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218601 (2005 NR55)
Classification: Main-belt Asteroid          SPK-ID: 2218601
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .20909077546944 3.6955e-08  
a 2.625397449596631 1.9465e-08 au
q 2.076451060944981 9.9301e-08 au
i 16.69326071528506 7.6947e-06 deg
node 198.3993076916895 1.3609e-05 deg
peri 75.30084229327613 2.3821e-05 deg
M 203.4253896080543 2.1223e-05 deg
tp 2459676.287033098062
9.5645e-05 TDB
period 1553.785325132235
n .2316922384174031 2.5767e-09 deg/d
Q 3.17434383824828 2.3535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      363  
   data-arc span      14835 days (40.62 yr)  
   first obs. used      1979-06-16  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:59:17  

Additional Information
 Earth MOID = 1.1329 au 
 Jupiter MOID = 2.09804 au 
 T_jup = 3.313 
[ 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 16.2   n/a MPO459970  

218601 (2005 NR55)          Discovered 2005-Jul-11 by Lowe, A. at Mayhill
Reference: 20090904/Numbers.arcLast Updated: 2009-09-08

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
1938-Jul-25 03:50 < 00:01 Europ 0.00960802291940996 0.00959710265506201 0.00961896523840396 6.70206179608432 6.7020616310291 2429104.659551688 0.710584036286691 915.214085210726 87.5276836449675 53.8118983746042 13281.116105152 T 12 CATAB v2.0f-lin.ifort 2020-Feb-25 03:59:33 2020-Feb-25 03:59

Alternate Designations
 2005 NR55 = 2001 QS258 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Nov-25 00:53 UT
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