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 ]

[ hide orbit diagram ]

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 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-22 15:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin