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17690 (1997 CY2)
Classification: Main-belt Asteroid          SPK-ID: 2017690
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1887631689346033 3.0959e-08  
a 3.119922165797872 1.6272e-08 au
q 2.530995770952555 9.4658e-08 au
i 3.767283542451479 3.5345e-06 deg
node 120.3419110937927 8.4761e-05 deg
peri 2.491630955616026 8.6022e-05 deg
M 145.4128937806881 1.5209e-05 deg
tp 2458387.455188495508
(2018-Sep-25.95518850)
8.2631e-05 TDB
period 2012.862302177012
5.51
1.5747e-05
4.311e-08
d
yr
n .1788497899785007 1.3992e-09 deg/d
Q 3.70884856064319 1.9343e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1191  
   data-arc span      14852 days (40.66 yr)  
   first obs. used      1979-12-18  
   last obs. used      2020-08-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:10:15  

Additional Information
 Earth MOID = 1.54664 au 
 Jupiter MOID = 1.37329 au 
 T_jup = 3.185 
[ 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 14.03   n/a E2021B10  
diameter diameter 9.750 km 0.735 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
geometric albedo albedo 0.047   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17690 (1997 CY2)          Discovered 1997-Feb-03 by Kobayashi, T. at Oizumi
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 CY2 = 1979 YA7 = 1995 VU13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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