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12291 Gohnaumann (1991 LJ2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2012291
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07168337713231018 3.4604e-08  
a 3.22827384933779 2.0164e-08 au
q 2.996860277509334 1.1846e-07 au
i 7.147219920897115 3.9199e-06 deg
node 90.00055126115781 2.9388e-05 deg
peri 217.1684019234642 4.1746e-05 deg
M 306.4697023700037 2.8794e-05 deg
tp 2459315.529436499351
(2021-Apr-11.02943650)
0.0001692 TDB
period 2118.62444561144
5.80
1.9849e-05
5.434e-08
d
yr
n .1699215737577799 1.592e-09 deg/d
Q 3.459687421166245 2.1609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1950  
   data-arc span      13308 days (36.44 yr)  
   first obs. used      1984-02-26  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46253  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:32:37  

Additional Information
 Earth MOID = 1.98561 au 
 Jupiter MOID = 1.72183 au 
 T_jup = 3.171 
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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 12.7   n/a MPO347622  
diameter diameter 13.338 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.22070 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.099   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12291 Gohnaumann           Discovered 1991 June 6 by E. W. Elst at the European Southern Observatory.
Gottfried O. H. Naumann (b. 1935) is the director of the Universitäts-Augenklinik in Erlangen-Nürnberg and president of the International Council of Ophthalmology. He is considered one of the foremost ophthalmologists in the world and has received many honors.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040306/MPCPages.arcLast Updated: 2004-03-08

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Alternate Designations
 1991 LJ2 = 1984 DQ2 = 1998 QV106 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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