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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1760833427111658 7.4421e-08  
a 2.466353807944005 1.7981e-08 au
q 2.032069985132812 1.7992e-07 au
i 3.067812720326169 8.101e-06 deg
node 158.26823935746 9.2423e-05 deg
peri 19.1654310926296 9.447e-05 deg
M 156.2111012034525 1.8295e-05 deg
tp 2456786.609536369681
(2014-May-09.10953637)
7.2894e-05 JED
period 1414.755834920332
3.87
1.5471e-05
4.236e-08
d
yr
n .2544608695819746 2.7827e-09 deg/d
Q 2.900637630755198 2.1147e-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 = 1.03648 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. 2015-December); 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. (2015) 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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