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20889 (2000 WB15)
Classification: Main-belt Asteroid          SPK-ID: 2020889
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2366517545885954 3.2999e-08  
a 2.234667714531106 6.6379e-09 au
q 1.705829678964834 7.3173e-08 au
i 4.047829838691571 3.5536e-06 deg
node 296.9335349390399 5.3011e-05 deg
peri 31.57430744685864 5.3645e-05 deg
M 75.23509172813003 1.0378e-05 deg
tp 2458945.502564521946
(2020-Apr-06.00256452)
3.45e-05 TDB
period 1220.163020520066
3.34
5.4366e-06
1.488e-08
d
yr
n .2950425426321792 1.3146e-09 deg/d
Q 2.763505750097379 8.2087e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1282  
   data-arc span      10010 days (27.41 yr)  
   first obs. used      1993-09-15  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50258  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:34:05  

Additional Information
 Earth MOID = .694075 au 
 Jupiter MOID = 2.59185 au 
 T_jup = 3.599 
[ 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 15.46   n/a E2021B10  
diameter diameter 2.509 km 0.591 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
rotation period rot_per 5.864 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.150   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

20889 (2000 WB15)          Discovered 2000-Nov-20 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2000 WB15 = 1993 RU20 = 1997 YY18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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