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11670 Fountain (1998 AU9)
Classification: Main-belt Asteroid          SPK-ID: 2011670
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271402818636118 3.3644e-08  
a 3.096487206866923 1.5238e-08 au
q 2.702798950598794 1.0948e-07 au
i .8750738693085092 4.6053e-06 deg
node 22.40615860343964 0.00021613 deg
peri 247.2479014892676 0.00021691 deg
M 8.074059552233489 1.756e-05 deg
tp 2459155.863327761950
(2020-Nov-02.36332776)
9.7133e-05 TDB
period 1990.22584633436
5.45
1.4691e-05
4.022e-08
d
yr
n .18088399397639 1.3352e-09 deg/d
Q 3.490175463135051 1.7175e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2099  
   data-arc span      14428 days (39.50 yr)  
   first obs. used      1981-03-08  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49469  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:58:01  

Additional Information
 Earth MOID = 1.68504 au 
 Jupiter MOID = 1.6012 au 
 T_jup = 3.211 
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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 13.15   n/a E2021B10  
diameter diameter 12.735 km 0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11670 Fountain           Discovered 1998 Jan. 6 by M. W. Buie at the Anderson Mesa station of the Lowell Observatory.
Glen Harold Fountain (b. 1942) is the project manager of the New Horizons Pluto Kuiper Belt mission. He has additionally played key roles in other space astronomy missions, including the Small Astronomy Satellite series, ASTRO-Spacelab and FUSE.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

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Alternate Designations
 1998 AU9 = 1981 EQ1 = 1992 EA17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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