+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4785 Petrov (1984 YH1) Classification: Main-belt Asteroid          SPK-ID: 2004785 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06219170053165201 2.918e-08   a 2.664628347790212 1.0059e-08 au q 2.498910579556292 7.8513e-08 au i 2.675219782586602 4.0791e-06 deg node 301.504556327375 7.834e-05 deg peri 115.7848133312913 8.7566e-05 deg M 72.1982338759486 3.8014e-05 deg tp 2458681.876748076354 (2019-Jul-17.37674808) 0.00016768 TDB period 1588.742058283563 4.35 8.9959e-06 2.463e-08 d yr n .2265943663560685 1.283e-09 deg/d Q 2.830346116024131 1.0684e-08 au   Orbit Determination Parameters    # obs. used (total)      2450      data-arc span      15267 days (41.80 yr)      first obs. used      1978-07-09      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48263      source      ORB      producer      Otto Matic      solution date      2020-May-20 02:12:32   Additional Information  Earth MOID = 1.51225 au   Jupiter MOID = 2.37137 au   T_jup = 3.380  [ hide covariance matrix ] Orbital Elements at Epoch 2456521.5 (2013-Aug-17.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06033539956255203 2.909e-08   q 2.504356918540025 7.8097e-08 au tp 2457089.034948035411 (2015-Mar-07.53494804) 0.00017393 TDB node 301.6863463579021 7.8168e-05 deg peri 114.7340951011045 8.8057e-05 deg i 2.678067446624436 4.0834e-06 deg   Orbit Determination Parameters    # obs. used (total)      2450      data-arc span      15267 days (41.80 yr)      first obs. used      1978-07-09      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48263      source      ORB      producer      Otto Matic      solution date      2020-May-20 02:12:32   Additional Information  Jupiter MOID = 2.37137 au   T_jup = 3.380  Orbit Covariance (6×6)   e q tp node peri i e 8.462549569998787E-16 -2.255262566933619E-15 -6.097175629361351E-13 -4.675645656308321E-16 -1.491004554602508E-13 -2.108497451251733E-16 q -2.255262566933619E-15 6.099069467509453E-15 1.617206854603994E-12 -1.063488910366125E-16 3.88861820440963E-13 6.783129626960187E-16 tp -6.097175629361351E-13 1.617206854603994E-12 3.025137883984579E-8 -1.4834768324773E-11 7.0653401512011E-9 1.200442101798739E-12 node -4.675645656308321E-16 -1.063488910366125E-16 -1.4834768324773E-11 6.110264160487694E-9 -6.106541545264351E-9 8.28445158303932E-11 peri -1.491004554602508E-13 3.88861820440963E-13 7.0653401512011E-9 -6.106541545264351E-9 7.754083408422133E-9 -8.247972730967369E-11 i -2.108497451251733E-16 6.783129626960187E-16 1.200442101798739E-12 8.28445158303932E-11 -8.247972730967369E-11 1.667445891999387E-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 13.5   n/a MPO358676   4785 Petrov (1984 YH1)          Discovered 1984-Dec-17 by Karachkina, L. G. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1984 YH1 = 1978 NC1 = 1979 SE5 = 1981 AN2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-28 09:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin