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21392 Helibrochier (1998 FH32)
Classification: Main-belt Asteroid          SPK-ID: 2021392
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1065142044516863 3.3374e-08  
a 2.280710201980136 6.2592e-09 au
q 2.037782169231377 7.8083e-08 au
i 6.330516929106468 3.8885e-06 deg
node 197.7893563361707 2.6042e-05 deg
peri 201.6706317992875 3.1063e-05 deg
M 42.08366591036491 1.6435e-05 deg
tp 2459249.433198179757
(2021-Feb-03.93319818)
5.7373e-05 TDB
period 1258.06646141651
3.44
5.179e-06
1.418e-08
d
yr
n .2861534036879584 1.178e-09 deg/d
Q 2.523638234728895 6.9259e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1701  
   data-arc span      12510 days (34.25 yr)  
   first obs. used      1986-12-05  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50534  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:59:52  

Additional Information
 Earth MOID = 1.04568 au 
 Jupiter MOID = 2.84853 au 
 T_jup = 3.590 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457268.5 (2015-Sep-03.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075385513870581 3.3446e-08  
q 2.035282793358958 7.836e-08 au
tp 2456733.104490071752
(2014-Mar-16.60449007)
5.6337e-05 TDB
node 197.8729129768202 2.6026e-05 deg
peri 201.5204219793392 3.0921e-05 deg
i 6.332689025332869 3.8895e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1701  
   data-arc span      12510 days (34.25 yr)  
   first obs. used      1986-12-05  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50534  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:59:52  

Additional Information
 Jupiter MOID = 2.84853 au 
 T_jup = 3.590 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.118643461542445E-15 -2.614781609456723E-15 -5.828419725137273E-13 4.153048043182846E-16 -1.662636161991352E-13 -2.628446528139724E-15
q -2.614781609456723E-15 6.140239891685387E-15 1.301388068980817E-12 -1.464362468049957E-15 3.739581227279545E-13 6.226337210756136E-15
tp -5.828419725137273E-13 1.301388068980817E-12 3.17389500193148E-9 8.580310440473682E-12 9.461035999651875E-10 1.853285295055661E-12
node 4.153048043182846E-16 -1.464362468049957E-15 8.580310440473682E-12 6.773433695916064E-10 -6.701601835732834E-10 -2.187766518915631E-11
peri -1.662636161991352E-13 3.739581227279545E-13 9.461035999651875E-10 -6.701601835732834E-10 9.561305391835986E-10 2.230704387640644E-11
i -2.628446528139724E-15 6.226337210756136E-15 1.853285295055661E-12 -2.187766518915631E-11 2.230704387640644E-11 1.51284665856867E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.09   n/a MPCxxxxx  
rotation period rot_per 13.736 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

21392 Helibrochier           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Helio Brochier (b. 1954), a 2003 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the Fundacao Escola Tecnica Liberato Salzano Viera Da Cunha, Montenegro, Rio Grande Do Sul, Brasil.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 1998 FH32 = 1986 XZ4 = 2000 WL143 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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