+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1485515536115249 1.6634e-08   a 2.598678707351408 1.0502e-08 au q 2.212640948037167 4.1983e-08 au i 12.1075858275389 5.5218e-07 deg node 199.8308951608597 1.4235e-06 deg peri 236.8003882068884 9.254e-06 deg M 137.2033877299213 7.7689e-06 deg tp 2458617.337427784853 (2019-May-13.83742778) 3.1829e-05 TDB period 1530.126401912958 4.19 9.2757e-06 2.54e-08 d yr n .2352746802812692 1.4262e-09 deg/d Q 2.984716466665649 1.2062e-08 au   Orbit Determination Parameters    # obs. used (total)      2172      data-arc span      10908 days (29.86 yr)      first obs. used      1991-04-08      last obs. used      2021-02-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48441      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:53:41   Additional Information  Earth MOID = 1.25101 au   Jupiter MOID = 2.40484 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 13.66   n/a E2021B10   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 ] 2021-Apr-16 09:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin