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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2812789546759652 3.656e-08  
a 2.400869300060585 1.074e-08 au
q 1.725555293025927 8.9658e-08 au
i 21.07474537365622 4.2374e-06 deg
node 233.9980120639134 1.1664e-05 deg
peri 293.5209134951429 1.4295e-05 deg
M 189.2036306831601 1.1699e-05 deg
tp 2459645.154974223229
(2022-Mar-06.65497422)
4.6537e-05 TDB
period 1358.786440535189
3.72
9.1172e-06
2.496e-08
d
yr
n .2649422964937786 1.7777e-09 deg/d
Q 3.076183307095242 1.376e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1897  
   data-arc span      12060 days (33.02 yr)  
   first obs. used      1987-10-23  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4087  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:44  

Additional Information
 Earth MOID = .825258 au 
 Jupiter MOID = 2.22469 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 13.1   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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