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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0795033633933465 4.5399e-08  
a 3.177915210606417 2.2976e-08 au
q 2.925260262784331 1.4427e-07 au
i 9.950466555134273 6.1972e-06 deg
node 317.4515200534326 2.6915e-05 deg
peri 84.92492301857997 4.8138e-05 deg
M 240.2508842738354 3.9632e-05 deg
tp 2459688.806228859793
(2022-Apr-19.30622886)
0.00023039 TDB
period 2069.244861533326
5.67
2.2441e-05
6.144e-08
d
yr
n .17397651031654 1.8868e-09 deg/d
Q 3.430570158428502 2.4803e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      13349 days (36.55 yr)  
   first obs. used      1982-10-21  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44067  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:47:44  

Additional Information
 Earth MOID = 1.95543 au 
 Jupiter MOID = 1.91134 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 12.4   n/a MPO474028  
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. 2019-August); 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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