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18256 (4195 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018256
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07816317275298164 3.8189e-08  
a 2.728679378545783 1.2811e-08 au
q 2.515397140893011 1.0403e-07 au
i 3.436124059226715 4.0251e-06 deg
node 130.8696857042412 6.2438e-05 deg
peri 193.8943839281738 6.7007e-05 deg
M 164.3398084377042 2.5012e-05 deg
tp 2458248.933410165204
(2018-May-10.43341017)
0.00011439 TDB
period 1646.369038108551
4.51
1.1595e-05
3.175e-08
d
yr
n .2186630042639711 1.54e-09 deg/d
Q 2.941961616198556 1.3813e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1403  
   data-arc span      16937 days (46.37 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52672  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:22:15  

Additional Information
 Earth MOID = 1.50331 au 
 Jupiter MOID = 2.29471 au 
 T_jup = 3.348 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456673.5 (2014-Jan-16.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07952279492505923 3.8365e-08  
q 2.510749218154746 1.0462e-07 au
tp 2456595.116869072078
(2013-Oct-29.61686907)
0.00011276 TDB
node 130.9371767764908 6.2348e-05 deg
peri 192.2299358435985 6.6748e-05 deg
i 3.437893285903096 4.0301e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1403  
   data-arc span      16937 days (46.37 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52672  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:22:15  

Additional Information
 Jupiter MOID = 2.29471 au 
 T_jup = 3.348 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.47187883804945E-15 -3.988779426113996E-15 7.75199331905741E-13 -3.769535895985527E-16 1.398794608207003E-13 -7.036729446666443E-17
q -3.988779426113996E-15 1.094545033928522E-14 -2.250121483705504E-12 8.61770302101989E-16 -4.100262049676446E-13 3.344345882802052E-16
tp 7.75199331905741E-13 -2.250121483705504E-12 1.271378124955397E-8 -5.642500675331293E-12 2.702749211675168E-9 -1.683013779646939E-12
node -3.769535895985527E-16 8.61770302101989E-16 -5.642500675331293E-12 3.887279552418571E-9 -3.881172331567825E-9 3.257662244388318E-11
peri 1.398794608207003E-13 -4.100262049676446E-13 2.702749211675168E-9 -3.881172331567825E-9 4.455352469488382E-9 -3.287649779630251E-11
i -7.036729446666443E-17 3.344345882802052E-16 -1.683013779646939E-12 3.257662244388318E-11 -3.287649779630251E-11 1.6241408868518E-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 14.5   n/a MPO319313  

18256 (4195 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 4195 T-2 = 1999 JW122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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