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18231 (3286 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2018231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257510302719927 5.0243e-08  
a 2.731916787912029 1.3334e-08 au
q 2.388375437214738 1.3936e-07 au
i 13.22049786243035 6.1831e-06 deg
node 6.570510682766884 1.8282e-05 deg
peri 129.4752958702633 3.1334e-05 deg
M 43.08360422464725 2.2682e-05 deg
tp 2459003.117268721497
(2020-Jun-02.61726872)
0.00010378 TDB
period 1649.299879595741
4.52
1.2075e-05
3.306e-08
d
yr
n .2182744353854191 1.5981e-09 deg/d
Q 3.075458138609319 1.5011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      18261 days (50.00 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55099  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:08  

Additional Information
 Earth MOID = 1.42276 au 
 Jupiter MOID = 1.97314 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457013.5 (2014-Dec-22.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257742218336198 5.0841e-08  
q 2.387975049880888 1.4108e-07 au
tp 2457357.025544630390
(2015-Nov-30.52554463)
0.00010235 TDB
node 6.598609271370404 1.8285e-05 deg
peri 130.2313131357215 3.1102e-05 deg
i 13.22072626527324 6.1829e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      18261 days (50.00 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55099  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:08  

Additional Information
 Jupiter MOID = 1.97314 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.584812860146993E-15 -7.148683550280314E-15 2.508325969809741E-12 -6.963347246792342E-15 6.493903966315338E-13 -6.410876808057849E-15
q -7.148683550280314E-15 1.99024798862756E-14 -6.915502145395329E-12 2.029311955376082E-14 -1.800562448399562E-12 1.891768046606651E-14
tp 2.508325969809741E-12 -6.915502145395329E-12 1.047559556897499E-8 -3.17595650419606E-11 2.58613541695314E-9 6.016682060776094E-12
node -6.963347246792342E-15 2.029311955376082E-14 -3.17595650419606E-11 3.343348309828227E-10 -3.326009159688622E-10 -1.499229654328808E-11
peri 6.493903966315338E-13 -1.800562448399562E-12 2.58613541695314E-9 -3.326009159688622E-10 9.673449166325453E-10 1.597768071614072E-11
i -6.410876808057849E-15 1.891768046606651E-14 6.016682060776094E-12 -1.499229654328808E-11 1.597768071614072E-11 3.822876368378743E-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 14.66   n/a E2021B10  
rotation period rot_per 31.7696 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18231 (3286 T-1)          Discovered 1971-Mar-26 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2140-Jul-06 07:47 00:03 Jupiter 1.98821348864158 1.98821275444065 1.98821422284284 4.0771466966348 3.97128208046847 2502865.824119237 2.51579781500558 221.078818752166 37.7718906616202 -88.0366346374583 2212836.52330292 T 27 CATAB v2.0g-lin.ifort 2021-May-04 02:42:13 2021-May-04 02:42

Alternate Designations
 3286 T-1 = 2019 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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