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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309443966216259 1.8996e-08  
a 3.181071030238264 1.7379e-08 au
q 2.764527603573181 5.9488e-08 au
i 24.15553404302641 7.356e-07 deg
node 164.6246449883045 2.9044e-06 deg
peri 27.0497006083718 1.3135e-05 deg
M 53.34567090711559 9.9479e-06 deg
tp 2458893.417436477631
(2020-Feb-13.91743648)
5.7023e-05 TDB
period 2072.327913178557
5.67
1.6982e-05
4.649e-08
d
yr
n .1737176813141644 1.4236e-09 deg/d
Q 3.597614456903348 1.9654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2289  
   data-arc span      14951 days (40.93 yr)  
   first obs. used      1980-03-16  
   last obs. used      2021-02-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45528  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:54:08  

Additional Information
 Earth MOID = 1.78379 au 
 Jupiter MOID = 1.40753 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 12.51   n/a E2021B10  
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. 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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