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117324 (2004 WW4)
Classification: Main-belt Asteroid          SPK-ID: 2117324
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1673616386897718 6.9295e-08  
a 2.141849663768045 1.3764e-08 au
q 1.783386194212688 1.5495e-07 au
i 4.589729220139866 5.4242e-06 deg
node 287.2754740061667 6.0018e-05 deg
peri 30.78358953067944 6.1251e-05 deg
M 74.74651635825681 1.099e-05 deg
tp 2458762.777461316502
(2019-Oct-06.27746132)
3.4656e-05 TDB
period 1144.937825809535
3.13
1.1037e-05
3.022e-08
d
yr
n .3144275539551327 3.031e-09 deg/d
Q 2.500313133323402 1.6068e-08 au
  Orbit Determination Parameters
   # obs. used (total)      717  
   data-arc span      10042 days (27.49 yr)  
   first obs. used      1991-08-08  
   last obs. used      2019-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53859  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 19:27:37  

Additional Information
 Earth MOID = .771731 au 
 Jupiter MOID = 2.77763 au 
 T_jup = 3.690 
[ 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 16.1   n/a MPO436563  
diameter diameter 1.480 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 30.256 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.386   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117324 (2004 WW4)          Discovered 2004-Nov-18 by CINEOS at Campo Imperatore
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2004 WW4 = 1991 PY20 = 2001 YD2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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