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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1182981395178767 2.354e-08  
a 3.179341444074506 1.5824e-08 au
q 2.803231266348412 7.6202e-08 au
i 13.12302009224255 4.6471e-07 deg
node 106.9200913515939 2.3549e-06 deg
peri 114.9433860002211 8.1148e-06 deg
M 284.9844296603796 5.6938e-06 deg
tp 2459631.972477656855
(2022-Feb-21.47247766)
3.3353e-05 TDB
period 2070.638018923763
5.67
1.5459e-05
4.232e-08
d
yr
n .1738594562207034 1.298e-09 deg/d
Q 3.5554516218006 1.7696e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2376  
   data-arc span      12484 days (34.18 yr)  
   first obs. used      1987-01-08  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43911  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:13:00  

Additional Information
 Earth MOID = 1.82323 au 
 Jupiter MOID = 1.6246 au 
 T_jup = 3.148 
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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 12.42   n/a E2021B10  
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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