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22310 (1990 WU1)
Classification: Main-belt Asteroid          SPK-ID: 2022310
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340443828260447 4.61e-08  
a 2.793534515966591 1.2022e-08 au
q 2.139723454273937 1.2794e-07 au
i 8.467431421386127 4.8942e-06 deg
node 182.9769068934769 2.5049e-05 deg
peri 194.1279272185692 2.6254e-05 deg
M 180.0581207188021 8.3821e-06 deg
tp 2460052.931010633187
(2023-Apr-18.43101063)
4.2424e-05 TDB
period 1705.41268688424
4.67
1.1009e-05
3.014e-08
d
yr
n .2110926010863176 1.3626e-09 deg/d
Q 3.447345577659245 1.4835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      12965 days (35.50 yr)  
   first obs. used      1985-09-15  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49369  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:04:12  

Additional Information
 Earth MOID = 1.14077 au 
 Jupiter MOID = 2.0169 au 
 T_jup = 3.272 
[ 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 14.69   n/a E2021B10  
diameter diameter 6.801 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.8489 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 0.061   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22310 (1990 WU1)          Discovered 1990-Nov-18 by Elst, E. W. at La Silla
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1990 WU1 = 1985 RG6 = 1992 DQ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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