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15023 Ketover (1998 SP156)
Classification: Main-belt Asteroid          SPK-ID: 2015023
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1490442103158504 2.7583e-08  
a 2.334052723055926 6.7706e-09 au
q 1.986175678112495 6.307e-08 au
i 1.838732608041505 3.8267e-06 deg
node 269.7760094221326 0.00014017 deg
peri 148.0031147215709 0.00014149 deg
M 50.0003108116474 1.867e-05 deg
tp 2459019.601642753241
(2020-Jun-19.10164275)
6.7324e-05 TDB
period 1302.460075781425
3.57
5.6672e-06
1.552e-08
d
yr
n .2764000269136957 1.2027e-09 deg/d
Q 2.681929767999357 7.7797e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1144  
   data-arc span      12238 days (33.51 yr)  
   first obs. used      1987-09-18  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49185  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:56:16  

Additional Information
 Earth MOID = .997889 au 
 Jupiter MOID = 2.63552 au 
 T_jup = 3.553 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457155.5 (2015-May-13.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491611168440273 2.7549e-08  
q 1.985580861895877 6.2983e-08 au
tp 2457714.552822049649
(2016-Nov-22.05282205)
6.5795e-05 TDB
node 269.8816081275486 0.00014047 deg
peri 147.3087758548812 0.00014178 deg
i 1.835800505640391 3.8236e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1144  
   data-arc span      12238 days (33.51 yr)  
   first obs. used      1987-09-18  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49185  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:56:16  

Additional Information
 Jupiter MOID = 2.63552 au 
 T_jup = 3.553 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.589340438119605E-16 -1.728281102263698E-15 1.109567169211498E-13 -6.703741476149268E-15 3.309610544238451E-14 -1.829980294122107E-16
q -1.728281102263698E-15 3.966887176338645E-15 -1.693448689315419E-13 1.456435629754121E-14 -5.536918258819498E-14 4.409112682266085E-16
tp 1.109567169211498E-13 -1.693448689315419E-13 4.328936548667608E-9 -1.582050786005354E-11 1.285467070522772E-9 4.809809071171781E-13
node -6.703741476149268E-15 1.456435629754121E-14 -1.582050786005354E-11 1.973194395941506E-8 -1.972632018550361E-8 2.262682844983576E-10
peri 3.309610544238451E-14 -5.536918258819498E-14 1.285467070522772E-9 -1.972632018550361E-8 2.010150081858623E-8 -2.260212193528083E-10
i -1.829980294122107E-16 4.409112682266085E-16 4.809809071171781E-13 2.262682844983576E-10 -2.260212193528083E-10 1.461961788929582E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.63   n/a MPCxxxxx  
diameter diameter 2.395 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.194   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15023 Ketover           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Daniel Jacob Ketover (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his physics project. He attends the Syosset High School, Syosset, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030216/MPCPages.arcLast Updated: 2011-11-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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