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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 130 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4305588716168578 1.6427e-09  
a 1.157113899594999 4.0879e-09 au
q .6589082446531941 2.5729e-09 au
i .3402453412260451 1.1612e-06 deg
node 35.91984441292271 4.066e-05 deg
peri 273.5848485310565 4.0634e-05 deg
M 160.5509757053758 1.5555e-05 deg
tp 2458997.744314550183
(2020-May-28.24431455)
1.857e-05 TDB
period 454.6347130015611
1.24
2.4092e-06
6.596e-09
d
yr
n .7918445066001017 4.1962e-09 deg/d
Q 1.655319554536804 5.8479e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .21898  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:07:57  

Additional Information
 Earth MOID = .000451408 au 
 Jupiter MOID = 3.61934 au 
 T_jup = 5.348 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455688.5 (2011-May-07.0) TDB
Reference: JPL 130 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4289728374932423 1.6062e-09  
q .6525298004124104 1.4973e-09 au
tp 2455814.317148241590
(2011-Sep-09.81714824)
9.6612e-08 TDB
node 39.31317037856557 1.6829e-05 deg
peri 268.7770020819057 1.6831e-05 deg
i .5134934772640242 1.1653e-06 deg
  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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .21898  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:07:57  

Additional Information
 Jupiter MOID = 3.61934 au 
 T_jup = 5.348 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.579808940130712E-18 -2.396598720877358E-18 1.063160880876374E-16 -3.983112143158095E-15 3.885563270268315E-15 1.412978590267436E-16
q -2.396598720877358E-18 2.241799131258883E-18 -9.211596935105568E-17 4.832953695673338E-15 -4.749065685271149E-15 -1.222650620611384E-16
tp 1.063160880876374E-16 -9.211596935105568E-17 9.33386718716401E-15 3.628812859125237E-13 -3.687213909065926E-13 9.01023724142524E-15
node -3.983112143158095E-15 4.832953695673338E-15 3.628812859125237E-13 2.832305491895699E-10 -2.832543208365215E-10 1.545265364481021E-11
peri 3.885563270268315E-15 -4.749065685271149E-15 -3.687213909065926E-13 -2.832543208365215E-10 2.832872329803614E-10 -1.542952928552821E-11
i 1.412978590267436E-16 -1.222650620611384E-16 9.01023724142524E-15 1.545265364481021E-11 -1.542952928552821E-11 1.358029289560447E-12

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

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