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20891 (2000 WN28)
Classification: Main-belt Asteroid          SPK-ID: 2020891
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1835479950859495 1.5622e-08  
a 2.672140583722575 1.0659e-08 au
q 2.181674536992498 4.2762e-08 au
i 15.47926681521687 4.7737e-07 deg
node 148.3658902943692 1.2387e-06 deg
peri 265.2861692351949 5.4107e-06 deg
M 213.8042176562855 8.1338e-06 deg
tp 2459848.417521030134
(2022-Sep-25.91752103)
3.8385e-05 TDB
period 1595.465367273481
4.37
9.5463e-06
2.614e-08
d
yr
n .2256394951494374 1.3501e-09 deg/d
Q 3.162606630452653 1.2615e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2348  
   data-arc span      14064 days (38.51 yr)  
   first obs. used      1982-08-19  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:34:06  

Additional Information
 Earth MOID = 1.25461 au 
 Jupiter MOID = 2.37429 au 
 T_jup = 3.305 
[ 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 13.42   n/a E2021B10  
diameter diameter 12.816 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.417 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 0.089   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20891 (2000 WN28)          Discovered 2000-Nov-23 by JPL/GEODSS NEAT at Haleakala
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2000 WN28 = 1982 QC1 = 1991 RU24 = 1993 DT3 = 1998 HL112 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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