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27118 (1998 WD8)
Classification: Main-belt Asteroid          SPK-ID: 2027118
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02421746483517463 4.0366e-08  
a 2.741348087902961 1.5235e-08 au
q 2.674959586983197 1.072e-07 au
i 6.218078677855183 4.5702e-06 deg
node 69.86505622624109 4.5063e-05 deg
peri 33.91850509109964 0.00012123 deg
M 253.3638467236275 0.00011355 deg
tp 2459491.573696970436
(2021-Oct-04.07369697)
0.00052331 TDB
period 1657.847976297245
4.54
1.382e-05
3.784e-08
d
yr
n .217148981780615 1.8102e-09 deg/d
Q 2.807736588822724 1.5604e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      9309 days (25.49 yr)  
   first obs. used      1993-11-11  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56359  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:26:56  

Additional Information
 Earth MOID = 1.69412 au 
 Jupiter MOID = 2.22393 au 
 T_jup = 3.341 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456381.5 (2013-Mar-30.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .023616948590696 3.9893e-08  
q 2.676774427304175 1.0591e-07 au
tp 2456142.889630931263
(2012-Aug-03.38963093)
0.00054049 TDB
node 69.90197169085353 4.5048e-05 deg
peri 27.21532664458869 0.00012512 deg
i 6.220018851682756 4.5723e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      9309 days (25.49 yr)  
   first obs. used      1993-11-11  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56359  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:26:56  

Additional Information
 Jupiter MOID = 2.22393 au 
 T_jup = 3.341 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.591415476474098E-15 -4.186526269947865E-15 4.650973234901501E-13 -3.403617331853769E-15 7.288671049394722E-14 6.792917879840048E-16
q -4.186526269947865E-15 1.121610161514355E-14 -4.736884472369708E-13 8.629739397212568E-15 -2.574398400940057E-14 -1.759026253673552E-15
tp 4.650973234901501E-13 -4.736884472369708E-13 2.921342848763278E-7 -7.93230699839963E-11 6.311885957043364E-8 3.648868507240286E-13
node -3.403617331853769E-15 8.629739397212568E-15 -7.93230699839963E-11 2.029357622221073E-9 -2.034200381387279E-9 -3.993816674024056E-11
peri 7.288671049394722E-14 -2.574398400940057E-14 6.311885957043364E-8 -2.034200381387279E-9 1.565422721166931E-8 3.975956605531524E-11
i 6.792917879840048E-16 -1.759026253673552E-15 3.648868507240286E-13 -3.993816674024056E-11 3.975956605531524E-11 2.090614147474637E-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 13.9   n/a MPO347725  
diameter diameter 7.753 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.097   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27118 (1998 WD8)          Discovered 1998-Nov-25 by Kobayashi, T. at Oizumi
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WD8 = 1993 VY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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