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10280 Yequanzhi (1981 EA43)
Classification: Main-belt Asteroid          SPK-ID: 2010280
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1966210446841521 2.807e-08  
a 2.36338707313474 5.7531e-09 au
q 1.898695437821967 6.7653e-08 au
i 1.492899906338076 3.8109e-06 deg
node 329.5580136688554 0.00011526 deg
peri 78.84681660013803 0.00011574 deg
M 39.79088501903835 9.4746e-06 deg
tp 2458853.816316125099
(2020-Jan-05.31631612)
3.4847e-05 TDB
period 1327.091020209748
3.63
4.8457e-06
1.327e-08
d
yr
n .2712700142776203 9.9051e-10 deg/d
Q 2.828078708447513 6.8842e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      15712 days (43.02 yr)  
   first obs. used      1977-02-11  
   last obs. used      2020-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:07:27  

Additional Information
 Earth MOID = .909445 au 
 Jupiter MOID = 2.55654 au 
 T_jup = 3.523 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456964.5 (2014-Nov-03.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964909063891729 2.8139e-08  
q 1.898881053364869 6.7817e-08 au
tp 2457523.967266709548
(2016-May-15.46726671)
3.4525e-05 TDB
node 329.846526799996 0.00011497 deg
peri 78.03023952201985 0.00011545 deg
i 1.495105997944725 3.8154e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      15712 days (43.02 yr)  
   first obs. used      1977-02-11  
   last obs. used      2020-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:07:27  

Additional Information
 Jupiter MOID = 2.55654 au 
 T_jup = 3.523 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.917995752053572E-16 -1.904184827414028E-15 -2.74640277681576E-13 5.394558885672151E-15 -7.603629695932412E-14 -6.072749033278639E-16
q -1.904184827414028E-15 4.599194475203268E-15 6.559056197716574E-13 -1.306799174235655E-14 1.792826999170901E-13 1.511785445715844E-15
tp -2.74640277681576E-13 6.559056197716574E-13 1.19197099949386E-9 -6.441164726396237E-12 3.704386297791881E-10 8.238073000380431E-13
node 5.394558885672151E-15 -1.306799174235655E-14 -6.441164726396237E-12 1.321745949491824E-8 -1.321438912546645E-8 7.578565024868411E-11
peri -7.603629695932412E-14 1.792826999170901E-13 3.704386297791881E-10 -1.321438912546645E-8 1.332873290070384E-8 -7.554351020033029E-11
i -6.072749033278639E-16 1.511785445715844E-15 8.238073000380431E-13 7.578565024868411E-11 -7.554351020033029E-11 1.455748770189382E-11

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 15.3   n/a MPO449014  

10280 Yequanzhi           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Quan-Zhi Ye (b. 1988) is a postdoctoral researcher at the California Institute of Technology who studies the transitions between asteroids and comets and associated meteor streams.
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 2017-03-12Last Updated: 2017-04-19

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