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 ]  
308242 (2005 GO21)
Classification: Aten [NEO, PHA]          SPK-ID: 2308242
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .339946065979183 1.482e-07  
a .7532304308819621 5.0439e-09 au
q .4971727091278342 1.1327e-07 au
i 24.92798911207094 6.8201e-06 deg
node 272.6886081783989 3.665e-06 deg
peri 156.639457625347 2.7863e-05 deg
M 213.4541101440618 7.7079e-05 deg
tp 2459297.698901017934
(2021-Mar-24.19890102)
5.1896e-05 TDB
period 238.7757473161111
0.65
2.3984e-06
6.566e-09
d
yr
n 1.507690810505148 1.5144e-08 deg/d
Q 1.00928815263609 6.7586e-09 au
  Orbit Determination Parameters
   # obs. used (total)      207  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      5562 days (15.23 yr)  
   first obs. used      2005-04-01  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-18 06:26:58  

Additional Information
 Earth MOID = .0454899 au 
 Jupiter MOID = 4.2441 au 
 T_jup = 7.557 
[ 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 16.44   n/a E2021B25  
rotation period rot_per 11.00 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Benner, L.A.M. http://echo.jpl.nasa.gov/asteroids/2005GO21/2005GO21_planning.html]
[Higgins, D.J. (2012) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]

308242 (2005 GO21)          Discovered 2005-Apr-01 by Siding Spring Survey at Siding Spring
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
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 03:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin