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18567 Segenthau (1997 SS4)
Classification: Main-belt Asteroid          SPK-ID: 2018567
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06899574272438892 2.9834e-08  
a 2.777851425638065 1.1728e-08 au
q 2.586191503348164 8.408e-08 au
i 3.362512087497528 3.2632e-06 deg
node 241.8306879209815 5.9897e-05 deg
peri 76.27630401344322 6.6587e-05 deg
M 8.256850722080454 2.7287e-05 deg
tp 2458961.714099456871
(2020-Apr-22.21409946)
0.00012821 TDB
period 1691.071410336486
4.63
1.0709e-05
2.932e-08
d
yr
n .2128827900463221 1.3482e-09 deg/d
Q 2.969511347927966 1.2537e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1457  
   data-arc span      25710 days (70.39 yr)  
   first obs. used      1950-06-21  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50816  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:08:23  

Additional Information
 Earth MOID = 1.57541 au 
 Jupiter MOID = 2.22173 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457480.5 (2016-Apr-02.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07002033680681469 2.9798e-08  
q 2.583524081332941 8.4217e-08 au
tp 2457277.609217522874
(2015-Sep-12.10921752)
0.00012827 TDB
node 241.8650521687957 5.9853e-05 deg
peri 77.81075032111767 6.638e-05 deg
i 3.363232094840241 3.2659e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1457  
   data-arc span      25710 days (70.39 yr)  
   first obs. used      1950-06-21  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50816  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:08:23  

Additional Information
 Jupiter MOID = 2.22173 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.879167113106306E-16 -2.488567380365024E-15 6.081871004954731E-13 -1.531880746117111E-15 1.283347283670395E-13 -9.27212074493386E-16
q -2.488567380365024E-15 7.092578375886846E-15 -2.001216425441924E-12 4.347041051561696E-15 -4.221921817478047E-13 2.692087342105506E-15
tp 6.081871004954731E-13 -2.001216425441924E-12 1.645445452321548E-8 -2.101246993316192E-11 3.696664419062811E-9 -2.243665337884163E-12
node -1.531880746117111E-15 4.347041051561696E-15 -2.101246993316192E-11 3.582357140264662E-9 -3.580767374261046E-9 -3.101903553347313E-11
peri 1.283347283670395E-13 -4.221921817478047E-13 3.696664419062811E-9 -3.580767374261046E-9 4.406292382166999E-9 3.047306936808443E-11
i -9.27212074493386E-16 2.692087342105506E-15 -2.243665337884163E-12 -3.101903553347313E-11 3.047306936808443E-11 1.066628336442751E-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 14.5   n/a MPO395181  
diameter diameter 8.636 km 3.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.038   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

18567 Segenthau           Discovered 1997 Sept. 27 at the Starkenburg Observatory, Heppenheim.
Segenthau, located in the Banat region south of the Maros river, is a small village founded in 1771 by German colonialists. It is also the childhood home of Reiner Michael Stoss, discoverer of this minor planet.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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