+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7721 Andrillat (6612 P-L) Classification: Main-belt Asteroid          SPK-ID: 2007721 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1380013063508286 2.8598e-08   a 2.606483481198582 9.0828e-09 au q 2.246785355811322 7.3351e-08 au i 4.001060155029835 3.7458e-06 deg node 171.9164759952744 4.989e-05 deg peri 148.2404709369948 5.1999e-05 deg M 96.01978356555563 1.4862e-05 deg tp 2458590.542237486518 (2019-Apr-17.04223749) 6.3116e-05 TDB period 1537.024861174499 4.21 8.0341e-06 2.2e-08 d yr n .2342187228675731 1.2243e-09 deg/d Q 2.966181606585841 1.0336e-08 au   Orbit Determination Parameters    # obs. used (total)      1595      data-arc span      23626 days (64.68 yr)      first obs. used      1955-05-22      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55127      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 18:36:38   Additional Information  Earth MOID = 1.23524 au   Jupiter MOID = 2.33307 au   T_jup = 3.395  [ hide covariance matrix ] Orbital Elements at Epoch 2456911.5 (2014-Sep-11.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1396643607406741 2.8659e-08   q 2.241994177062629 7.3681e-08 au tp 2457054.748077153258 (2015-Feb-01.24807715) 6.1661e-05 TDB node 171.9699178684453 4.984e-05 deg peri 148.4119801324414 5.1898e-05 deg i 4.003037682925697 3.7491e-06 deg   Orbit Determination Parameters    # obs. used (total)      1595      data-arc span      23626 days (64.68 yr)      first obs. used      1955-05-22      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55127      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 18:36:38   Additional Information  Jupiter MOID = 2.33307 au   T_jup = 3.395  Orbit Covariance (6×6)   e q tp node peri i e 8.213355017178699E-16 -2.100129024429855E-15 4.180373473836805E-13 7.229102063344938E-15 8.4390077475649E-14 2.17461902091197E-16 q -2.100129024429855E-15 5.428916125948531E-15 -1.091255032055389E-12 -1.892241601344575E-14 -2.220059986480295E-13 -4.337509903109217E-16 tp 4.180373473836805E-13 -1.091255032055389E-12 3.802094064685249E-9 1.709142761592499E-11 9.050799346922862E-10 1.376675795682196E-12 node 7.229102063344938E-15 -1.892241601344575E-14 1.709142761592499E-11 2.484040106440727E-9 -2.473589181483762E-9 5.064574396976723E-11 peri 8.4390077475649E-14 -2.220059986480295E-13 9.050799346922862E-10 -2.473589181483762E-9 2.693391780991639E-9 -5.021200997697282E-11 i 2.17461902091197E-16 -4.337509903109217E-16 1.376675795682196E-12 5.064574396976723E-11 -5.021200997697282E-11 1.405600723651283E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5   n/a MPO502226   7721 Andrillat           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Named in honor of Yvette Marie Josette (b. 1925), French spectroscopist who works mainly on infrared spectra of early-type stars. She has also contributed to the spectroscopy of galaxies, novae, planetary nebulae and comets. Near the end of her renowned career she became acting director of the Observatoire de Haute Provence. The planet is named also in honor of her husband, Henri Andrillat, who is a retired professor of astronomy and a prominent cosmologist. The couple now live in Toulouse. Name suggested and citation prepared by H. Haupt. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19980211/MPCPages.arc Last Updated: 2009-11-17 Alternate Designations  6612 P-L = 1990 WF6 = 1990 WH7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-11 08:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin