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11254 Konkohekisui (1977 DL2)
Classification: Main-belt Asteroid          SPK-ID: 2011254
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1809469400831653 2.9166e-08  
a 2.458926013604838 6.851e-09 au
q 2.013990875552147 7.1311e-08 au
i 5.598762174257624 2.5311e-06 deg
node 140.7657927910234 4.1107e-05 deg
peri 314.0997930262852 4.2203e-05 deg
M 175.0893847277189 1.0137e-05 deg
tp 2458515.526239863593
(2019-Feb-01.02623986)
3.8956e-05 TDB
period 1408.369525271786
3.86
5.886e-06
1.611e-08
d
yr
n .2556147328809373 1.0683e-09 deg/d
Q 2.903861151657529 8.0907e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2112  
   data-arc span      15858 days (43.42 yr)  
   first obs. used      1977-02-18  
   last obs. used      2020-07-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49122  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:38:33  

Additional Information
 Earth MOID = 1.03517 au 
 Jupiter MOID = 2.27927 au 
 T_jup = 3.462 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457138.5 (2015-Apr-26.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181389146872864 2.9119e-08  
q 2.01247016792141 7.1102e-08 au
tp 2457109.409484523703
(2015-Mar-27.90948452)
3.8213e-05 TDB
node 140.7948493599446 4.1109e-05 deg
peri 314.3929852490386 4.2195e-05 deg
i 5.598720693992028 2.5314e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2112  
   data-arc span      15858 days (43.42 yr)  
   first obs. used      1977-02-18  
   last obs. used      2020-07-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49122  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:38:33  

Additional Information
 Jupiter MOID = 2.27927 au 
 T_jup = 3.462 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.479010911773006E-16 -2.063862809718547E-15 -5.53735335681962E-13 -5.948779842491891E-15 -1.42021420224393E-13 -6.957446743529372E-16
q -2.063862809718547E-15 5.055431967560987E-15 1.363712645474548E-12 1.532718481762749E-14 3.484698314674005E-13 1.737795388446468E-15
tp -5.53735335681962E-13 1.363712645474548E-12 1.460201862818931E-9 6.635058728659234E-12 3.850511053907361E-10 9.697138950999985E-13
node -5.948779842491891E-15 1.532718481762749E-14 6.635058728659234E-12 1.689921543707422E-9 -1.680209768131604E-9 8.475100380185436E-12
peri -1.42021420224393E-13 3.484698314674005E-13 3.850511053907361E-10 -1.680209768131604E-9 1.780426331698628E-9 -8.185804739544871E-12
i -6.957446743529372E-16 1.737795388446468E-15 9.697138950999985E-13 8.475100380185436E-12 -8.185804739544871E-12 6.407967784648879E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.26   n/a E2021B10  
rotation period rot_per 8.79414 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.]

11254 Konkohekisui           Discovered 1977 Feb. 18 by H. Kosai and K. Hurukawa at the Kiso Station of the Tokyo Astronomical Observatory.
Konko Hekisui (1909-1989) was a Japanese poet and sometime director of the library in Konko, Okayama prefecture.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1977 DL2 = 1997 LR17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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