+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15273 Ruhmkorff (1991 GQ3) Classification: Main-belt Asteroid          SPK-ID: 2015273 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .148525296357446 3.1682e-08   a 2.599074090211071 1.0856e-08 au q 2.213045840707512 8.1454e-08 au i 12.10658842870538 5.1528e-06 deg node 199.8310830428643 1.397e-05 deg peri 236.8643122739473 2.4001e-05 deg M 90.08178761364107 1.7401e-05 deg tp 2458617.533388861079 (2019-May-14.03338886) 7.4067e-05 TDB period 1530.475622900876 4.19 9.5886e-06 2.625e-08 d yr n .2352209957566349 1.4737e-09 deg/d Q 2.985102339714629 1.2468e-08 au   Orbit Determination Parameters    # obs. used (total)      2116      data-arc span      10662 days (29.19 yr)      first obs. used      1991-04-08      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48085      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:48:56   Additional Information  Earth MOID = 1.25201 au   Jupiter MOID = 2.40397 au   T_jup = 3.369  [ show covariance matrix ] [ 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 13.6   n/a MPO384887   15273 Ruhmkorff           Discovered 1991 Apr. 8 by E. W. Elst at the European Southern Observatory. Heinrich D. Ruhmkorff (1803-1877) was a German researcher who invented the Ruhmkorff coil, used in many physical experiments where high voltages are needed. The coil was applied for energizing discharge tubes, notably for generating x-rays. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060413/MPCPages.arc Last Updated: 2006-04-17 [ show close-approach data ] Alternate Designations  1991 GQ3 = 1993 TT1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-28 01:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin