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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 
[ 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 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1943-Jul-08 19:54 00:02 Jupiter 1.51919662084519 1.51919536612602 1.51919787560366 5.75560426000467 5.6579048881888 2430914.329352858 1.53986627543727 400.292806848757 10.3649979435016 -81.1707749312013 3860768.05800118 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:00:40 2021-Aug-25 15:00
1990-May-23 19:11 < 00:01 Jupiter 1.56139226443268 1.56139165961716 1.56139286924847 5.7653691515624 5.67049587406091 2448035.299012531 0.55698048749792 118.733507939994 28.941288334857 86.0872645103496 3885091.62003541 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:00:40 2021-Aug-25 15:00
2074-Feb-16 13:31 00:01 Jupiter 1.5772225747908 1.57722167481495 1.57722347479078 5.76912869226385 5.67527773837778 2478620.063166078 1.08367373815867 328.294161463888 12.2676106280891 -82.4574833462351 3742592.07166117 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:00:40 2021-Aug-25 15:00
2121-Jan-01 00:15 00:02 Jupiter 1.51538907596005 1.51538765892246 1.5153904930129 5.73978804717306 5.64156648339784 2495739.510347888 2.06754617486347 285.216425502882 34.3524879891366 77.4683944266617 3895144.5797465 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:00:40 2021-Aug-25 15:00
2167-Oct-06 15:57 00:04 Jupiter 1.92737310727171 1.92736714958774 1.92737906496379 5.69714358477401 5.61947552529981 2512819.164801107 4.16796877265484 360.819193224558 76.3796457655282 35.1772748149479 2993968.89065422 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:00:40 2021-Aug-25 15:00
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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