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JPL Small-Body Database Browser
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308635 (2005 YU55)
Classification: Apollo [NEO, PHA]          SPK-ID: 2308635
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 129 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4305000278190969 1.6471e-09  
a 1.157105012303321 4.1862e-09 au
q .6589712723171246 2.5998e-09 au
i .3402557461524296 1.1612e-06 deg
node 35.93157241314612 4.0648e-05 deg
peri 273.5602720904989 4.0622e-05 deg
M 45.44750067491421 1.2995e-05 deg
tp 2458543.106185048701
(2019-Feb-28.60618505)
1.6099e-05 TDB
period 454.6294752325594
1.24
2.4672e-06
6.755e-09
d
yr
n .791853629410735 4.2972e-09 deg/d
Q 1.655238752289517 5.9884e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3993  
   # delay obs. used      9  
   # Doppler obs. used      10  
   data-arc span      4019 days (11.00 yr)  
   first obs. used      2005-12-24  
   last obs. used      2016-12-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .21899  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:16:09  

Additional Information
 Earth MOID = .000466802 au 
 Jupiter MOID = 3.61724 au 
 T_jup = 5.348 
[ 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 21.9   n/a MPO254628  
magnitude slope G -0.12   n/a The Astronomer's Telegram, #3763  
diameter diameter 0.4 km n/a 2010 radar result http://echo.jpl.nasa.gov/asteroids/2005YU55/2005YU55_planning.html
rotation period rot_per 18 h n/a 2010 radar result http://echo.jpl.nasa.gov/asteroids/2005YU55/2005YU55_planning.html
SMASSII spectral type spec_B C   n/a M. Hicks et al., ATel 2571, 2010 also R. Binzel, personal communication

308635 (2005 YU55)          Discovered 2005-Dec-28 by Spacewatch at Kitt Peak
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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