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18468 (1995 UE8)
Classification: Main-belt Asteroid          SPK-ID: 2018468
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06084746627586136 5.6496e-08  
a 2.806986301704368 1.4098e-08 au
q 2.636188297374607 1.5993e-07 au
i 8.311590777120065 5.8351e-06 deg
node 35.55299014933859 3.0845e-05 deg
peri 171.1304774393661 4.6003e-05 deg
M 324.0058356283868 3.5141e-05 deg
tp 2459372.246723899159
(2021-Jun-06.74672390)
0.00016785 TDB
period 1717.745686921918
4.70
1.2941e-05
3.543e-08
d
yr
n .2095770070860112 1.5789e-09 deg/d
Q 2.97778430603413 1.4956e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1588  
   data-arc span      12058 days (33.01 yr)  
   first obs. used      1988-03-18  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:55  

Additional Information
 Earth MOID = 1.63043 au 
 Jupiter MOID = 1.97985 au 
 T_jup = 3.305 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457018.5 (2014-Dec-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06259240495327084 5.5979e-08  
q 2.630033789526961 1.5866e-07 au
tp 2457658.805390593328
(2016-Sep-27.30539059)
0.00016485 TDB
node 35.62455007744307 3.0876e-05 deg
peri 172.1211311866178 4.5775e-05 deg
i 8.309427406383108 5.8325e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1588  
   data-arc span      12058 days (33.01 yr)  
   first obs. used      1988-03-18  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:55  

Additional Information
 Jupiter MOID = 1.97985 au 
 T_jup = 3.305 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.133621723369593E-15 -8.851229174064623E-15 -3.897552602417719E-12 -7.850518733545788E-15 -7.511397734326377E-13 -1.461480992799033E-15
q -8.851229174064623E-15 2.517231615446997E-14 1.107003270500455E-11 2.119255054055714E-14 2.120457614074272E-12 4.777535625319952E-15
tp -3.897552602417719E-12 1.107003270500455E-11 2.717492808218514E-8 -1.276728969743895E-11 5.590899962574276E-9 6.649241164186034E-12
node -7.850518733545788E-15 2.119255054055714E-14 -1.276728969743895E-11 9.533106965375962E-10 -9.455618457135138E-10 -8.193021404229448E-11
peri -7.511397734326377E-13 2.120457614074272E-12 5.590899962574276E-9 -9.455618457135138E-10 2.095323857400965E-9 8.236163160768581E-11
i -1.461480992799033E-15 4.777535625319952E-15 6.649241164186034E-12 -8.193021404229448E-11 8.236163160768581E-11 3.401812381327808E-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 13.94   n/a MPCxxxxx  
diameter diameter 7.056 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.09056 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.141   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18468 (1995 UE8)          Discovered 1995-Oct-27 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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