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40776 Yeungkwongyu (1999 TA21)
Classification: Main-belt Asteroid          SPK-ID: 2040776
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07648963182923259 3.2605e-08  
a 2.941557878155835 1.309e-08 au
q 2.716559199051316 9.8501e-08 au
i 3.279613619554579 4.2703e-06 deg
node 344.6740072058994 6.6129e-05 deg
peri 95.61280561367373 7.3757e-05 deg
M 344.2489470898985 3.0995e-05 deg
tp 2459081.125350094892
(2020-Aug-19.62535009)
0.00015869 TDB
period 1842.741955082038
5.05
1.2301e-05
3.368e-08
d
yr
n .1953610482504985 1.3041e-09 deg/d
Q 3.166556557260353 1.4092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1500  
   data-arc span      10858 days (29.73 yr)  
   first obs. used      1991-02-20  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52771  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:42:08  

Additional Information
 Earth MOID = 1.73477 au 
 Jupiter MOID = 2.0032 au 
 T_jup = 3.266 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO359000  
rotation period rot_per 3.098 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

40776 Yeungkwongyu           Discovered 1999 Oct. 7 by R. A. Tucker at Goodricke-Pigott.
Canadian amateur astronomer William Kwong Yu Yeung (b. 1960), is one of the world's most prolific amateur discoverers of asteroids. He has also found comets and J002E3, believed to be the Apollo 12 S-IVB stage.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-06-09Last Updated: 2017-06-12

Alternate Designations
 1999 TA21 = 1994 UB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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