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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1566580051686005 4.5023e-08  
a 2.245136081543329 9.968e-09 AU
q 1.893417541676703 9.9673e-08 AU
i 2.297017324951187 6.1953e-06 deg
node 172.2181452668127 0.00011403 deg
peri 322.6280557105721 0.00011606 deg
M 22.28662221142572 2.1438e-05 deg
tp 2456924.431617511104
(2014-Sep-23.93161751)
7.3016e-05 JED
period 1228.746888434411
3.36
8.1831e-06
2.24e-08
d
yr
n .29298141333134 1.9512e-09 deg/d
Q 2.596854621409955 1.153e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1240  
   data-arc span      16189 days (44.32 yr)  
   first obs. used      1971-02-18  
   last obs. used      2015-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51931  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:59:34  

Additional Information
 Earth MOID = .90832 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-July); 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., in press.]

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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