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13806 Darmstrong (1998 XM6)
Classification: Main-belt Asteroid          SPK-ID: 2013806
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07999757377157855 5.1719e-08  
a 2.937007836572058 2.5372e-08 au
q 2.702054335498181 1.5001e-07 au
i 3.06533727636003 5.7255e-06 deg
node 113.7605736249215 0.00010031 deg
peri 183.3456385978808 0.00010669 deg
M 261.7420293474514 3.8065e-05 deg
tp 2457902.289274644436
0.00019678 JED
period 1838.468041547239
n .1958152069355674 2.5374e-09 deg/d
Q 3.171961337645936 2.7402e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1051  
   data-arc span      13261 days (36.31 yr)  
   first obs. used      1978-11-29  
   last obs. used      2015-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51413  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:47:49  

Additional Information
 Earth MOID = 1.68436 au 
 Jupiter MOID = 1.96961 au 
 T_jup = 3.267 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO324436  
rotation period rot_per 20. h n/a LCDB (Rev. 2015-December); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2011). MNRAS 421, 2094-2108.]

13806 Darmstrong           Discovered 1998 Dec. 8 by Spacewatch at Kitt Peak.
High-school geography teacher Henry Armstrong (b. 1962) is a Canadian amateur astronomer with keen observing skills.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

[ show close-approach data ]
Alternate Designations
 1998 XM6 = 1978 WS13 = 1996 LE5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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