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181940 (1999 TJ169)
Classification: Outer Main-belt Asteroid          SPK-ID: 2181940
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1879972109904769 4.6774e-08  
a 3.93640644577151 5.5455e-08 au
q 3.19637301264153 1.8833e-07 au
i 2.361876720977038 4.6045e-06 deg
node 280.8506917689848 0.00013397 deg
peri 93.38087075003389 0.00013474 deg
M 261.2701441292444 1.7108e-05 deg
tp 2459982.837829007344
(2023-Feb-07.33782901)
0.00014843 TDB
period 2852.648937433198
7.81
6.0281e-05
1.65e-07
d
yr
n .1261984940649327 2.6668e-09 deg/d
Q 4.67643987890149 6.588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      509  
   data-arc span      8041 days (22.02 yr)  
   first obs. used      1998-06-19  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:41  

Additional Information
 Earth MOID = 2.19711 au 
 Jupiter MOID = .851027 au 
 T_jup = 3.029 
[ 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 14.52   n/a E2021B55  
diameter diameter 8.131 km 0.822 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.051   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

181940 (1999 TJ169)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TJ169 = 2006 QW62 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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