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(2011 MD)
Classification: Amor [NEO]          SPK-ID: 3568303
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03704175301504686 2.0341e-07  
a 1.056306134862795 1.3598e-06 au
q 1.017178703906928 1.5182e-06 au
i 2.44549855184616 4.7939e-06 deg
node 271.5928149829019 1.8269e-05 deg
peri 5.995426274899553 0.00013515 deg
M 259.9740690203675 0.0023343 deg
tp 2459310.677580614718
(2021-Apr-06.17758061)
0.002782 TDB
period 396.5364644231581
1.09
0.00076569
2.096e-06
d
yr
n .9078610223745559 1.753e-06 deg/d
Q 1.095433565818661 1.4101e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.439034215047371E-11 2.478E-11
A2 [EST] -8.855640706196125E-13 3.787E-12
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      528  
   data-arc span      967 days (2.65 yr)  
   first obs. used      2011-06-21  
   last obs. used      2014-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .33318  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 05:09:42  

Additional Information
 Earth MOID = .000647278 au 
 Jupiter MOID = 3.89393 au 
 T_jup = 5.826 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 28.0   n/a MPO254804  
rotation period rot_per 0.1937 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:
[Ryan, W. (2011) http://infohost.nmt.edu/~bryan/research/work/mro_images/]
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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