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499123 (2009 KZ2)
Classification: Main-belt Asteroid          SPK-ID: 2499123
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2554218552714256 6.7983e-08  
a 2.41145542134617 1.7521e-08 au
q 1.795517003721594 1.6746e-07 au
i 11.44097252258361 9.6868e-06 deg
node 38.41721162331608 5.221e-05 deg
peri 198.3705750131039 5.7872e-05 deg
M 342.1351676150854 2.323e-05 deg
tp 2459068.375607361364
(2020-Aug-06.87560736)
8.8465e-05 TDB
period 1367.78325839343
3.74
1.4907e-05
4.081e-08
d
yr
n .2631995952508211 2.8686e-09 deg/d
Q 3.027393838970746 2.1997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      5545 days (15.18 yr)  
   first obs. used      2005-03-16  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 01:22:09  

Additional Information
 Earth MOID = .788297 au 
 Jupiter MOID = 1.98971 au 
 T_jup = 3.448 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457979.5 (2017-Aug-14.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2554827503065114 6.8045e-08  
q 1.795578171951764 1.6763e-07 au
tp 2457699.565105337873
(2016-Nov-07.06510534)
8.5275e-05 TDB
node 38.42994931440273 5.2195e-05 deg
peri 198.2168407380885 5.7853e-05 deg
i 11.44261972158503 9.6892e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      5545 days (15.18 yr)  
   first obs. used      2005-03-16  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 01:22:09  

Additional Information
 Jupiter MOID = 1.98971 au 
 T_jup = 3.448 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.630147049566808E-15 -1.137368815610988E-14 -2.294688314062519E-12 -3.797781466372686E-14 -3.908902169803877E-13 -1.271081522676854E-14
q -1.137368815610988E-14 2.810030323490724E-14 5.67723363781269E-12 1.018428940504856E-13 9.79201920410387E-13 3.111524907325468E-14
tp -2.294688314062519E-12 5.67723363781269E-12 7.271875151002605E-9 -1.239453140243611E-11 2.220324848960157E-9 4.645464416869095E-11
node -3.797781466372686E-14 1.018428940504856E-13 -1.239453140243611E-11 2.724293218473512E-9 -2.676132334417963E-9 -3.464775473737653E-10
peri -3.908902169803877E-13 9.79201920410387E-13 2.220324848960157E-9 -2.676132334417963E-9 3.34695037075173E-9 3.535697265704496E-10
i -1.271081522676854E-14 3.111524907325468E-14 4.645464416869095E-11 -3.464775473737653E-10 3.535697265704496E-10 9.387967879948823E-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 MPO158355  

499123 (2009 KZ2)          Discovered 2009-May-20 by Lowe, A. at Mayhill
Reference: Last Updated: 2017-10-09

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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
1917-May-13 19:53 00:03 Jupiter 1.9902781610592 1.99027747423671 1.99027884791111 2.92893169403848 2.77983469519863 2421362.328798381 2.85555883573758 609.986260570132 8.27018888059775 -86.497976823916 1352394.49226961 T 12 CATAB v2.0f-lin.ifort 2020-Nov-12 01:22:09 2020-Nov-12 01:22
1988-Aug-20 02:32 < 00:01 Jupiter 1.99585970107424 1.99585910146502 1.99586030069253 2.87361878582343 2.7219304380827 2447393.605407834 0.905139708817013 449.229400685811 9.05684670134758 -86.6664393516482 1366311.57165071 T 12 CATAB v2.0f-lin.ifort 2020-Nov-12 01:22:09 2020-Nov-12 01:22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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