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12309 Tommygrav (1992 DD3)
Classification: Main-belt Asteroid          SPK-ID: 2012309
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03227377963732748 5.2627e-08  
a 2.717743795085476 2.2892e-08 AU
q 2.630031930732173 1.4091e-07 AU
i .7204764965197005 6.7678e-06 deg
node 321.2454991274138 0.00048294 deg
peri 109.4399851910819 0.00049958 deg
M 113.1134185157791 0.00013086 deg
tp 2456486.310950664514
(2013-Jul-12.81095066)
0.00059594 JED
period 1636.481862096252
4.48
2.0677e-05
5.661e-08
d
yr
n .2199841063553604 2.7795e-09 deg/d
Q 2.805455659438778 2.3631e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      8069 days (22.09 yr)  
   first obs. used      1992-02-25  
   last obs. used      2014-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51158  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:49:30  

Additional Information
 Earth MOID = 1.64383 AU 
 T_jup = 3.359 
[ 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 14.4 mag n/a MPO279645  

12309 Tommygrav           Discovered 1992 Feb. 25 by Spacewatch at Kitt Peak.
Tommy Grav (b. 1973) earned a Ph.D. in astronomy at the University of Oslo in 2004, in collaboration with the Harvard-Smithsonian Center for Astrophysics, and started work as Junior Scientific Researcher with Pan-STARRS. He is an experienced observer of transneptunian objects and outer satellites of the giant planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1992 DD3 = 1998 MJ 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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