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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07830279838299664 3.6472e-08  
a 2.72830764948706 1.2024e-08 au
q 2.514673525682487 1.0042e-07 au
i 3.436288813950194 3.8801e-06 deg
node 130.8702318182157 6.109e-05 deg
peri 193.9766464059135 6.5572e-05 deg
M 207.9817649218359 2.4809e-05 deg
tp 2459895.574927705972
(2022-Nov-12.07492771)
0.00011388 TDB
period 1646.032621319997
4.51
1.0882e-05
2.979e-08
d
yr
n .2187076946939888 1.4458e-09 deg/d
Q 2.941941773291632 1.2966e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1505  
   data-arc span      17352 days (47.51 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:16  

Additional Information
 Earth MOID = 1.50064 au 
 Jupiter MOID = 2.29441 au 
 T_jup = 3.348 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456907.5 (2014-Sep-07.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07938332467446836 3.6553e-08  
q 2.510710565996017 1.0073e-07 au
tp 2456594.838630145798
(2013-Oct-29.33863015)
0.00011156 TDB
node 130.9382793234966 6.1008e-05 deg
peri 192.1612538355268 6.5373e-05 deg
i 3.437937093768541 3.8846e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1505  
   data-arc span      17352 days (47.51 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:16  

Additional Information
 Jupiter MOID = 2.29441 au 
 T_jup = 3.348 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.336108482006083E-15 -3.6600826925347E-15 9.349112255716614E-13 -8.534702210327816E-16 1.835052354111368E-13 -5.974075603454467E-17
q -3.6600826925347E-15 1.0146366185357E-14 -2.619599377245555E-12 2.371039839424942E-15 -5.118067811966669E-13 2.672048079559529E-16
tp 9.349112255716614E-13 -2.619599377245555E-12 1.244596608098175E-8 -8.636758982623214E-12 2.635685041260193E-9 -1.207393048786932E-12
node -8.534702210327816E-16 2.371039839424942E-15 -8.636758982623214E-12 3.721998111287389E-9 -3.716850094110293E-9 4.320824230169646E-11
peri 1.835052354111368E-13 -5.118067811966669E-13 2.635685041260193E-9 -3.716850094110293E-9 4.2736190483312E-9 -4.338170829113218E-11
i -5.974075603454467E-17 2.672048079559529E-16 -1.207393048786932E-12 4.320824230169646E-11 -4.338170829113218E-11 1.508978696666334E-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 14.54   n/a MPCxxxxx  

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

Alternate Designations
 4195 T-2 = 1999 JW122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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