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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1256440007634409 4.3532e-08  
a 2.731413877691889 1.2608e-08 au
q 2.388228110357896 1.1912e-07 au
i 13.221214186709 5.899e-06 deg
node 6.57185530886354 1.7509e-05 deg
peri 129.4085604487711 2.9493e-05 deg
M 85.94346934749527 2.1959e-05 deg
tp 2459002.868291908793
(2020-Jun-02.36829191)
0.00010003 TDB
period 1648.844478687135
4.51
1.1417e-05
3.126e-08
d
yr
n .2183347214690884 1.5118e-09 deg/d
Q 3.074599645025882 1.4193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      18343 days (50.22 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:18  

Additional Information
 Earth MOID = 1.4235 au 
 Jupiter MOID = 1.97357 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457156.5 (2015-May-14.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258413036382368 4.4006e-08  
q 2.387797991554922 1.206e-07 au
tp 2457357.063837874436
(2015-Nov-30.56383787)
9.7509e-05 TDB
node 6.598779685997639 1.7512e-05 deg
peri 130.2477431963768 2.928e-05 deg
i 13.22079211901867 5.8982e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      18343 days (50.22 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:18  

Additional Information
 Jupiter MOID = 1.97357 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.936488998522775E-15 -5.284907270768053E-15 1.722256560170845E-12 -4.647050202828169E-15 4.238322816563219E-13 -4.949530803605709E-15
q -5.284907270768053E-15 1.454367346900946E-14 -4.655325045919031E-12 1.410979973554826E-14 -1.152139482629997E-12 1.451245486849042E-14
tp 1.722256560170845E-12 -4.655325045919031E-12 9.507966292071776E-9 -1.91251325185579E-11 2.299520702491978E-9 4.246379783464322E-12
node -4.647050202828169E-15 1.410979973554826E-14 -1.91251325185579E-11 3.066804621527776E-10 -3.0260187736667E-10 -5.324222206440371E-12
peri 4.238322816563219E-13 -1.152139482629997E-12 2.299520702491978E-9 -3.0260187736667E-10 8.573341372753463E-10 6.247150988318613E-12
i -4.949530803605709E-15 1.451245486849042E-14 4.246379783464322E-12 -5.324222206440371E-12 6.247150988318613E-12 3.478918685846129E-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

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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 00:02 Jupiter 1.9882134823666 1.98821274987235 1.98821421486131 4.07714590294894 3.97128126528632 2502865.823989301 2.38127100097128 203.323841263508 37.4137015849629 -87.4875139354017 2487970.35478631 T 28 CATAB v2.0g-lin.ifort 2021-Jul-08 04:35:24 2021-Jul-08 04:35

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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