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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2217984045426764 4.7439e-08  
a 2.362109817237835 6.3552e-09 au
q 1.83819762841989 1.1381e-07 au
i 3.096510296616263 4.4761e-06 deg
node 130.4597981488887 8.4583e-05 deg
peri 228.0903609504036 8.519e-05 deg
M 59.69966264931628 8.8256e-06 deg
tp 2458780.603695898858
(2019-Oct-24.10369590)
3.2289e-05 TDB
period 1326.015356927946
3.63
5.3514e-06
1.465e-08
d
yr
n .2714900684363357 1.0957e-09 deg/d
Q 2.886022006055779 7.7648e-09 au
  Orbit Determination Parameters
   # obs. used (total)      594  
   data-arc span      15068 days (41.25 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:14:07  

Additional Information
 Earth MOID = .836096 au 
 Jupiter MOID = 2.56376 au 
 T_jup = 3.515 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456979.5 (2014-Nov-18.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .223371177026056 4.755e-08  
q 1.833567322215958 1.1421e-07 au
tp 2457454.646582269378
(2016-Mar-07.14658227)
3.0886e-05 TDB
node 130.5388779342305 8.465e-05 deg
peri 228.0246194076923 8.5239e-05 deg
i 3.096368677753942 4.4776e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      594  
   data-arc span      15068 days (41.25 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:14:07  

Additional Information
 Jupiter MOID = 2.56376 au 
 T_jup = 3.515 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.260999060190629E-15 -5.426038558797952E-15 -8.530723601372014E-14 1.309132448538728E-14 -1.054269889778739E-14 -3.526136134387483E-15
q -5.426038558797952E-15 1.304327705167407E-14 2.115779882328292E-13 -3.238052263640501E-14 2.439569425617934E-14 8.544739022442242E-15
tp -8.530723601372014E-14 2.115779882328292E-13 9.539396939437655E-10 -7.500720461708455E-12 3.280159501468687E-10 -8.39516236693261E-14
node 1.309132448538728E-14 -3.238052263640501E-14 -7.500720461708455E-12 7.165538882511519E-9 -7.155878376934379E-9 1.062765148840843E-10
peri -1.054269889778739E-14 2.439569425617934E-14 3.280159501468687E-10 -7.155878376934379E-9 7.265704374915789E-9 -1.062460328118739E-10
i -3.526136134387483E-15 8.544739022442242E-15 -8.39516236693261E-14 1.062765148840843E-10 -1.062460328118739E-10 2.004883611262894E-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

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