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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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 
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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

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