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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .208297480327866 1.9941e-08  
a 2.635973840517409 8.122e-09 au
q 2.086907131327465 5.167e-08 au
i 5.435140061369991 2.94e-07 deg
node 328.6303431861232 1.1266e-05 deg
peri 195.59140595 1.0237e-05 deg
M 162.6497030317287 5.3087e-06 deg
tp 2458494.246123223793
(2019-Jan-10.74612322)
2.1318e-05 TDB
period 1563.183890903489
4.28
7.2248e-06
1.978e-08
d
yr
n .2302992003019729 1.0644e-09 deg/d
Q 3.185040549707354 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4799  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:02:00  

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

[ 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 1.84341972337692 1.84341934135763 1.84342010539673 2.0502358218286 1.81231846747278 2424847.851075427 1.12651450843646 77.8171381947888 3.20444910637156 -87.7292790509684 5276672.78554573 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
1987-Mar-31 15:35 < 00:01 Jupiter 1.8546723725062 1.85467212990814 1.85467261510468 1.76031727772102 1.47828406542864 2446886.149511447 0.374845518938146 72.2184700767 13.7004063965147 83.1930516076906 9373642.0086953 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
2033-Dec-22 15:07 < 00:01 Jupiter 1.80649936082219 1.8064991714738 1.80649955017088 1.89803003866309 1.63241167942811 2463954.130054896 0.257825709726208 65.0497284989414 6.33432397705387 85.6530216749448 8657513.54536143 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
2080-Sep-14 20:47 < 00:01 Jupiter 1.9578047859381 1.95780420449042 1.95780536738567 2.3413237996059 2.1486086969079 2481022.366245552 0.85104524805692 31.5423252421466 8.95390514433649 66.912684091873 4463528.2814854 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
2094-Apr-28 23:30 00:01 Jupiter 1.91780398083201 1.91780347870807 1.91780448295596 1.79582287565943 1.53024650716953 2485996.479121578 1.06954847245567 51.0166202468029 13.7177635219351 84.8874277616827 5710220.35986809 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
2141-Jan-16 01:44 00:02 Jupiter 1.79675255001116 1.7967523919198 1.79675270810273 1.75087129910851 1.45695338752936 2503059.571924027 1.62687447740625 408.879670098683 10.3954195161012 84.8224531874179 8771986.47635493 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
2187-Oct-10 20:11 00:02 Jupiter 1.88346519985535 1.88346408388763 1.88346631582254 2.13381479145167 1.91147472073046 2520128.340779920 2.22770995388716 52.0298657402339 6.77936301844912 -74.9229326588238 2394552.06561949 T 33 CATAB v2.0f-lin.ifort 2021-Apr-12 23:02:49 2021-Apr-12 23:02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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