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11709 Eudoxos (1998 HF20)
Classification: Main-belt Asteroid          SPK-ID: 2011709
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1095909016896751 2.6752e-08  
a 2.602942211620644 8.6883e-09 au
q 2.317683427603021 6.9175e-08 au
i 2.761253401026517 4.1864e-06 deg
node 193.1840959858243 6.3743e-05 deg
peri 97.91100976897565 6.6717e-05 deg
M 89.64138697154348 1.9452e-05 deg
tp 2458818.554600664920
(2019-Dec-01.05460066)
8.2739e-05 TDB
period 1533.893532953457
4.20
7.6799e-06
2.103e-08
d
yr
n .2346968627651965 1.1751e-09 deg/d
Q 2.888200995638267 9.6405e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      15449 days (42.30 yr)  
   first obs. used      1978-10-27  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:55:24  

Additional Information
 Earth MOID = 1.30155 au 
 Jupiter MOID = 2.25745 au 
 T_jup = 3.403 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457284.5 (2015-Sep-19.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .109503996012195 2.6578e-08  
q 2.318567258896399 6.8748e-08 au
tp 2457287.049743498138
(2015-Sep-21.54974350)
8.3231e-05 TDB
node 193.2416803753546 6.3717e-05 deg
peri 98.60627813635641 6.6728e-05 deg
i 2.761334354621529 4.1878e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      15449 days (42.30 yr)  
   first obs. used      1978-10-27  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:55:24  

Additional Information
 Jupiter MOID = 2.25745 au 
 T_jup = 3.403 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.064095496178681E-16 -1.81562302907181E-15 -2.883536215682983E-13 2.272247330323212E-15 -8.573761864397828E-14 -2.014674627089197E-16
q -1.81562302907181E-15 4.726225047948938E-15 7.15422771870868E-13 -5.454995178843042E-15 2.136317078455982E-13 7.124466083695011E-16
tp -2.883536215682983E-13 7.15422771870868E-13 6.927355270228555E-9 -2.117143082999132E-12 1.657134873169406E-9 9.837338321274158E-13
node 2.272247330323212E-15 -5.454995178843042E-15 -2.117143082999132E-12 4.059869263958862E-9 -4.0553919075076E-9 5.782601723273078E-11
peri -8.573761864397828E-14 2.136317078455982E-13 1.657134873169406E-9 -4.0553919075076E-9 4.452639271975505E-9 -5.750156862989882E-11
i -2.014674627089197E-16 7.124466083695011E-16 9.837338321274158E-13 5.782601723273078E-11 -5.750156862989882E-11 1.753803119745263E-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 14.82   n/a E2021B10  
diameter diameter 4.470 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.64 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:
[Warner, B.D. (2013) Minor Planet Bull. 40, 71-80.]
geometric albedo albedo 0.117   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11709 Eudoxos           Discovered 1998 Apr. 27 by P. G. Comba at Prescott.
Eudoxos of Knidos (c. 408-355 B.C.) was the prime mover behind two major developments in Greek mathematical thought: the theory of proportions that overcame the crisis caused by the discovery of irrational numbers, and the method of exhaustion for the calculation of areas and volumes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19991123/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1998 HF20 = 1978 US7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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