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JPL Small-Body Database Browser
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21475 Jasonclain (1998 HQ100)
Classification: Main-belt Asteroid          SPK-ID: 2021475
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04188935105136362 2.4839e-08  
a 2.182341700383706 5.8712e-09 au
q 2.090924822782303 5.4267e-08 au
i 2.599771609988336 2.7896e-06 deg
node 85.5008086946456 8.5615e-05 deg
peri 173.5556135040875 0.00010029 deg
M 270.3026245620737 5.3098e-05 deg
tp 2459293.899783280421
0.0001738 TDB
period 1177.558668414404
n .3057172518501724 1.2337e-09 deg/d
Q 2.273758577985109 6.1172e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2071  
   data-arc span      24876 days (68.11 yr)  
   first obs. used      1951-12-27  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50719  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:25:03  

Additional Information
 Earth MOID = 1.07553 au 
 Jupiter MOID = 2.72489 au 
 T_jup = 3.677 
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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 14.6   n/a MPO452473  
diameter diameter 4.086 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.27240 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.127   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

21475 Jasonclain           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Jason Bernard Clain (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his medicine and health project. He attends the Greenwich High School, Greenwich, Connecticut, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

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Alternate Designations
 1998 HQ100 = 3164 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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