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FQ99 = 2000 YY74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-19 22:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin