Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2071913551227157 3.7385e-08  
a 2.638097465325793 8.4031e-09 au
q 2.09150647653914 9.6701e-08 au
i 5.430362057585861 3.685e-06 deg
node 328.6438364447354 3.2437e-05 deg
peri 195.6228960935856 3.3142e-05 deg
M 116.6331681202151 7.6879e-06 deg
tp 2458493.445952634879
(2019-Jan-09.94595263)
3.2475e-05 TDB
period 1565.073297702916
4.28
7.4778e-06
2.047e-08
d
yr
n .2300211757036414 1.099e-09 deg/d
Q 3.184688454112445 1.0144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2367  
   data-arc span      23973 days (65.63 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:47:28  

Additional Information
 Earth MOID = 1.09998 au 
 Jupiter MOID = 1.80485 au 
 T_jup = 3.359 
[ 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 13.3   n/a MPO389703  
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 1.84341965300321 1.84341924077815 1.8434200652286 2.05023455798815 1.81231702663846 2424847.851209629 1.17309239625846 218.41200815012 19.842162480812 83.8529186617028 3195941.47160898 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
1987-Mar-31 15:35 < 00:01 Jupiter 1.85467244654025 1.85467205505342 1.85467283802945 1.76031591355735 1.47828245162922 2446886.149549057 0.399128619383042 138.928239299408 49.9968396314258 84.1624376877257 2480925.66944217 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
2033-Dec-22 15:07 < 00:01 Jupiter 1.80649935949793 1.8064990324123 1.80649968658407 1.89802858481842 1.63240998722314 2463954.130089922 0.271175477947689 270.155802186996 19.8089651351136 81.6224443652994 3708897.406376 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
2080-Sep-14 20:47 < 00:01 Jupiter 1.95780473132864 1.95780407182613 1.95780539083103 2.34132295906341 2.14860777424575 2481022.366202306 0.87472414766089 100.353011484905 13.421784631411 80.0847621005214 2064889.78917315 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
2094-Apr-28 23:30 00:01 Jupiter 1.9178040135651 1.91780347454921 1.91780455258121 1.79582183403233 1.53024528809827 2485996.479058148 1.10600033251478 87.6505865539228 38.1017994618834 89.392594263817 2445699.49749931 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
2141-Jan-16 01:43 00:02 Jupiter 1.79675256690044 1.79675226845908 1.79675286535038 1.75086994936122 1.45695176674506 2503059.571650016 1.67807298340491 497.896287579575 45.2933354729289 83.2247665145636 2951120.70237746 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
2187-Oct-10 20:10 00:02 Jupiter 1.88346537382644 1.88346416124114 1.88346658641098 2.13381428250358 1.91147417301393 2520128.340398425 2.29664699283449 156.487393669011 22.9654320405766 83.596317943688 1339736.09383318 T 30 CATAB v2.0f-lin.ifort 2020-Dec-18 02:47:34 2020-Dec-18 02:47
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-22 10:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin