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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082974891912124 3.7427e-08  
a 2.635973840811513 8.3995e-09 au
q 2.086907108196758 9.681e-08 au
i 5.435132083893496 3.6893e-06 deg
node 328.6302583058963 3.2388e-05 deg
peri 195.5914858442394 3.3082e-05 deg
M 162.6497061516347 7.7306e-06 deg
tp 2458494.246109558408
(2019-Jan-10.74610956)
3.2189e-05 TDB
period 1563.183891165103
4.28
7.4716e-06
2.046e-08
d
yr
n .2302992002634301 1.1008e-09 deg/d
Q 3.185040573426268 1.0149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2371  
   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-Feb-24 02:03:07  

Additional Information
 Earth MOID = 1.09512 au 
 Jupiter MOID = 1.80371 au 
 T_jup = 3.360 
[ show covariance matrix ]

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

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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
1926-Nov-28 08:26 00:01 Jupiter 1.84341965290076 1.84341924068092 1.8434200651209 2.05023461123585 1.81231708686232 2424847.851199033 1.1730812944473 218.410084579808 19.8407132449708 83.8526564376516 3196084.89037439 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
1987-Mar-31 15:35 < 00:01 Jupiter 1.85467244660555 1.85467205514492 1.8546728380685 1.76031589916967 1.47828243450747 2446886.149549035 0.399128554542761 138.916586607471 49.9886427812885 84.1590736842074 2481327.71428064 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
2033-Dec-22 15:07 < 00:01 Jupiter 1.80649936009656 1.80649903301525 1.80649968717849 1.89802853944279 1.63240993455937 2463954.130097604 0.271143946919582 270.152936487136 19.8031785317153 81.622150433982 3709311.90478303 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
2080-Sep-14 20:47 < 00:01 Jupiter 1.95780473178253 1.95780407231808 1.95780539124686 2.34132297634184 2.14860779312062 2481022.366200008 0.874682756583363 100.347966885752 13.4193869901305 80.0839682397916 2064948.17425574 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
2094-Apr-28 23:30 00:01 Jupiter 1.91780401352252 1.91780347459221 1.91780455245295 1.79582184296275 1.53024529857216 2485996.479062852 1.10595682421379 87.6313874980908 38.0956626133023 89.3883418314489 2446222.26013169 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
2141-Jan-16 01:43 00:02 Jupiter 1.79675256712136 1.79675226870186 1.79675286554943 1.75086993209641 1.45695174603712 2503059.571653303 1.67801875087807 497.890321062786 45.2861954926004 83.2246158571844 2951518.69507297 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
2187-Oct-10 20:10 00:02 Jupiter 1.88346536836034 1.88346415581156 1.88346658090838 2.13381428825257 1.91147417874884 2520128.340402682 2.29657836121388 156.485031374498 22.9633068527562 83.5956843323506 1339762.33080368 T 31 CATAB v2.0f-lin.ifort 2021-Feb-24 02:03:12 2021-Feb-24 02:03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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