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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184485441435818 4.0058e-08  
a 3.179339565397766 1.9169e-08 au
q 2.802751422538313 1.2784e-07 au
i 13.12350780127053 4.1777e-06 deg
node 106.9205777393773 1.8175e-05 deg
peri 114.9377677638758 2.4938e-05 deg
M 250.2353069807517 1.8747e-05 deg
tp 2459631.840958468126
(2022-Feb-21.34095847)
0.00011038 TDB
period 2070.636183610235
5.67
1.8726e-05
5.127e-08
d
yr
n .1738596103214646 1.5723e-09 deg/d
Q 3.555927708257219 2.1439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2077  
   data-arc span      12349 days (33.81 yr)  
   first obs. used      1987-01-08  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45311  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:30:27  

Additional Information
 Earth MOID = 1.82399 au 
 Jupiter MOID = 1.62524 au 
 T_jup = 3.148 
[ show covariance matrix ]

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

[ show close-approach data ]
Alternate Designations
 1997 YP8 = 1987 AV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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