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 ]  
216639 (2003 GK21)
Classification: Mars-crossing Asteroid          SPK-ID: 2216639
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2705679820899304 3.6644e-08  
a 1.995931043985103 1.0567e-08 au
q 1.455896009023406 7.4531e-08 au
i 6.74214500279076 4.1465e-06 deg
node 66.15063045737992 4.0208e-05 deg
peri 345.4067568921491 4.2834e-05 deg
M 225.2569794350654 2.0678e-05 deg
tp 2459585.996557841369
(2022-Jan-06.49655784)
6.1831e-05 TDB
period 1029.951386283592
2.82
8.1796e-06
2.239e-08
d
yr
n .3495310601978994 2.7759e-09 deg/d
Q 2.535966078946801 1.3427e-08 au
  Orbit Determination Parameters
   # obs. used (total)      393  
   data-arc span      6940 days (19.00 yr)  
   first obs. used      2001-05-23  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56615  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:55:40  

Additional Information
 Earth MOID = .467556 au 
 Jupiter MOID = 2.84238 au 
 T_jup = 3.791 
[ 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 17.08   n/a E2021B55  

216639 (2003 GK21)          Discovered 2003-Apr-07 by Spacewatch at Kitt Peak
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Alternate Designations
 2003 GK21 = 2004 PW97 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-17 09:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin