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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08071673019054376 3.295e-08  
a 2.935272099943732 1.2891e-08 au
q 2.698346533816743 9.7451e-08 au
i 3.065668518483783 3.7047e-06 deg
node 113.7359385981394 6.5166e-05 deg
peri 184.4649257784129 6.8661e-05 deg
M 253.2787555540091 2.2359e-05 deg
tp 2459745.026922185993
(2022-Jun-14.52692219)
0.00011477 TDB
period 1836.838513311784
5.03
1.21e-05
3.313e-08
d
yr
n .1959889219389934 1.2911e-09 deg/d
Q 3.172197666070721 1.3931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1880  
   data-arc span      15455 days (42.31 yr)  
   first obs. used      1978-11-29  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:35:22  

Additional Information
 Earth MOID = 1.68057 au 
 Jupiter MOID = 1.97977 au 
 T_jup = 3.268 
[ 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 14.26   n/a E2021B10  
rotation period rot_per 20. h n/a LCDB (Rev. 2020-October); 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. (2012). Mon. Not. Royal Ast. Soc. 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

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Alternate Designations
 1998 XM6 = 1978 WS13 = 1996 LE5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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