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(2012 UK171)
Classification: Aten [NEO]          SPK-ID: 3615463
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223792252298284 3.5854e-08  
a .8589717002757072 1.67e-09 au
q .6679542390740472 3.1321e-08 au
i 1.331185027784255 1.6719e-06 deg
node 250.8051541753959 3.0424e-05 deg
peri 357.8161168260854 3.3604e-05 deg
M 206.7004257243749 1.0219e-05 deg
tp 2459324.324093872497
(2021-Apr-19.82409387)		 8.276e-06 TDB
period 290.7814584921953
0.80		 8.4801e-07
2.322e-09		 d
yr
n 1.238043174646442 3.6105e-09 deg/d
Q 1.049989161477368 2.0414e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.803380800339238E-14 6.719E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
   Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      3002 days (8.22 yr)  
   first obs. used      2012-10-25  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41663  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-06 05:24:26  

Additional Information
 Earth MOID = .0139922 au 
 Jupiter MOID = 3.95919 au 
 T_jup = 6.850 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458153.5 (2018-Feb-04.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2219904174031725 3.6192e-08  
q .6685038727410821 3.1692e-08 au
tp 2458160.782225716474
(2018-Feb-11.28222572)		 8.5848e-06 TDB
node 250.8360076773987 3.041e-05 deg
peri 357.8440144043413 3.3598e-05 deg
i 1.331226712418684 1.6719e-06 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.803380800339238E-14 6.719E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
   Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      3002 days (8.22 yr)  
   first obs. used      2012-10-25  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41663  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-06 05:24:26  

Additional Information
 Jupiter MOID = 3.95919 au 
 T_jup = 6.850 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
Orbit Covariance (7×7)
  e q tp node peri i A2
e 1.309839280729289E-15 -1.146817728807981E-15 2.575079579448468E-14 1.263168435075555E-13 -1.027581851542763E-13 3.646565217906434E-14 -2.824824865751683E-23
q -1.146817728807981E-15 1.00437770033849E-15 -2.422303819957824E-14 -1.109261582886143E-13 8.930117485198232E-14 -3.174581156513322E-14 2.770632963683687E-23
tp 2.575079579448468E-14 -2.422303819957824E-14 7.369852001348332E-11 -1.001739518686477E-10 1.569789998331809E-10 -1.448923692587806E-12 -6.802608900596393E-21
node 1.263168435075555E-13 -1.109261582886143E-13 -1.001739518686477E-10 9.247463679382569E-10 -1.004106949227529E-9 1.325749584522113E-12 -3.796465532727497E-20
peri -1.027581851542763E-13 8.930117485198232E-14 1.569789998331809E-10 -1.004106949227529E-9 1.128811016748424E-9 -2.538507807308783E-12 3.88442390517557E-20
i 3.646565217906434E-14 -3.174581156513322E-14 -1.448923692587806E-12 1.325749584522113E-12 -2.538507807308783E-12 2.795115947254235E-12 -9.843517430810904E-22
A2 -2.824824865751683E-23 2.770632963683687E-23 -6.802608900596393E-21 -3.796465532727497E-20 3.88442390517557E-20 -9.843517430810904E-22 4.514822020653287E-29

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 24.3   n/a E2021C27  

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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