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181925 (1999 TW117)
Classification: Main-belt Asteroid          SPK-ID: 2181925
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03785423968339904 5.7985e-08  
a 3.082285395193413 2.9756e-08 au
q 2.965607825071122 1.9717e-07 au
i 7.404513503900618 3.7269e-06 deg
node 235.3816856748375 3.8913e-05 deg
peri 88.50311830413044 8.2772e-05 deg
M 16.61280925192126 6.8716e-05 deg
tp 2459109.288777343022
(2020-Sep-16.78877734)
0.00037788 TDB
period 1976.549520227268
5.41
2.8622e-05
7.836e-08
d
yr
n .1821355834072937 2.6375e-09 deg/d
Q 3.198962965315705 3.0883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      553  
   data-arc span      7736 days (21.18 yr)  
   first obs. used      1999-10-04  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:37  

Additional Information
 Earth MOID = 1.96365 au 
 Jupiter MOID = 1.93318 au 
 T_jup = 3.214 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457943.5 (2017-Jul-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04023881002527307 5.8928e-08  
q 2.956937106053962 2.0101e-07 au
tp 2457153.773183686856
(2015-May-11.27318369)
0.00035723 TDB
node 235.5135366377366 3.8781e-05 deg
peri 92.33315553837002 7.715e-05 deg
i 7.418328827031399 3.7344e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      553  
   data-arc span      7736 days (21.18 yr)  
   first obs. used      1999-10-04  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:37  

Additional Information
 Jupiter MOID = 1.93318 au 
 T_jup = 3.214 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.472453062311385E-15 -1.177063598597583E-14 9.321630013596485E-12 4.716797236209409E-15 1.702925207852688E-12 -8.260605245978543E-15
q -1.177063598597583E-14 4.040644146779432E-14 -3.396260877945714E-11 -1.408579069702109E-14 -6.184546052516326E-12 2.861190399945879E-14
tp 9.321630013596485E-12 -3.396260877945714E-11 1.27615000888625E-7 8.39954375208211E-12 2.386186217359043E-8 -2.015638722843133E-11
node 4.716797236209409E-15 -1.408579069702109E-14 8.39954375208211E-12 1.503950543672291E-9 -1.489394171460711E-9 -1.729818443631986E-11
peri 1.702925207852688E-12 -6.184546052516326E-12 2.386186217359043E-8 -1.489394171460711E-9 5.952094306297651E-9 1.351368053174755E-11
i -8.260605245978543E-15 2.861190399945879E-14 -2.015638722843133E-11 -1.729818443631986E-11 1.351368053174755E-11 1.394561032781171E-11

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 15.30   n/a MPCxxxxx  
diameter diameter 4.228 km 0.941 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.119   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181925 (1999 TW117)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TW117 = 2004 RB92 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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