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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2813143924253217 1.8841e-08  
a 2.400951770626695 9.9803e-09 au
q 1.725529482030346 4.6367e-08 au
i 21.07450047587073 9.6311e-07 deg
node 233.9987043622012 1.8418e-06 deg
peri 293.4957216745879 4.3413e-06 deg
M 242.2332711669811 5.1163e-06 deg
tp 2459645.022442910571
(2022-Mar-06.52244291)
2.1553e-05 TDB
period 1358.856453206821
3.72
8.4727e-06
2.32e-08
d
yr
n .2649286458112786 1.6519e-09 deg/d
Q 3.076374059223044 1.2788e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2123  
   data-arc span      12185 days (33.36 yr)  
   first obs. used      1987-10-23  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41225  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 05:42:48  

Additional Information
 Earth MOID = .824776 au 
 Jupiter MOID = 2.2237 au 
 T_jup = 3.384 
[ 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 13.17   n/a MPCxxxxx  
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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