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JPL Small-Body Database Browser
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11457 Hitomikobayashi (1981 EF12)
Classification: Main-belt Asteroid          SPK-ID: 2011457
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278296305846454 5.0807e-08  
a 2.28664914227166 9.4165e-09 au
q 1.994347627138378 1.1888e-07 au
i 5.098799539004649 3.6594e-06 deg
node 267.2487709448429 6.2394e-05 deg
peri 328.2113590758901 6.6771e-05 deg
M 322.4919674229117 2.6093e-05 deg
tp 2458732.088976692840
(2019-Sep-05.58897669)
9.181e-05 TDB
period 1262.983642558731
3.46
7.8015e-06
2.136e-08
d
yr
n .285039321072014 1.7607e-09 deg/d
Q 2.578950657404942 1.062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      13960 days (38.22 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54887  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:12:16  

Additional Information
 Earth MOID = .984463 au 
 Jupiter MOID = 2.43302 au 
 T_jup = 3.585 
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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 15.9   n/a MPO431632  
rotation period rot_per 9.18 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]

11457 Hitomikobayashi           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
Hitomi Kobayashi (b. 1984) is a Japanese researcher who studies formation and evolution of cometary organic volatiles based on observations and laboratory experiments.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19

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