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21082 Araimasaru (1991 TG2)
Classification: Main-belt Asteroid          SPK-ID: 2021082
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3054523166046794 1.1202e-07  
a 2.576298153573454 1.4788e-08 au
q 1.789361914300085 2.8301e-07 au
i 5.987212815837437 6.6931e-06 deg
node 45.5687132780499 4.9988e-05 deg
peri 2.921949026764381 5.0558e-05 deg
M 227.3901948599216 1.4194e-05 deg
tp 2459156.872615998737
(2020-Nov-03.37261600)
6.2727e-05 TDB
period 1510.402202521681
4.14
1.3004e-05
3.56e-08
d
yr
n .2383471100604625 2.0521e-09 deg/d
Q 3.363234392846824 1.9304e-08 au
  Orbit Determination Parameters
   # obs. used (total)      585  
   data-arc span      9719 days (26.61 yr)  
   first obs. used      1991-10-09  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50955  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 13:54:43  

Additional Information
 Earth MOID = .799062 au 
 Jupiter MOID = 2.03906 au 
 T_jup = 3.352 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9   n/a MPO439241  

21082 Araimasaru           Discovered 1991 Oct. 13 by T. Hioki and S. Hayakawa at Okutama.
Masaru Arai (b. 1952) is a Japanese amateur astronomer. A devoted observer of small bodies, he has made an astrograph for automatic surveys and discovered the comet C/1991 A2 and 42 minor planets with H. Mori at Yorii.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1991 TG2 = 1993 FK12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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