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21956 Thangada (1999 VE179)
Classification: Main-belt Asteroid          SPK-ID: 2021956
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09813594711068654 4.9053e-08  
a 2.777839184281051 1.3912e-08 au
q 2.505233305010453 1.3031e-07 au
i 9.907635493703014 4.2355e-06 deg
node 148.4054321686475 2.4859e-05 deg
peri 23.35673926289122 3.1531e-05 deg
M 132.8192390058193 1.9982e-05 deg
tp 2458772.596296831730
(2019-Oct-16.09629683)
9.2517e-05 TDB
period 1691.060232100383
4.63
1.2704e-05
3.478e-08
d
yr
n .2128841972428514 1.5993e-09 deg/d
Q 3.050445063551649 1.5278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1500  
   data-arc span      24224 days (66.32 yr)  
   first obs. used      1955-04-14  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:45  

Additional Information
 Earth MOID = 1.51593 au 
 Jupiter MOID = 1.92618 au 
 T_jup = 3.306 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457272.5 (2015-Sep-07.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .099143203314609 4.875e-08  
q 2.498633889703015 1.2979e-07 au
tp 2457079.267909998146
(2015-Feb-25.76791000)
8.9753e-05 TDB
node 148.4501827477085 2.4894e-05 deg
peri 21.98709662975996 3.1533e-05 deg
i 9.903810462297356 4.2332e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1500  
   data-arc span      24224 days (66.32 yr)  
   first obs. used      1955-04-14  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:45  

Additional Information
 Jupiter MOID = 1.92618 au 
 T_jup = 3.306 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.376554928423543E-15 -6.304717664014659E-15 1.417453493932827E-12 2.962915564889549E-16 2.820179756650534E-13 -3.697968632427244E-15
q -6.304717664014659E-15 1.684418642684889E-14 -3.764020298979359E-12 7.933942352775881E-17 -7.456440263769846E-13 9.913658952314816E-15
tp 1.417453493932827E-12 -3.764020298979359E-12 8.055573730145611E-9 -4.276922318406226E-13 1.760783356436564E-9 -5.168702309737602E-12
node 2.962915564889549E-16 7.933942352775881E-17 -4.276922318406226E-13 6.197310313595521E-10 -6.101828978736165E-10 3.673190104341564E-11
peri 2.820179756650534E-13 -7.456440263769846E-13 1.760783356436564E-9 -6.101828978736165E-10 9.943118721899726E-10 -3.729183029584991E-11
i -3.697968632427244E-15 9.913658952314816E-15 -5.168702309737602E-12 3.673190104341564E-11 -3.729183029584991E-11 1.792013825551782E-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 14.17   n/a MPO636393  
diameter diameter 4.233 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.188   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21956 Thangada           Discovered 1999 Nov. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Neela Devi Thangada (b. 1990) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her botany & zoology project. She attends the Keystone Junior High School, San Antonio, Texas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 VE179 = 1987 DC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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