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91788 (1999 TG221)
Classification: Main-belt Asteroid          SPK-ID: 2091788
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06996287336989924 4.6978e-08  
a 3.0544059018343 2.8449e-08 au
q 2.840710888503994 1.473e-07 au
i 12.13362014399353 7.6394e-06 deg
node 3.204737199948136 2.5911e-05 deg
peri 73.1169735940112 6.4313e-05 deg
M 265.4911399263621 5.6674e-05 deg
tp 2459512.368702861532
(2021-Oct-24.86870286)
0.00030655 TDB
period 1949.793203373449
5.34
2.7241e-05
7.458e-08
d
yr
n .1846349650707282 2.5795e-09 deg/d
Q 3.268100915164605 3.0439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      648  
   data-arc span      7606 days (20.82 yr)  
   first obs. used      1999-10-02  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:19:57  

Additional Information
 Earth MOID = 1.88389 au 
 Jupiter MOID = 1.9423 au 
 T_jup = 3.198 
[ show covariance matrix ]

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 14.7   n/a MPO432455  

91788 (1999 TG221)          Discovered 1999-Oct-02 by CSS at Catalina
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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