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JPL Small-Body Database Browser
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59498 (1999 JG8)
Classification: Main-belt Asteroid          SPK-ID: 2059498
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09999904870385953 5.4859e-08  
a 2.470243339459278 1.3512e-08 au
q 2.223221355446305 1.3485e-07 au
i 24.38463237570803 5.935e-06 deg
node 201.1631165725659 1.1684e-05 deg
peri 331.5447093127909 2.6385e-05 deg
M 210.6160272816103 2.4984e-05 deg
tp 2459588.949958359333
(2022-Jan-09.44995836)
9.9077e-05 TDB
period 1418.103837743774
3.88
1.1635e-05
3.185e-08
d
yr
n .2538601126506827 2.0829e-09 deg/d
Q 2.717265323472251 1.4863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      7603 days (20.82 yr)  
   first obs. used      1999-03-24  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:26  

Additional Information
 Earth MOID = 1.23854 au 
 Jupiter MOID = 2.27272 au 
 T_jup = 3.355 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457070.5 (2015-Feb-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09924386909052026 5.4999e-08  
q 2.225482771199272 1.3507e-07 au
tp 2456751.921095400206
(2014-Apr-04.42109540)
9.8646e-05 TDB
node 201.2041514182725 1.1677e-05 deg
peri 331.5185707269997 2.6481e-05 deg
i 24.39028056038869 5.9364e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      7603 days (20.82 yr)  
   first obs. used      1999-03-24  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:26  

Additional Information
 Jupiter MOID = 2.27272 au 
 T_jup = 3.355 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.024882288944656E-15 -7.398704793752585E-15 1.753070397266212E-13 -1.322057356517429E-15 2.420222159999832E-14 9.483620952676838E-15
q -7.398704793752585E-15 1.824452665360053E-14 -5.272467463635441E-13 2.493204620407583E-15 -7.992522375716417E-14 -2.25745315608737E-14
tp 1.753070397266212E-13 -5.272467463635441E-13 9.73103540768117E-9 -6.650796755259626E-12 2.365948381696688E-9 -1.892970634620753E-11
node -1.322057356517429E-15 2.493204620407583E-15 -6.650796755259626E-12 1.363631837813112E-10 -1.251292505522396E-10 -1.565169387678662E-11
peri 2.420222159999832E-14 -7.992522375716417E-14 2.365948381696688E-9 -1.251292505522396E-10 7.012640266348615E-10 9.718818505179588E-12
i 9.483620952676838E-15 -2.25745315608737E-14 -1.892970634620753E-11 -1.565169387678662E-11 9.718818505179588E-12 3.524041229938458E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO449383  
diameter diameter 3.637 km 0.257 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59498 (1999 JG8)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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