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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0242175013111436 3.9044e-08  
a 2.741348101476156 1.423e-08 au
q 2.674959500234356 1.0435e-07 au
i 6.218080276602014 4.455e-06 deg
node 69.86502467135998 4.3034e-05 deg
peri 33.91851600935815 0.00011646 deg
M 253.3638643044779 0.0001096 deg
tp 2459491.573619655445
(2021-Oct-04.07361966)
0.0005053 TDB
period 1657.847988609961
4.54
1.2908e-05
3.534e-08
d
yr
n .2171489801678654 1.6907e-09 deg/d
Q 2.807736702717956 1.4574e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1220  
   data-arc span      9762 days (26.73 yr)  
   first obs. used      1993-11-11  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:27:04  

Additional Information
 Earth MOID = 1.69412 au 
 Jupiter MOID = 2.22393 au 
 T_jup = 3.341 
[ show covariance matrix ]

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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