+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0686755659473125 2.9737e-08   a 2.776943057661553 1.1573e-08 au q 2.586234921573185 8.3646e-08 au i 3.362644220148818 3.2484e-06 deg node 241.8226099793059 5.9656e-05 deg peri 76.23994601703617 6.6419e-05 deg M 50.90173431472529 2.7359e-05 deg tp 2458961.510419142169 (2020-Apr-22.01041914) 0.00012863 TDB period 1690.241997980994 4.63 1.0566e-05 2.893e-08 d yr n .2129872529673399 1.3315e-09 deg/d Q 2.96765119374992 1.2368e-08 au   Orbit Determination Parameters    # obs. used (total)      1473      data-arc span      25745 days (70.49 yr)      first obs. used      1950-06-21      last obs. used      2020-12-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50635      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:38:52   Additional Information  Earth MOID = 1.57347 au   Jupiter MOID = 2.22171 au   T_jup = 3.329  [ hide covariance matrix ] Orbital Elements at Epoch 2457516.5 (2016-May-08.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07002401463192952 2.9682e-08   q 2.583484461410746 8.3811e-08 au tp 2457277.550457992508 (2015-Sep-12.05045799) 0.00012819 TDB node 241.8639626932929 5.9607e-05 deg peri 77.79693561386803 6.615e-05 deg i 3.363287934458862 3.251e-06 deg   Orbit Determination Parameters    # obs. used (total)      1473      data-arc span      25745 days (70.49 yr)      first obs. used      1950-06-21      last obs. used      2020-12-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50635      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:38:52   Additional Information  Jupiter MOID = 2.22171 au   T_jup = 3.329  Orbit Covariance (6×6)   e q tp node peri i e 8.810340952409983E-16 -2.466893901460916E-15 6.196562900756269E-13 -1.279293324277203E-15 1.301702954352253E-13 -9.042029691295885E-16 q -2.466893901460916E-15 7.024271853257079E-15 -2.037744660776506E-12 3.585051630506143E-15 -4.281049422423225E-13 2.624417375707977E-15 tp 6.196562900756269E-13 -2.037744660776506E-12 1.643210625827351E-8 -2.000767701823049E-11 3.691547233131594E-9 -2.200761142505732E-12 node -1.279293324277203E-15 3.585051630506143E-15 -2.000767701823049E-11 3.552940955064925E-9 -3.551180215974619E-9 -3.26944625850402E-11 peri 1.301702954352253E-13 -4.281049422423225E-13 3.691547233131594E-9 -3.551180215974619E-9 4.37577988380092E-9 3.215563749286884E-11 i -9.042029691295885E-16 2.624417375707977E-15 -2.200761142505732E-12 -3.26944625850402E-11 3.215563749286884E-11 1.05692769581638E-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 14.58   n/a E2021B10   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.arc Last Updated: 2003-10-02 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1968-Nov-21 07:34 00:02 Iris 0.0217260350905141 0.0217222924384208 0.021729778334085 3.46958726307882 3.46958718681567 2440181.815172043 2.08392915412078 266.04060115854 62.7389253768192 -47.2003831096376 38877.2639423177 T 27 CATAB v2.0f-lin.ifort 2021-Feb-24 02:38:55 2021-Feb-24 02:38 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 01:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin