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15939 Fessenden (1997 YP8)
Classification: Main-belt Asteroid          SPK-ID: 2015939
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .118448546677035 4.0342e-08  
a 3.179339566728421 1.9341e-08 au
q 2.802751415656646 1.2849e-07 au
i 13.12350789707896 4.1824e-06 deg
node 106.9205766135841 1.8338e-05 deg
peri 114.9377691515101 2.5064e-05 deg
M 250.2353063478852 1.8785e-05 deg
tp 2459631.840962504581
(2022-Feb-21.34096250)
0.00011064 TDB
period 2070.636184910176
5.67
1.8895e-05
5.173e-08
d
yr
n .1738596102123158 1.5865e-09 deg/d
Q 3.555927717800197 2.1632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2005  
   data-arc span      12158 days (33.29 yr)  
   first obs. used      1987-01-08  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45639  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:17:02  

Additional Information
 Earth MOID = 1.82399 au 
 Jupiter MOID = 1.62524 au 
 T_jup = 3.148 
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Orbital Elements at Epoch 2456761.5 (2014-Apr-14.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .122014829602122 4.0046e-08  
q 2.787710818566033 1.2787e-07 au
tp 2457561.861074595742
(2016-Jun-22.36107460)
0.00010055 TDB
node 107.0240396990932 1.8296e-05 deg
peri 115.1787475245123 2.4753e-05 deg
i 13.14595370385133 4.1902e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2005  
   data-arc span      12158 days (33.29 yr)  
   first obs. used      1987-01-08  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45639  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:17:02  

Additional Information
 Jupiter MOID = 1.62524 au 
 T_jup = 3.148 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.603646435359696E-15 -5.076662492369738E-15 -4.573149718668338E-14 1.906754014674167E-15 2.870560620757386E-14 -1.389950953333236E-15
q -5.076662492369738E-15 1.635135755501485E-14 6.782547228128818E-13 -6.138777983440744E-15 -2.129660715869659E-14 4.772809819893225E-15
tp -4.573149718668338E-14 6.782547228128818E-13 1.010985222794699E-8 3.080008296031588E-12 1.696147146199657E-9 2.147134828114694E-12
node 1.906754014674167E-15 -6.138777983440744E-15 3.080008296031588E-12 3.347279710938389E-10 -3.249546518430157E-10 -7.569453182866591E-12
peri 2.870560620757386E-14 -2.129660715869659E-14 1.696147146199657E-9 -3.249546518430157E-10 6.127178516657944E-10 7.646458473609328E-12
i -1.389950953333236E-15 4.772809819893225E-15 2.147134828114694E-12 -7.569453182866591E-12 7.646458473609328E-12 1.755807203922548E-11

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 12.4   n/a MPO452396  
diameter diameter 12.084 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.159   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15939 Fessenden           Discovered 1997 Dec. 28 by Spacewatch at Kitt Peak.
Reginald Aubrey Fessenden (1866-1932) invented amplitude modulation as a means of transmitting sounds by radio. He was a professor at Purdue University and the University of Pittsburgh. The name was suggested by K. Ellis.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

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Alternate Designations
 1997 YP8 = 1987 AV 
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