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JPL Small-Body Database Browser
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52171 (2127 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2052171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0265830039295221 3.9053e-08  
a 2.550000211047141 1.4688e-08 au
q 2.482213545416593 9.531e-08 au
i 1.97216745629171 4.9055e-06 deg
node 325.04922317917 0.00014125 deg
peri 315.9572336960024 0.00021192 deg
M 248.672572818654 0.00016281 deg
tp 2459460.447669991311
(2021-Sep-02.94766999)
0.00067388 TDB
period 1487.334840920646
4.07
1.285e-05
3.518e-08
d
yr
n .2420436811506166 2.0912e-09 deg/d
Q 2.617786876677689 1.5078e-08 au
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      16819 days (46.05 yr)  
   first obs. used      1973-09-20  
   last obs. used      2019-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59045  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:56:16  

Additional Information
 Earth MOID = 1.46623 au 
 Jupiter MOID = 2.40154 au 
 T_jup = 3.439 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456506.5 (2013-Aug-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02789241979540157 3.8948e-08  
q 2.479303398905634 9.5341e-08 au
tp 2456480.218307273232
(2013-Jul-06.71830727)
0.00063619 TDB
node 325.1341875158478 0.00014097 deg
peri 314.676665101658 0.00020636 deg
i 1.974896107389892 4.9073e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      16819 days (46.05 yr)  
   first obs. used      1973-09-20  
   last obs. used      2019-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59045  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:56:16  

Additional Information
 Jupiter MOID = 2.40154 au 
 T_jup = 3.439 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.516930794215747E-15 -3.677133373756355E-15 4.521521205384976E-12 -6.919283954521724E-15 1.067166453152499E-12 2.385940945390342E-16
q -3.677133373756355E-15 9.089995392400978E-15 -8.962268343436276E-12 1.470102048131971E-14 -2.112944777289117E-12 -6.28041583473202E-16
tp 4.521521205384976E-12 -8.962268343436276E-12 4.04739289791875E-7 -9.377733279380537E-11 9.590350194154021E-8 -3.20724442624909E-11
node -6.919283954521724E-15 1.470102048131971E-14 -9.377733279380537E-11 1.987165221700056E-8 -1.988172824082809E-8 1.890395755779853E-10
peri 1.067166453152499E-12 -2.112944777289117E-12 9.590350194154021E-8 -1.988172824082809E-8 4.258331016339347E-8 -1.965274369838704E-10
i 2.385940945390342E-16 -6.28041583473202E-16 -3.20724442624909E-11 1.890395755779853E-10 -1.965274369838704E-10 2.408181972757881E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.3   n/a MPO266194  

52171 (2127 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

Alternate Designations
 2127 T-2 = 1977 RE12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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