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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
(2009 KR21)
Classification: Apollo [NEO]          SPK-ID: 3462071
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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 2454983.5 (2009-Jun-01.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5195451471087045 0.0026184  
a 1.730616961874994 0.0080076 au
q .8314833178288312 0.000687 au
i 2.360237481368559 0.0133 deg
node 69.3094783464099 0.0012082 deg
peri 243.2296723270242 0.019188 deg
M 340.6568576471163 0.15843 deg
tp 2455028.181154685777
(2009-Jul-15.68115469)
0.056038 TDB
period 831.5720059042918
2.28
5.7715
0.0158
d
yr
n .4329150060896031 0.0030046 deg/d
Q 2.629750605921158 0.012168 au
  Orbit Determination Parameters
   # obs. used (total)      17  
   first obs. used      2009-05-31  
   last obs. used      2009-05-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .35133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 02:46:07  

Additional Information
 Earth MOID = .00110081 au 
 Jupiter MOID = 2.67867 au 
 T_jup = 3.991 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.7   n/a MPO158656  

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2009-Jun-01 06:09 00:05 Moon 0.00106867334116336 0.0010678646242835 0.00107055530253381 13.8686459666966 13.866434530748 2454983.756342826 4.7372643947945 1705.2143017651 5.48980214401789 87.756945485683 19411.8016674134 T 8 CATAB v2.0g-lin.ifort 2021-Apr-15 02:46:07 2021-Apr-15 02:46
2009-Jun-01 10:07 00:02 Earth 0.00189563745959055 0.00186082911865641 0.00193043046035402 12.978536280977 12.8697798835254 2454983.921645722 1.93541737315283 1714.18700654342 7.40302659772979 1.6630518933585 122.880776415445 T 8 CATAB v2.0g-lin.ifort 2021-Apr-15 02:46:07 2021-Apr-15 02:46
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-20 03:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin