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19966 (1987 SL3)
Classification: Main-belt Asteroid          SPK-ID: 2019966
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07809285568721748 4.2765e-08  
a 3.179332580603139 2.3904e-08 au
q 2.931049420204429 1.3596e-07 au
i 9.960834862045091 5.5875e-06 deg
node 317.4196961266344 2.6174e-05 deg
peri 84.82514044376035 4.51e-05 deg
M 275.0157429215883 3.7648e-05 deg
tp 2459689.308049577520
(2022-Apr-19.80804958)
0.00021878 TDB
period 2070.629360041889
5.67
2.3352e-05
6.393e-08
d
yr
n .1738601832597975 1.9607e-09 deg/d
Q 3.427615741001849 2.577e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1814  
   data-arc span      13900 days (38.06 yr)  
   first obs. used      1982-10-21  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43254  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:10:23  

Additional Information
 Earth MOID = 1.96016 au 
 Jupiter MOID = 1.90998 au 
 T_jup = 3.172 
[ 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 12.39   n/a E2021B10  
diameter diameter 8.690 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.079 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 0.281   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19966 (1987 SL3)          Discovered 1987-Sep-25 by Jensen, P. at Brorfelde
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 SL3 = 1982 UZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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