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305785 (2009 DK56)
Classification: Main-belt Asteroid          SPK-ID: 2305785
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .112092813658871 7.4412e-08  
a 2.455145049207015 2.3075e-08 au
q 2.179940932700754 1.8806e-07 au
i 5.842610064451979 6.0463e-06 deg
node 140.1838312032429 7.9255e-05 deg
peri 267.0554515061174 8.7812e-05 deg
M 80.08176363608082 3.5254e-05 deg
tp 2458687.931442909782
(2019-Jul-23.43144291)
0.00013646 TDB
period 1405.122407940831
3.85
1.981e-05
5.424e-08
d
yr
n .2562054365979192 3.612e-09 deg/d
Q 2.730349165713277 2.5662e-08 au
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      5467 days (14.97 yr)  
   first obs. used      2003-08-25  
   last obs. used      2018-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .69539  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:09:35  

Additional Information
 Earth MOID = 1.19886 au 
 Jupiter MOID = 2.6108 au 
 T_jup = 3.477 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457025.5 (2015-Jan-03.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110868091340283 7.3782e-08  
q 2.182698781382864 1.8621e-07 au
tp 2457279.797765929420
(2015-Sep-14.29776593)
0.00013545 TDB
node 140.2669120190948 7.9154e-05 deg
peri 266.3141989204458 8.8028e-05 deg
i 5.844912491287552 6.0485e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      5467 days (14.97 yr)  
   first obs. used      2003-08-25  
   last obs. used      2018-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .69539  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:09:35  

Additional Information
 Jupiter MOID = 2.6108 au 
 T_jup = 3.477 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.443792823602354E-15 -1.365933693951211E-14 3.354070502428163E-12 1.91493637797982E-15 9.236058322833614E-13 -2.562138107411389E-14
q -1.365933693951211E-14 3.467559987157782E-14 -7.910769271809316E-12 -5.293535942623144E-15 -2.195629429014671E-12 6.498489907406544E-14
tp 3.354070502428163E-12 -7.910769271809316E-12 1.83468691315494E-8 9.077485257199051E-12 5.289640852360057E-9 -2.52022449733476E-11
node 1.91493637797982E-15 -5.293535942623144E-15 9.077485257199051E-12 6.265391688484296E-9 -6.230217982184114E-9 -1.521653115591882E-10
peri 9.236058322833614E-13 -2.195629429014671E-12 5.289640852360057E-9 -6.230217982184114E-9 7.748913421387287E-9 1.442524012916621E-10
i -2.562138107411389E-14 6.498489907406544E-14 -2.52022449733476E-11 -1.521653115591882E-10 1.442524012916621E-10 3.658462618525704E-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 17.3   n/a MPO455253  

305785 (2009 DK56)          Discovered 2009-Feb-22 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1983-Oct-08 20:49 00:02 Iris 0.0492707645454692 0.0492665418022283 0.0492749892147679 3.85124739478536 3.85124736448957 2445616.367482085 1.68747635100569 614.836146815337 114.073562057001 -72.9693028470531 61843.9189700498 T 7 CATAB v2.0e-lin.ifort 2019-Jul-14 12:09:37 2019-Jul-14 12:09

Alternate Designations
 2009 DK56 = 2005 CU66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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