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20664 Senec (1999 UV4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020664
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06847975489855927 3.2891e-08  
a 3.479734153407247 2.1363e-08 au
q 3.241442811469773 1.1069e-07 au
i 10.29368934567285 3.642e-06 deg
node 163.147360819474 2.0126e-05 deg
peri 148.7348070810809 3.7579e-05 deg
M 187.4385180065354 3.3415e-05 deg
tp 2460532.972383243481
(2024-Aug-10.47238324)
0.00022244 TDB
period 2370.923413738114
6.49
2.1833e-05
5.978e-08
d
yr
n .1518395735239741 1.3983e-09 deg/d
Q 3.718025495344721 2.2826e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2157  
   data-arc span      10446 days (28.60 yr)  
   first obs. used      1992-10-04  
   last obs. used      2021-05-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:24:52  

Additional Information
 Earth MOID = 2.23277 au 
 Jupiter MOID = 1.61071 au 
 T_jup = 3.101 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457298.5 (2015-Oct-03.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06752786410107386 3.2369e-08  
q 3.248186551864921 1.0731e-07 au
tp 2458145.694688202133
(2018-Jan-27.19468820)
0.00022275 TDB
node 163.1857669438411 2.0109e-05 deg
peri 145.7995015741234 3.8082e-05 deg
i 10.29371863372324 3.642e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2157  
   data-arc span      10446 days (28.60 yr)  
   first obs. used      1992-10-04  
   last obs. used      2021-05-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:24:52  

Additional Information
 Jupiter MOID = 1.61071 au 
 T_jup = 3.101 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.047765023514854E-15 -3.416178222389478E-15 2.124018629971485E-12 4.725671127216243E-15 2.666490504748914E-13 7.575797009873835E-16
q -3.416178222389478E-15 1.151453877159976E-14 -6.467324178971577E-12 -1.889487111272875E-14 -8.258426414880065E-13 -4.062221495399794E-15
tp 2.124018629971485E-12 -6.467324178971577E-12 4.961664578697212E-8 -2.305843506775316E-11 7.215967511112393E-9 -1.487853596095211E-11
node 4.725671127216243E-15 -1.889487111272875E-14 -2.305843506775316E-11 4.043724260499559E-10 -4.010501495914924E-10 1.290474495798098E-11
peri 2.666490504748914E-13 -8.258426414880065E-13 7.215967511112393E-9 -4.010501495914924E-10 1.450220193804652E-9 -1.489083070663626E-11
i 7.575797009873835E-16 -4.062221495399794E-15 -1.487853596095211E-11 1.290474495798098E-11 -1.489083070663626E-11 1.326441338009936E-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 12.8   n/a MPO502322  
diameter diameter 15.156 km 0.396 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20664 Senec           Discovered 1999 Oct. 31 by A. Galad and J. Toth at Modra.
The town of Senec is located in the south-west of Slovakia. The historical development of the town is dated from the middle of the 13th century. Senec actively supports amateur astronomy. In 1982 an astronomical observatory was built on the building of Albert Molnár Szenczi Elementary School.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

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