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12117 Meagmessina (1999 JT60)
Classification: Main-belt Asteroid          SPK-ID: 2012117
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1760933004649425 7.4391e-08  
a 2.466329546539665 1.8022e-08 au
q 2.03202543665529 1.7983e-07 au
i 3.067849955495582 8.1005e-06 deg
node 158.268562702858 9.2428e-05 deg
peri 19.19870080495976 9.4476e-05 deg
M 207.056514131138 1.8252e-05 deg
tp 2458201.540267523406
(2018-Mar-24.04026752)
7.1536e-05 JED
period 1414.734959643537
3.87
1.5506e-05
4.245e-08
d
yr
n .2544646243072323 2.7891e-09 deg/d
Q 2.900633656424039 2.1195e-08 au
  Orbit Determination Parameters
   # obs. used (total)      872  
   data-arc span      10476 days (28.68 yr)  
   first obs. used      1987-03-03  
   last obs. used      2015-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52636  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 16:10:39  

Additional Information
 Earth MOID = 1.03568 au 
 Jupiter MOID = 2.06318 au 
 T_jup = 3.463 
[ 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 14.6 mag n/a MPO350898  
rotation period rot_per 27.9436 h n/a LCDB (Rev. 2016-February); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

12117 Meagmessina           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Meagan Elizabeth Messina (b. 1985) is a finalist in the 2002 Intel International Science and Engineering Fair for her earth and space sciences project. She attends the Saint Joseph's Academy, Baton Rouge, Louisiana, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 JT60 = 1987 ER = 1991 HV1 = 1997 XQ12 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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