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JPL Small-Body Database Browser
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277475 (2005 WK4)
Classification: Apollo [NEO, PHA]          SPK-ID: 2277475
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373240573698695 5.2433e-08  
a 1.010611327754812 2.9219e-09 au
q .770768947028089 5.1165e-08 au
i 9.843197707741357 4.0469e-06 deg
node 138.1311199073255 4.1626e-06 deg
peri 74.09842001220817 6.7641e-06 deg
M 303.061738326817 1.425e-05 deg
tp 2458659.191657278509
(2019-Jun-24.69165728)
1.4933e-05 TDB
period 371.0860851625636
1.02
1.6094e-06
4.406e-09
d
yr
n .970125300824182 4.2073e-09 deg/d
Q 1.250453708481535 3.6154e-09 au
  Orbit Determination Parameters
   # obs. used (total)      323  
   # delay obs. used      9  
   # Doppler obs. used      3  
   data-arc span      3180 days (8.71 yr)  
   first obs. used      2005-11-27  
   last obs. used      2014-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54912  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jul-03 06:34:04  

Additional Information
 Earth MOID = .00333733 au 
 Jupiter MOID = 3.72787 au 
 T_jup = 5.992 
[ 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 20.1   n/a MPO268317  
rotation period rot_per 2.595 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Benner, L.A.M. et al. (2013) http://www.jpl.nasa.gov/news/news.php?release=2013-254]
[Stephens, R.D. (2014) Minor Planet Bull. 41, 13-15.]

277475 (2005 WK4)          Discovered 2005-Nov-27 by Siding Spring Survey at Siding Spring
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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