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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0322626219225547 5.5995e-08  
a 2.719043124778629 2.4985e-08 AU
q 2.631319664452774 1.5228e-07 AU
i .7205848775016988 7.3192e-06 deg
node 321.2489996404083 0.00051765 deg
peri 110.2999518977106 0.00053675 deg
M 68.26814280685188 0.00014649 deg
tp 2456489.945263121011
(2013-Jul-16.44526312)
0.0006672 JED
period 1637.655583992465
4.48
2.2573e-05
6.18e-08
d
yr
n .21982644184704 3.03e-09 deg/d
Q 2.806766585104484 2.5791e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      774  
   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      .52048  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:02:04  

Additional Information
 Earth MOID = 1.64467 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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