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JPL Small-Body Database Browser
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9490 Gosemeijer (1181 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2009490
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09445208685093678 3.8673e-08  
a 2.94370932857932 1.4816e-08 au
q 2.665669839412434 1.1602e-07 au
i 3.575907541534373 4.0199e-06 deg
node 324.9396673362116 5.5369e-05 deg
peri 231.6084314190316 5.9518e-05 deg
M 254.8423778365271 2.4035e-05 deg
tp 2459539.363874643187
(2021-Nov-20.86387464)
0.00012476 TDB
period 1844.763992190488
5.05
1.3927e-05
3.813e-08
d
yr
n .1951469139272027 1.4733e-09 deg/d
Q 3.221748817746207 1.6216e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2274  
   data-arc span      17850 days (48.87 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48046  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:20:18  

Additional Information
 Earth MOID = 1.66612 au 
 Jupiter MOID = 1.75544 au 
 T_jup = 3.262 
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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 13.2   n/a MPO365362  
diameter diameter 7.599 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.193   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9490 Gosemeijer           Discovered 1971 Mar. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Dutch amateur astronomer Henny Gosemeijer (1924-1999) founded the Public Observatory Twente in 1984. He himself made many observations of satellites and meteors, in addition to his activities in popularizing astronomy. He was honored by NASA and awarded the Dutch "van der Bilt" and "Simon Stevin" prizes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1181 T-1 = 1991 EF4 = 2067 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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