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172865 (2005 EC97)
Classification: Main-belt Asteroid          SPK-ID: 2172865
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0808534912028147 6.6033e-08  
a 2.784659474824936 3.0445e-08 au
q 2.559510034474343 1.8864e-07 au
i 6.720424849239139 6.1516e-06 deg
node 302.2625982885886 5.5186e-05 deg
peri 254.6166856899285 6.748e-05 deg
M 65.67043705781035 3.785e-05 deg
tp 2458690.883587192571
(2019-Jul-26.38358719)
0.0001791 TDB
period 1697.292017602279
4.65
2.7835e-05
7.621e-08
d
yr
n .2121025706045344 3.4784e-09 deg/d
Q 3.009808915175528 3.2907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      303  
   data-arc span      6996 days (19.15 yr)  
   first obs. used      2000-02-07  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5783  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 13:01:06  

Additional Information
 Earth MOID = 1.5685 au 
 Jupiter MOID = 2.01187 au 
 T_jup = 3.317 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457302.5 (2015-Oct-07.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0803352465512906 6.5864e-08  
q 2.559177392146455 1.8822e-07 au
tp 2456990.056976136533
(2014-Nov-28.55697614)
0.00018576 TDB
node 302.3006350613753 5.5217e-05 deg
peri 253.506012463704 6.7683e-05 deg
i 6.719600745458755 6.1508e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      303  
   data-arc span      6996 days (19.15 yr)  
   first obs. used      2000-02-07  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5783  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 13:01:06  

Additional Information
 Jupiter MOID = 2.01187 au 
 T_jup = 3.317 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.338115372803267E-15 -1.225828843286325E-14 -3.71103150933312E-13 2.265197787397178E-14 5.377837046238472E-14 1.769418542226974E-15
q -1.225828843286325E-14 3.542500477227168E-14 -4.014832839026087E-13 -6.72814081027737E-14 -4.228968858773448E-13 -4.430820174127407E-15
tp -3.71103150933312E-13 -4.014832839026087E-13 3.450763043484767E-8 1.012828029469632E-12 7.311209344201581E-9 8.98349267178858E-12
node 2.265197787397178E-14 -6.72814081027737E-14 1.012828029469632E-12 3.048957870759568E-9 -3.026284600516601E-9 2.028236475773205E-11
peri 5.377837046238472E-14 -4.228968858773448E-13 7.311209344201581E-9 -3.026284600516601E-9 4.58092862647238E-9 -1.81857332777065E-11
i 1.769418542226974E-15 -4.430820174127407E-15 8.98349267178858E-12 2.028236475773205E-11 -1.81857332777065E-11 3.783194142046413E-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 15.7   n/a MPO469852  

172865 (2005 EC97)          Discovered 2005-Mar-03 by CSS at Catalina
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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