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11928 Akimotohiro (1993 BT2)
Classification: Main-belt Asteroid          SPK-ID: 2011928
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082974811292747 1.9941e-08  
a 2.635973840172616 8.122e-09 au
q 2.086907128941999 5.167e-08 au
i 5.435140032872048 2.94e-07 deg
node 328.630342700946 1.1266e-05 deg
peri 195.5914065860672 1.0237e-05 deg
M 162.6497028897647 5.3087e-06 deg
tp 2458494.246123978796
(2019-Jan-10.74612398)
2.1318e-05 TDB
period 1563.183890596785
4.28
7.2248e-06
1.978e-08
d
yr
n .2302992003471587 1.0644e-09 deg/d
Q 3.185040551403233 9.8138e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2405  
   data-arc span      24000 days (65.71 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47989  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:52:42  

Additional Information
 Earth MOID = 1.09512 au 
 Jupiter MOID = 1.80371 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457319.5 (2015-Oct-24.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2067402382939218 1.9928e-08  
q 2.091010457244819 5.1645e-08 au
tp 2456928.065703073514
(2014-Sep-27.56570307)
1.9151e-05 TDB
node 328.7453603873046 1.1294e-05 deg
peri 195.1587478046729 1.0261e-05 deg
i 5.427138174670174 2.9334e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2405  
   data-arc span      24000 days (65.71 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47989  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:52:42  

Additional Information
 Jupiter MOID = 1.80371 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.971170421853845E-16 -1.021733614642929E-15 1.682724999952534E-13 1.03033047200041E-14 -8.658814443117891E-15 -3.659867433189586E-16
q -1.021733614642929E-15 2.667244090522441E-15 -4.214294655448314E-13 -2.573735921728797E-14 2.637512449843091E-14 9.31061221657648E-16
tp 1.682724999952534E-13 -4.214294655448314E-13 3.667660768211106E-10 8.792002133400861E-11 -8.455245385476541E-12 -6.618068604529156E-13
node 1.03033047200041E-14 -2.573735921728797E-14 8.792002133400861E-11 1.275506691083947E-10 -1.057341182480862E-10 6.338741747048419E-13
peri -8.658814443117891E-15 2.637512449843091E-14 -8.455245385476541E-12 -1.057341182480862E-10 1.052908152038759E-10 -7.220705717228111E-13
i -3.659867433189586E-16 9.31061221657648E-16 -6.618068604529156E-13 6.338741747048419E-13 -7.220705717228111E-13 8.604643834494465E-14

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 13.36   n/a E2021B10  
diameter diameter 8.040 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.95683 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.]
geometric albedo albedo 0.177   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

11928 Akimotohiro           Discovered 1993 Jan. 23 by K. Endate and K. Watanabe at Kitami.
Hiroyuki Akimoto (b. 1967) is editor-in-chief of the Japanese monthly astronomical magazine Gekkan Tenmon Guide. He has edited many books on astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02

[ 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
1926-Nov-28 08:26 00:01 Jupiter 1.84341966238672 1.8434192803993 1.84342004437466 2.05023621063388 1.81231889753072 2424847.851216453 1.12638496994117 77.8094357839343 3.20445769847506 -87.7291762370554 5276710.76219459 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
1987-Mar-31 15:35 < 00:01 Jupiter 1.85467240472258 1.85467216212589 1.8546726473197 1.76031765377962 1.47828451689293 2446886.149522948 0.374841971635744 72.2184866252648 13.7003813185885 83.1930561588312 9373663.1320534 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
2033-Dec-22 15:07 < 00:01 Jupiter 1.80649935201869 1.80649916267102 1.80649954136677 1.89803053575425 1.63241225441711 2463954.130067259 0.257824334759602 65.0493706477117 6.33432220939409 85.6530266151531 8657489.26244526 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
2080-Sep-14 20:47 < 00:01 Jupiter 1.95780480678312 1.95780422537561 1.95780538819064 2.34132428994029 2.14860923225336 2481022.366178731 0.850989079650185 31.5410917325168 8.95362213021801 66.9139962070472 4463675.32094184 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
2094-Apr-28 23:30 00:01 Jupiter 1.91780396178513 1.91780345970141 1.91780446386895 1.79582295840887 1.53024659981933 2485996.478997380 1.06944500536659 51.015529370709 13.7176498784178 84.8868557795157 5710456.21279555 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
2141-Jan-16 01:43 00:02 Jupiter 1.79675253970648 1.796752381614 1.79675269779917 1.75087203587148 1.45695426927966 2503059.571595882 1.62647842159362 408.78341612665 10.3953680111665 84.8223708595782 8771984.16766252 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
2187-Oct-10 20:10 00:02 Jupiter 1.88346542937877 1.8834643139398 1.88346654481731 2.13381598079382 1.91147607578609 2520128.340354697 2.22668444324629 52.0100581044934 6.77866352399405 -74.9261002088344 2394794.37298668 T 32 CATAB v2.0f-lin.ifort 2021-Mar-16 22:53:41 2021-Mar-16 22:53
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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