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85172 (1990 QU6)
Classification: Main-belt Asteroid          SPK-ID: 2085172
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2217984010543907 4.7532e-08  
a 2.362109817558769 6.3624e-09 au
q 1.838197636909356 1.1404e-07 au
i 3.096510366417994 4.4775e-06 deg
node 130.4598015381065 8.4787e-05 deg
peri 228.0903566555638 8.5396e-05 deg
M 59.69966309260505 8.8335e-06 deg
tp 2458780.603694221244
(2019-Oct-24.10369422)
3.232e-05 TDB
period 1326.01535719819
3.63
5.3575e-06
1.467e-08
d
yr
n .2714900683810054 1.0969e-09 deg/d
Q 2.886021998208183 7.7736e-09 au
  Orbit Determination Parameters
   # obs. used (total)      590  
   data-arc span      15043 days (41.19 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:50  

Additional Information
 Earth MOID = .836096 au 
 Jupiter MOID = 2.56376 au 
 T_jup = 3.515 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456968.5 (2014-Nov-07.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2233711509604497 4.7644e-08  
q 1.833559998968096 1.1444e-07 au
tp 2457454.651622268032
(2016-Mar-07.15162227)
3.0929e-05 TDB
node 130.5389530068757 8.4854e-05 deg
peri 228.0260831316441 8.5445e-05 deg
i 3.096369357151482 4.4789e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      590  
   data-arc span      15043 days (41.19 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:50  

Additional Information
 Jupiter MOID = 2.56376 au 
 T_jup = 3.515 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.269918397660891E-15 -5.447783009609867E-15 -8.034374151238572E-14 1.291322013278973E-14 -8.046118790066849E-15 -3.548602690318469E-15
q -5.447783009609867E-15 1.309629391433614E-14 1.993743343560571E-13 -3.195099109064763E-14 1.826944293135209E-14 8.59961601531083E-15
tp -8.034374151238572E-14 1.993743343560571E-13 9.566106824085309E-10 -7.478233207553118E-12 3.292594332298932E-10 -9.391977324950183E-14
node 1.291322013278973E-14 -3.195099109064763E-14 -7.478233207553118E-12 7.200222160810354E-9 -7.190502681757115E-9 1.069163734838978E-10
peri -8.046118790066849E-15 1.826944293135209E-14 3.292594332298932E-10 -7.190502681757115E-9 7.300868179593145E-9 -1.068897023636408E-10
i -3.548602690318469E-15 8.59961601531083E-15 -9.391977324950183E-14 1.069163734838978E-10 -1.068897023636408E-10 2.006069046669244E-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 16.3   n/a MPO493473  

85172 (1990 QU6)          Discovered 1990-Aug-20 by Elst, E. W. at La Silla
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1990 QU6 = 2001 SS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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