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JPL Small-Body Database Browser
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11657 Antonhajduk (1997 EN7)
Classification: Main-belt Asteroid          SPK-ID: 2011657
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1915848648322419 3.7932e-08  
a 2.288804996879937 8.4741e-09 au
q 1.850304600925335 8.9863e-08 au
i 2.551464333497729 4.0313e-06 deg
node 182.4011790936683 8.1621e-05 deg
peri 159.8147658322315 8.2169e-05 deg
M 18.91647909216281 9.708e-06 deg
tp 2458934.041670558501
(2020-Mar-25.54167056)
3.4e-05 TDB
period 1264.770176435842
3.46
7.0241e-06
1.923e-08
d
yr
n .2846366926633976 1.5808e-09 deg/d
Q 2.727305392834539 1.0098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      12291 days (33.65 yr)  
   first obs. used      1985-09-15  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52276  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:56:50  

Additional Information
 Earth MOID = .842512 au 
 Jupiter MOID = 2.67474 au 
 T_jup = 3.574 
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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 14.9   n/a MPO473924  

11657 Antonhajduk           Discovered 1997 Mar. 5 by A. Galád and A. Pravda at Modra.
Anton Hajduk (b. 1933) is a professor of astronomy at the Slovak Academy of Sciences. His research centers on the structure of meteor streams and radio studies of meteor head echoes and the secondary ozone layer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1997 EN7 = 1985 RU4 = 1998 HO44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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