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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 ]

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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.


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 
[ show covariance matrix ]

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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