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
JPL Small-Body Database Browser
Search: [ help ]  
20921 (6680 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2020921
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06208826270257209 3.2271e-08  
a 2.340552188876745 7.8945e-09 au
q 2.195231369704685 7.5004e-08 au
i 6.270883787403672 3.5598e-06 deg
node 183.6792799146953 3.1322e-05 deg
peri 256.0681978470493 4.2521e-05 deg
M 226.6786127140339 2.9448e-05 deg
tp 2459684.865547067995
(2022-Apr-15.36554707)		 0.00010784 TDB
period 1307.90415922137
3.58		 6.6172e-06
1.812e-08		 d
yr
n .2752495260924298 1.3926e-09 deg/d
Q 2.485873008048804 8.3847e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1524  
   data-arc span      21900 days (59.96 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49965  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:34:47  

Additional Information
 Earth MOID = 1.21986 au 
 Jupiter MOID = 2.64172 au 
 T_jup = 3.554 
[ 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 15.22   n/a E2021B10  

20921 (6680 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 6680 P-L = 1998 FY56 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 15:02 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin