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101507 (1998 XG18)
Classification: Main-belt Asteroid          SPK-ID: 2101507
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06883977882294247 5.3079e-08  
a 2.794433651886594 2.6665e-08 au
q 2.602065457355334 1.4386e-07 au
i 3.488238818510733 5.6355e-06 deg
node 237.5771897681255 7.7511e-05 deg
peri 166.3334503720732 8.6418e-05 deg
M 276.3980435379879 4.3273e-05 deg
tp 2459596.735215575177
(2022-Jan-17.23521557)
0.00020863 TDB
period 1706.236117475074
4.67
2.4422e-05
6.686e-08
d
yr
n .2109907276682995 3.02e-09 deg/d
Q 2.986801846417855 2.8501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      396  
   data-arc span      7484 days (20.49 yr)  
   first obs. used      1998-12-08  
   last obs. used      2019-06-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62849  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:06  

Additional Information
 Earth MOID = 1.61007 au 
 Jupiter MOID = 2.29983 au 
 T_jup = 3.322 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456691.5 (2014-Feb-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07175343289068029 5.322e-08  
q 2.590508829738221 1.4493e-07 au
tp 2456194.351947098423
(2012-Sep-23.85194710)
0.00017583 TDB
node 237.7030683925237 7.7302e-05 deg
peri 167.3446445267734 8.5592e-05 deg
i 3.494671527107565 5.6454e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      396  
   data-arc span      7484 days (20.49 yr)  
   first obs. used      1998-12-08  
   last obs. used      2019-06-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62849  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:06  

Additional Information
 Jupiter MOID = 2.29983 au 
 T_jup = 3.322 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.832395299134179E-15 -7.61653056149331E-15 -2.263097534809685E-14 -5.02389384011997E-15 -9.903562286612592E-15 1.472733666849482E-15
q -7.61653056149331E-15 2.100545781249475E-14 1.928201136448294E-12 8.497881467252717E-15 4.378232341285251E-13 -3.506020523012501E-15
tp -2.263097534809685E-14 1.928201136448294E-12 3.091577250671997E-8 -4.959413708377445E-11 6.482310258160074E-9 1.937067103879855E-12
node -5.02389384011997E-15 8.497881467252717E-15 -4.959413708377445E-11 5.975650344536856E-9 -5.974832708829175E-9 -1.042709784469968E-10
peri -9.903562286612592E-15 4.378232341285251E-13 6.482310258160074E-9 -5.974832708829175E-9 7.325966223656653E-9 1.045116049665682E-10
i 1.472733666849482E-15 -3.506020523012501E-15 1.937067103879855E-12 -1.042709784469968E-10 1.045116049665682E-10 3.187026276006395E-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 15.79   n/a MPCxxxxx  
diameter diameter 4.386 km 0.955 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101507 (1998 XG18)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 XG18 = 2002 RR115 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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