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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .234044382624143 4.6032e-08  
a 2.793534515931336 1.2014e-08 au
q 2.139723454810952 1.2777e-07 au
i 8.467431367911702 4.8909e-06 deg
node 182.9769072945043 2.5012e-05 deg
peri 194.1279268699228 2.6213e-05 deg
M 180.0581207014091 8.3788e-06 deg
tp 2460052.931010699445
(2023-Apr-18.43101070)
4.2414e-05 TDB
period 1705.412686851956
4.67
1.1002e-05
3.012e-08
d
yr
n .2110926010903137 1.3618e-09 deg/d
Q 3.447345577051719 1.4826e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1162  
   data-arc span      12968 days (35.50 yr)  
   first obs. used      1985-09-15  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:19:42  

Additional Information
 Earth MOID = 1.14077 au 
 Jupiter MOID = 2.0169 au 
 T_jup = 3.272 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457185.5 (2015-Jun-12.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2304360953355406 4.5657e-08  
q 2.154732730073252 1.2626e-07 au
tp 2456637.508729711828
(2013-Dec-11.00872971)
3.6965e-05 TDB
node 183.014116476426 2.5061e-05 deg
peri 194.0250364881431 2.6319e-05 deg
i 8.447341561878146 4.8832e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1162  
   data-arc span      12968 days (35.50 yr)  
   first obs. used      1985-09-15  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:19:42  

Additional Information
 Jupiter MOID = 2.0169 au 
 T_jup = 3.272 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.084578807073914E-15 -5.749067980401605E-15 -7.238422087525926E-14 9.044937463981603E-15 -8.875540585105364E-14 -1.276774230786199E-15
q -5.749067980401605E-15 1.594095636987E-14 2.007947493357959E-13 -2.650485666730322E-14 2.512681141979901E-13 3.219356478269564E-15
tp -7.238422087525926E-14 2.007947493357959E-13 1.366385599821843E-9 1.803060348768253E-13 3.023744783244119E-10 -1.773935716689727E-12
node 9.044937463981603E-15 -2.650485666730322E-14 1.803060348768253E-13 6.280625045803416E-10 -6.214131602467317E-10 -3.947202899226877E-12
peri -8.875540585105364E-14 2.512681141979901E-13 3.023744783244119E-10 -6.214131602467317E-10 6.927158966512645E-10 3.54025138748677E-12
i -1.276774230786199E-15 3.219356478269564E-15 -1.773935716689727E-12 -3.947202899226877E-12 3.54025138748677E-12 2.38454199947289E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

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