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8505 (1990 YK)
Classification: Main-belt Asteroid          SPK-ID: 2008505
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .156456797192453 4.4902e-08  
a 2.244999584049809 9.8629e-09 au
q 1.893754139430987 9.93e-08 au
i 2.297213357353264 6.1571e-06 deg
node 172.2151586084976 0.00011401 deg
peri 322.6306989816634 0.00011605 deg
M 139.5056083530549 2.1712e-05 deg
tp 2456924.384861224484
(2014-Sep-23.88486122)
7.3091e-05 JED
period 1228.634833987535
3.36
8.0966e-06
2.217e-08
d
yr
n .2930081339396994 1.9309e-09 deg/d
Q 2.596245028668632 1.1406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1275  
   data-arc span      16248 days (44.48 yr)  
   first obs. used      1971-02-18  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51472  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:25:00  

Additional Information
 Earth MOID = .908405 au 
 Jupiter MOID = 2.44292 au 
 T_jup = 3.614 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO272679  
rotation period rot_per 3.1329 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

8505 (1990 YK)          Discovered 1990-Dec-19 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 YK = 1971 DP1 = 1981 CE1 = 1988 GP 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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