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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1181425029192776 2.3525e-08  
a 3.178876827480442 1.5647e-08 au
q 2.80331636260981 7.622e-08 au
i 13.12250342215628 4.6462e-07 deg
node 106.9176644631763 2.3551e-06 deg
peri 114.9771972941304 8.1196e-06 deg
M 319.0203037818015 5.7286e-06 deg
tp 2459632.154214713684
(2022-Feb-21.65421471)
3.3291e-05 TDB
period 2070.184143025738
5.67
1.5285e-05
4.185e-08
d
yr
n .1738975739007601 1.284e-09 deg/d
Q 3.554437292351074 1.7496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2543  
   data-arc span      12600 days (34.50 yr)  
   first obs. used      1987-01-08  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43541  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:05:19  

Additional Information
 Earth MOID = 1.82492 au 
 Jupiter MOID = 1.62427 au 
 T_jup = 3.149 
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Orbital Elements at Epoch 2457221.5 (2015-Jul-18.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1204597395564154 2.3335e-08  
q 2.797410518777903 7.5722e-08 au
tp 2457559.487216468768
(2016-Jun-19.98721647)
3.2783e-05 TDB
node 107.0013241795981 2.3528e-06 deg
peri 114.4145833700427 8.0454e-06 deg
i 13.12888863636963 4.6509e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2543  
   data-arc span      12600 days (34.50 yr)  
   first obs. used      1987-01-08  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43541  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:05:19  

Additional Information
 Jupiter MOID = 1.62427 au 
 T_jup = 3.149 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.445437052909904E-16 -1.737964790096013E-15 4.746587403534695E-13 3.14528560567696E-15 1.334411160320162E-13 1.757118128048564E-15
q -1.737964790096013E-15 5.733808922080648E-15 -1.611262064248075E-12 -1.026417664229789E-14 -4.499151031615533E-13 -5.645773350262426E-15
tp 4.746587403534695E-13 -1.611262064248075E-12 1.074753593365505E-9 2.010177615018514E-14 2.472090679952452E-10 3.213687627287395E-12
node 3.14528560567696E-15 -1.026417664229789E-14 2.010177615018514E-14 5.535564499341614E-12 -5.293389794381209E-12 6.51747585168195E-13
peri 1.334411160320162E-13 -4.499151031615533E-13 2.472090679952452E-10 -5.293389794381209E-12 6.472883392196298E-11 5.498141311055082E-14
i 1.757118128048564E-15 -5.645773350262426E-15 3.213687627287395E-12 6.51747585168195E-13 5.498141311055082E-14 2.163050809809904E-13

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 12.44   n/a MPCxxxxx  
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 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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