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11608 (1995 WU4)
Classification: Main-belt Asteroid          SPK-ID: 2011608
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1945031668825584 5.4266e-08  
a 2.696107749989486 1.2988e-08 au
q 2.171706254359921 1.4502e-07 au
i 10.82895935291682 4.5318e-06 deg
node 297.4273196761511 2.9442e-05 deg
peri 93.84538846816125 3.1956e-05 deg
M 219.0900797504649 1.1295e-05 deg
tp 2459633.412047268544
(2022-Feb-22.91204727)
5.1935e-05 TDB
period 1616.978681225445
4.43
1.1684e-05
3.199e-08
d
yr
n .222637443634798 1.6087e-09 deg/d
Q 3.220509245619049 1.5514e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      10891 days (29.82 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-07-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:58:27  

Additional Information
 Earth MOID = 1.20963 au 
 Jupiter MOID = 2.35085 au 
 T_jup = 3.317 
[ 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 14.1   n/a MPO279638  
diameter diameter 3.973 km 0.767 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.83468 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.308   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11608 (1995 WU4)          Discovered 1995-Nov-18 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 WU4 = 1990 RK9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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