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18255 (4188 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018255
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03226890182761289 3.2331e-08  
a 2.733725524277902 1.3528e-08 au
q 2.645511203711339 8.9795e-08 au
i 3.15553271898441 3.8909e-06 deg
node 124.8786264303178 7.9189e-05 deg
peri 333.3545123050567 0.00010757 deg
M 71.7866238533762 7.3184e-05 deg
tp 2458871.290911360069
(2020-Jan-22.79091136)
0.00033518 TDB
period 1650.938093320033
4.52
1.2255e-05
3.355e-08
d
yr
n .2180578432689991 1.6186e-09 deg/d
Q 2.821939844844465 1.3965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1146  
   data-arc span      17344 days (47.49 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57743  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:46  

Additional Information
 Earth MOID = 1.66264 au 
 Jupiter MOID = 2.21355 au 
 T_jup = 3.350 
[ show covariance matrix ]

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 14.84   n/a E2021B10  

18255 (4188 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
 4188 T-2 = 1989 EB11 = 1998 DW21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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