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11658 (1997 EQ17)
Classification: Main-belt Asteroid          SPK-ID: 2011658
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309592520738597 4.9392e-08  
a 3.180699160084898 1.8643e-08 au
q 2.764157177008226 1.549e-07 au
i 24.15567120146239 5.0963e-06 deg
node 164.6285678606969 9.9376e-06 deg
peri 26.96068310402524 1.7932e-05 deg
M 18.66842377529195 1.3438e-05 deg
tp 2458893.054688758877
(2020-Feb-13.55468876)
7.7448e-05 TDB
period 2071.964538216591
5.67
1.8216e-05
4.987e-08
d
yr
n .1737481474030747 1.5275e-09 deg/d
Q 3.597241143161571 2.1084e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2192  
   data-arc span      14750 days (40.38 yr)  
   first obs. used      1980-03-16  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45891  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:26:42  

Additional Information
 Earth MOID = 1.78377 au 
 Jupiter MOID = 1.40857 au 
 T_jup = 3.050 
[ 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 12.5   n/a MPO502258  
diameter diameter 12.252 km 2.784 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 9.519 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 0.065   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

11658 (1997 EQ17)          Discovered 1997-Mar-01 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 EQ17 = 1980 FP9 = 1992 LB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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