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52172 (2166 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2052172
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06946945823459622 3.5392e-08  
a 3.184041789575593 1.9677e-08 au
q 2.962848131457462 1.1735e-07 au
i 4.622975756539761 4.9815e-06 deg
node 359.8340756092471 4.6195e-05 deg
peri 126.2678882882915 6.0987e-05 deg
M 29.96118474586036 3.7493e-05 deg
tp 2459223.787787657046
(2021-Jan-09.28778766)
0.00021635 TDB
period 2075.231569474373
5.68
1.9237e-05
5.267e-08
d
yr
n .1734746161803923 1.6081e-09 deg/d
Q 3.405235447693724 2.1044e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1434  
   data-arc span      17398 days (47.63 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-05-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:52:41  

Additional Information
 Earth MOID = 1.98154 au 
 Jupiter MOID = 1.62727 au 
 T_jup = 3.190 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457174.5 (2015-Jun-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06931904244722649 3.629e-08  
q 2.964793765138217 1.2113e-07 au
tp 2457165.306633435937
(2015-May-22.80663344)
0.00021629 TDB
node 359.8829261057052 4.6201e-05 deg
peri 129.1069423591467 6.0531e-05 deg
i 4.624059955748349 4.9777e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1434  
   data-arc span      17398 days (47.63 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-05-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:52:41  

Additional Information
 Jupiter MOID = 1.62727 au 
 T_jup = 3.190 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.316991471852278E-15 -4.345735673577756E-15 2.363869686021471E-12 -3.642217797332755E-15 4.260516700421372E-13 -7.83370988793478E-16
q -4.345735673577756E-15 1.467150952599215E-14 -8.670124049981823E-12 1.164301867849122E-14 -1.560959019672712E-12 2.527816175109696E-15
tp 2.363869686021471E-12 -8.670124049981823E-12 4.677966626792012E-8 -2.689820454483484E-11 8.472081728237075E-9 1.520400395864223E-12
node -3.642217797332755E-15 1.164301867849122E-14 -2.689820454483484E-11 2.134544183441538E-9 -2.132401962930927E-9 1.769254713073482E-11
peri 4.260516700421372E-13 -1.560959019672712E-12 8.472081728237075E-9 -2.132401962930927E-9 3.663956788413642E-9 -1.737342673414258E-11
i -7.83370988793478E-16 2.527816175109696E-15 1.520400395864223E-12 1.769254713073482E-11 -1.737342673414258E-11 2.477779230767468E-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 14.07   n/a MPCxxxxx  
diameter diameter 10.367 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52172 (2166 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2166 T-2 = 1999 FS24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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