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27708 (1987 WP)
Classification: Main-belt Asteroid          SPK-ID: 2027708
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2808844393602283 3.7521e-08  
a 2.402121771755618 1.1359e-08 au
q 1.727403144621043 9.1579e-08 au
i 21.07575652589024 4.8249e-06 deg
node 234.0149106097117 1.3429e-05 deg
peri 293.6077206368124 1.6489e-05 deg
M 83.1405980994635 1.181e-05 deg
tp 2458286.447973771587
(2018-Jun-16.94797377)
4.3896e-05 TDB
period 1359.849845041689
3.72
9.6452e-06
2.641e-08
d
yr
n .2647351112423471 1.8777e-09 deg/d
Q 3.076840398890194 1.4549e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1532  
   data-arc span      11645 days (31.88 yr)  
   first obs. used      1987-10-23  
   last obs. used      2019-09-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43172  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:44:56  

Additional Information
 Earth MOID = .827109 au 
 Jupiter MOID = 2.22433 au 
 T_jup = 3.383 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO395272  
diameter diameter 6.178 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.320   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

27708 (1987 WP)          Discovered 1987-Nov-20 by Alu, J., Helin, E. F. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 WP = 1985 KF1 = 1998 VX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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