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69434 de Gerlache (1996 HC21)
Classification: Main-belt Asteroid          SPK-ID: 2069434
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2556107382373664 6.9505e-08  
a 3.124237915101442 4.3412e-08 au
q 2.325649155193192 2.1424e-07 au
i 13.40840418376093 8.7856e-06 deg
node 45.15571181639518 2.5707e-05 deg
peri 210.5986092674418 3.0621e-05 deg
M 221.5374856338967 2.2875e-05 deg
tp 2458376.290197520712
(2018-Sep-14.79019752)
0.00013959 JED
period 2017.040297051165
5.52
4.2041e-05
1.151e-07
d
yr
n .1784793296030357 3.72e-09 deg/d
Q 3.922826675009692 5.4509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      746  
   data-arc span      7212 days (19.75 yr)  
   first obs. used      1996-04-18  
   last obs. used      2016-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54136  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-26 00:27:34  

Additional Information
 Earth MOID = 1.32219 au 
 Jupiter MOID = 1.19528 au 
 T_jup = 3.123 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a MPO319878  

69434 de Gerlache           Discovered 1996 Apr. 18 by E. W. Elst at the European Southern Observatory.
Adrien de Gerlache (1866-1934), an officer in the Royal Belgian Navy, set sail on 1897 Aug. 16 on a scientific mission from Antwerp to Antarctica. The expedition became trapped in the ice on the Bellinghaus Sea and had to struggle to escape for more than a year before they could return to Antwerp.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080321/MPCPages.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 1996 HC21 = 1999 XO197 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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