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181916 (1999 TH53)
Classification: Main-belt Asteroid          SPK-ID: 2181916
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1829686171932469 4.0993e-08  
a 3.058769371509773 1.8848e-08 au
q 2.499110569291573 1.2994e-07 au
i 3.157378735068542 5.87e-06 deg
node 333.114017123079 7.9313e-05 deg
peri 330.9096414427818 8.1858e-05 deg
M 43.92388887977929 1.7338e-05 deg
tp 2458962.094204031461
(2020-Apr-22.59420403)
9.4804e-05 TDB
period 1953.9728548076
5.35
1.8061e-05
4.945e-08
d
yr
n .184240021100727 1.7029e-09 deg/d
Q 3.618428173727974 2.2297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      500  
   data-arc span      7757 days (21.24 yr)  
   first obs. used      1999-10-01  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54789  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:35  

Additional Information
 Earth MOID = 1.48255 au 
 Jupiter MOID = 1.63691 au 
 T_jup = 3.206 
[ 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 15.68   n/a E2021B55  

181916 (1999 TH53)          Discovered 1999-Oct-06 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TH53 = 2004 RS18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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