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JPL Small-Body Database Browser
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91771 (1999 TW202)
Classification: Main-belt Asteroid          SPK-ID: 2091771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02751765968631848 4.3586e-08  
a 3.016188539206342 3.039e-08 au
q 2.933190089434688 1.2954e-07 au
i 9.154639046345121 4.8424e-06 deg
node 213.1038094927467 3.5545e-05 deg
peri 351.5598031075305 0.0001127 deg
M 149.4584508573553 0.00010712 deg
tp 2458206.164210215760
(2018-Mar-28.66421022)
0.00056972 TDB
period 1913.313584356969
5.24
2.8917e-05
7.917e-08
d
yr
n .1881552521987605 2.8437e-09 deg/d
Q 3.099186988977996 3.1226e-08 au
  Orbit Determination Parameters
   # obs. used (total)      460  
   data-arc span      9075 days (24.85 yr)  
   first obs. used      1994-10-26  
   last obs. used      2019-08-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57385  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:58:29  

Additional Information
 Earth MOID = 1.92819 au 
 Jupiter MOID = 1.8687 au 
 T_jup = 3.228 
[ 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 15.1   n/a MPO439645  

91771 (1999 TW202)          Discovered 1999-Oct-13 by LINEAR at Socorro
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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