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21523 GONG (1998 MW15)
Classification: Main-belt Asteroid          SPK-ID: 2021523
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2617176571262836 5.1617e-08  
a 3.0095342562524 1.709e-08 au
q 2.22188600166473 1.5158e-07 au
i 26.5282469239843 5.5694e-06 deg
node 117.9056803882054 1.0428e-05 deg
peri 193.1187199844783 1.3179e-05 deg
M 140.9601667096709 9.091e-06 deg
tp 2458649.808397057766
(2019-Jun-15.30839706)
4.6047e-05 TDB
period 1906.985379868752
5.22
1.6243e-05
4.447e-08
d
yr
n .1887796329223966 1.608e-09 deg/d
Q 3.797182510840071 2.1562e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1114  
   data-arc span      15916 days (43.58 yr)  
   first obs. used      1977-07-20  
   last obs. used      2021-02-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:00:33  

Additional Information
 Earth MOID = 1.21161 au 
 Jupiter MOID = 1.49649 au 
 T_jup = 3.042 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457540.5 (2016-Jun-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2629718312695516 5.1413e-08  
q 2.215553971076709 1.5102e-07 au
tp 2456746.323290399323
(2014-Mar-29.82329040)
4.4467e-05 TDB
node 117.9856119799635 1.0435e-05 deg
peri 193.1657240395311 1.318e-05 deg
i 26.5320609284101 5.5699e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1114  
   data-arc span      15916 days (43.58 yr)  
   first obs. used      1977-07-20  
   last obs. used      2021-02-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:00:33  

Additional Information
 Jupiter MOID = 1.49649 au 
 T_jup = 3.042 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.643321423012803E-15 -7.740250986329093E-15 3.513551811198007E-13 -1.29022945314993E-15 4.487718297066317E-14 -2.165406873980548E-16
q -7.740250986329093E-15 2.280566899892488E-14 -1.109354242533949E-12 3.600483929131663E-15 -1.320177016104428E-13 1.489953422645751E-15
tp 3.513551811198007E-13 -1.109354242533949E-12 1.977329166324978E-9 -5.357267264139319E-12 3.781877540720962E-10 -4.058018923671374E-14
node -1.29022945314993E-15 3.600483929131663E-15 -5.357267264139319E-12 1.088890993342762E-10 -9.799120453178343E-11 6.485636607206923E-12
peri 4.487718297066317E-14 -1.320177016104428E-13 3.781877540720962E-10 -9.799120453178343E-11 1.737072767462843E-10 -5.971614897611521E-12
i -2.165406873980548E-16 1.489953422645751E-15 -4.058018923671374E-14 6.485636607206923E-12 -5.971614897611521E-12 3.102428161026652E-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 13.97   n/a MPCxxxxx  
diameter diameter 10.366 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21523 GONG           Discovered 1998 June 26 by R. A. Tucker at the Goodricke-Pigott Observatory.
The Global Oscillation Network Group operates solar telescopes in California, Hawaii, Australia, India, the Canary Islands and Chile that provide doppler, magnetic and intensity images every minute. Helioseismic data acquired at the GONG stations have provided much information about the interior structure of the sun.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011230/MPCPages.arcLast Updated: 2009-05-11

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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