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21750 Tartakahashi (1999 RG173)
Classification: Main-belt Asteroid          SPK-ID: 2021750
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .11519487525042 2.6769e-08  
a 2.235938095951569 5.8995e-09 au
q 1.978369485920767 5.968e-08 au
i 6.281000340082585 3.4329e-06 deg
node 54.56578282703261 3.4201e-05 deg
peri 30.26218632991949 3.9648e-05 deg
M 103.5125689975725 2.0013e-05 deg
tp 2459045.361316500203
(2020-Jul-14.86131650)
6.7379e-05 TDB
period 1221.203640138536
3.34
4.8332e-06
1.323e-08
d
yr
n .2947911291512044 1.1667e-09 deg/d
Q 2.493506705982372 6.5791e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1267  
   data-arc span      8979 days (24.58 yr)  
   first obs. used      1996-11-06  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:36:31  

Additional Information
 Earth MOID = .996922 au 
 Jupiter MOID = 2.69683 au 
 T_jup = 3.622 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.67   n/a MPO636390  

21750 Tartakahashi           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Taryn Mahealani Takahashi (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her microbiology team project. She attends the Henry Perrine Baldwin High School, Wailuku, Hawaii, 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: 20050822/MPCPages.arcLast Updated: 2005-08-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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