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12171 Johannink (2382 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2012171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05757008618954908 3.1631e-08  
a 2.739158727676999 1.2538e-08 au
q 2.581465123637779 8.8508e-08 au
i 2.372505174563455 3.9166e-06 deg
node 310.7924208009795 8.6549e-05 deg
peri 273.8550489102264 9.3626e-05 deg
M 298.9843969956158 3.6099e-05 deg
tp 2459281.148440142155
(2021-Mar-07.64844014)
0.00016631 TDB
period 1655.862328262433
4.53
1.1369e-05
3.113e-08
d
yr
n .2174093786998363 1.4927e-09 deg/d
Q 2.89685233171622 1.326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      15585 days (42.67 yr)  
   first obs. used      1977-10-07  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53458  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:54:45  

Additional Information
 Earth MOID = 1.57339 au 
 Jupiter MOID = 2.08624 au 
 T_jup = 3.347 
[ show covariance matrix ]

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 15.0   n/a MPO421746  
diameter diameter 5.640 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12171 Johannink           Discovered 1977 Oct. 16 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Carl F. Johannink (b. 1959) is a Dutch high-school teacher and amateur astronomer. His main interests lie in meteor astronomy. He is a very prolific meteor observer, active within the Dutch Meteor Society. The name was suggested by K. Miskotte.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100330/MPCPages.arcLast Updated: 2010-04-05

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Alternate Designations
 2382 T-3 = 1998 HC45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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