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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184485478689249 4.0678e-08  
a 3.179339567715476 1.9612e-08 au
q 2.802751412737362 1.2922e-07 au
i 13.12350783559127 4.2063e-06 deg
node 106.9205748976307 1.9049e-05 deg
peri 114.9377693852706 2.5785e-05 deg
M 250.2353073843204 1.8929e-05 deg
tp 2459631.840956837255
(2022-Feb-21.34095684)
0.00011133 TDB
period 2070.636185874449
5.67
1.9159e-05
5.245e-08
d
yr
n .1738596101313513 1.6087e-09 deg/d
Q 3.55592772269359 2.1934e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      12048 days (32.99 yr)  
   first obs. used      1987-01-08  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:58:07  

Additional Information
 Earth MOID = 1.82399 au 
 Jupiter MOID = 1.62524 au 
 T_jup = 3.148 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456633.5 (2013-Dec-07.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1223161127963209 4.0348e-08  
q 2.785821047539248 1.2839e-07 au
tp 2457562.079428976462
(2016-Jun-22.57942898)
0.00010138 TDB
node 107.0245435445153 1.901e-05 deg
peri 115.2831253396982 2.5453e-05 deg
i 13.14582619776561 4.2141e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      12048 days (32.99 yr)  
   first obs. used      1987-01-08  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:58:07  

Additional Information
 Jupiter MOID = 1.62524 au 
 T_jup = 3.148 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.627965872485784E-15 -5.135281769871545E-15 -1.13712534329001E-13 2.920171970855834E-15 1.180420933302934E-14 -1.30782246395211E-15
q -5.135281769871545E-15 1.64845148456323E-14 8.349296930014035E-13 -9.065046217331276E-15 1.934999913168375E-14 4.52704272075456E-15
tp -1.13712534329001E-13 8.349296930014035E-13 1.027691324977099E-8 4.969202955478432E-12 1.737207431068045E-9 2.313076671820742E-12
node 2.920171970855834E-15 -9.065046217331276E-15 4.969202955478432E-12 3.613624436237222E-10 -3.505558286622789E-10 -5.314080701777147E-12
peri 1.180420933302934E-14 1.934999913168375E-14 1.737207431068045E-9 -3.505558286622789E-10 6.478755832398213E-10 5.480684061431482E-12
i -1.30782246395211E-15 4.52704272075456E-15 2.313076671820742E-12 -5.314080701777147E-12 5.480684061431482E-12 1.775855053874409E-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

[ 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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