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18258 (4250 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018258
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1203929427044896 4.3303e-08  
a 2.537977781236736 8.5606e-09 au
q 2.232423167635034 1.1212e-07 au
i 14.07019891853507 4.3386e-06 deg
node 176.9089509995078 1.1541e-05 deg
peri 6.000546010745923 1.7165e-05 deg
M 65.8168990541088 1.1498e-05 deg
tp 2458930.499190348663
(2020-Mar-21.99919035)
4.7177e-05 TDB
period 1476.828791258792
4.04
7.472e-06
2.046e-08
d
yr
n .2437655618110952 1.2333e-09 deg/d
Q 2.843532394838438 9.5912e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2137  
   data-arc span      17130 days (46.90 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48354  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:50  

Additional Information
 Earth MOID = 1.23542 au 
 Jupiter MOID = 2.11305 au 
 T_jup = 3.395 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.18   n/a E2021B10  

18258 (4250 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

Alternate Designations
 4250 T-2 = 2000 ES137 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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