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181918 (1999 TL74)
Classification: Main-belt Asteroid          SPK-ID: 2181918
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09149584500207063 3.7372e-08  
a 2.298507672922958 1.1782e-08 au
q 2.088203771145129 8.6988e-08 au
i 3.415827632905098 5.7294e-06 deg
node 191.981420019926 6.7192e-05 deg
peri 287.993496428312 7.5593e-05 deg
M 281.7899620863361 3.6175e-05 deg
tp 2459477.020516436974
(2021-Sep-19.52051644)
0.00012869 TDB
period 1272.821092699139
3.48
9.787e-06
2.68e-08
d
yr
n .2828362933840022 2.1748e-09 deg/d
Q 2.508811574700787 1.286e-08 au
  Orbit Determination Parameters
   # obs. used (total)      311  
   data-arc span      7734 days (21.17 yr)  
   first obs. used      1999-10-10  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:36  

Additional Information
 Earth MOID = 1.10698 au 
 Jupiter MOID = 2.54393 au 
 T_jup = 3.585 
[ 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 17.42   n/a MPCxxxxx  

181918 (1999 TL74)          Discovered 1999-Oct-10 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TL74 = 2006 RQ69 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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