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172258 (2002 SG23)
Classification: Main-belt Asteroid          SPK-ID: 2172258
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08121153331755138 6.7328e-08  
a 2.772878076411394 1.8446e-08 au
q 2.547688396123403 1.9763e-07 au
i 1.753806879805374 4.1107e-06 deg
node 95.79881442756374 0.0001578 deg
peri 249.3697184242628 0.00015987 deg
M 41.98108181000293 2.4054e-05 deg
tp 2459199.826560528739
(2020-Dec-16.32656053)
0.00011279 TDB
period 1686.53200815763
4.62
1.6829e-05
4.608e-08
d
yr
n .2134557768596781 2.13e-09 deg/d
Q 2.998067756699386 1.9944e-08 au
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      6598 days (18.06 yr)  
   first obs. used      2002-09-27  
   last obs. used      2020-10-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:52:04  

Additional Information
 Earth MOID = 1.53992 au 
 Jupiter MOID = 2.32037 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457773.5 (2017-Jan-20.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08308073337884535 6.7168e-08  
q 2.543252636636405 1.9784e-07 au
tp 2457517.960161990467
(2016-May-09.46016199)
0.00011241 TDB
node 95.80629933857483 0.00015778 deg
peri 250.5986527154997 0.00015974 deg
i 1.754118096162177 4.1081e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      6598 days (18.06 yr)  
   first obs. used      2002-09-27  
   last obs. used      2020-10-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:52:04  

Additional Information
 Jupiter MOID = 2.32037 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.511497541644585E-15 -1.325833036735179E-14 1.074505282185255E-12 6.461968926762788E-14 3.094624127579673E-13 -5.246530745636313E-16
q -1.325833036735179E-14 3.91405076600765E-14 -3.366995611411708E-12 -1.906110389927585E-13 -9.494794227976108E-13 1.613601969636572E-15
tp 1.074505282185255E-12 -3.366995611411708E-12 1.263665591562203E-8 7.697885122701434E-12 2.839278570907979E-9 8.119029766633346E-13
node 6.461968926762788E-14 -1.906110389927585E-13 7.697885122701434E-12 2.489396768150893E-8 -2.487835684952362E-8 1.494898754300662E-10
peri 3.094624127579673E-13 -9.494794227976108E-13 2.839278570907979E-9 -2.487835684952362E-8 2.551801416153168E-8 -1.492550464883845E-10
i -5.246530745636313E-16 1.613601969636572E-15 8.119029766633346E-13 1.494898754300662E-10 -1.492550464883845E-10 1.687665014752096E-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 16.21   n/a E2021B55  
diameter diameter 3.838 km 0.725 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172258 (2002 SG23)          Discovered 2002-Sep-27 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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