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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2551700978722997 7.5932e-08  
a 3.125530513961011 4.5971e-08 AU
q 2.32798858681072 2.3766e-07 AU
i 13.40520503299191 9.4056e-06 deg
node 45.15154458153697 3.1311e-05 deg
peri 210.673506940962 3.5955e-05 deg
M 114.376294192158 2.2015e-05 deg
tp 2456359.264493465069
(2013-Mar-07.76449346)
0.00011582 JED
period 2018.292199297384
5.53
4.4528e-05
1.219e-07
d
yr
n .1783686228016561 3.9352e-09 deg/d
Q 3.923072441111301 5.7701e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      624  
   data-arc span      6771 days (18.54 yr)  
   first obs. used      1996-04-18  
   last obs. used      2014-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54171  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 15:03:40  

Additional Information
 Earth MOID = 1.32627 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 13.3 mag n/a MPO313911  

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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