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21461 Alexchernyak (1998 HS60)
Classification: Main-belt Asteroid          SPK-ID: 2021461
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05970427596854754 1.9144e-08  
a 2.206990752825103 5.1481e-09 au
q 2.075223967858401 4.3106e-08 au
i 2.168073955209952 6.0091e-07 deg
node 330.6528236719572 1.2753e-05 deg
peri 120.9131117497449 2.1169e-05 deg
M 136.8524837693271 1.7382e-05 deg
tp 2458941.250601893000
(2020-Apr-01.75060189)
5.7441e-05 TDB
period 1197.565282006615
3.28
4.1902e-06
1.147e-08
d
yr
n .3006099169782139 1.0518e-09 deg/d
Q 2.338757537791806 5.4554e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2288  
   data-arc span      13787 days (37.75 yr)  
   first obs. used      1983-11-07  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:42:41  

Additional Information
 Earth MOID = 1.09291 au 
 Jupiter MOID = 2.74129 au 
 T_jup = 3.657 
[ 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 14.30   n/a MPO636386  

21461 Alexchernyak           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Alexander Chernyak (b. 1988) was awarded first place in the 2006 Intel International Science and Engineering Fair for his physics team project. He attends the International Academy, Bloomfield Hills, Michigan, 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

Alternate Designations
 1998 HS60 = 1983 VO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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