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11661 (1997 FK4)
Classification: Main-belt Asteroid          SPK-ID: 2011661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1432844668537307 3.6659e-08  
a 2.786717993363135 1.3546e-08 au
q 2.3874245914124 1.0297e-07 au
i 8.727255120471302 5.1066e-06 deg
node 3.498159861469415 2.5111e-05 deg
peri 62.57053820259921 3.2632e-05 deg
M 22.61410567432868 1.8045e-05 deg
tp 2458493.763028539931
(2019-Jan-10.26302854)
8.5238e-05 TDB
period 1699.174412598802
4.65
1.2389e-05
3.392e-08
d
yr
n .2118675971876237 1.5448e-09 deg/d
Q 3.18601139531387 1.5487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1662  
   data-arc span      12455 days (34.10 yr)  
   first obs. used      1985-09-20  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49642  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:32:41  

Additional Information
 Earth MOID = 1.41497 au 
 Jupiter MOID = 2.18968 au 
 T_jup = 3.299 
[ 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 13.5   n/a MPO416840  
diameter diameter 5.257 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.192 h n/a LCDB (Rev. 2019-January); 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 0.212   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11661 (1997 FK4)          Discovered 1997-Mar-31 by LINEAR at Socorro
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 FK4 = 1985 SN4 = 1992 DT = 1997 GW20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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