+ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0621917001840015 2.9145e-08   a 2.664628347877832 1.0042e-08 au q 2.498910580564823 7.8392e-08 au i 2.675219810393266 4.0786e-06 deg node 301.5045573441161 7.8212e-05 deg peri 115.7848129923712 8.7444e-05 deg M 72.19823316938701 3.7996e-05 deg tp 2458681.876751178816 (2019-Jul-17.37675118) 0.0001676 TDB period 1588.742058361927 4.35 8.9811e-06 2.459e-08 d yr n .2265943663448919 1.2809e-09 deg/d Q 2.830346115190842 1.0667e-08 au   Orbit Determination Parameters    # obs. used (total)      2466      data-arc span      15471 days (42.36 yr)      first obs. used      1978-07-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48217      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 19:54:12   Additional Information  Earth MOID = 1.51225 au   Jupiter MOID = 2.37137 au   T_jup = 3.380  [ hide covariance matrix ] Orbital Elements at Epoch 2456535.5 (2013-Aug-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06033340184659858 2.9054e-08   q 2.504353529367486 7.7972e-08 au tp 2457089.060067999823 (2015-Mar-07.56006800) 0.00017387 TDB node 301.6862890044608 7.804e-05 deg peri 114.7398660257568 8.7937e-05 deg i 2.678076164994617 4.0829e-06 deg   Orbit Determination Parameters    # obs. used (total)      2466      data-arc span      15471 days (42.36 yr)      first obs. used      1978-07-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48217      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 19:54:12   Additional Information  Jupiter MOID = 2.37137 au   T_jup = 3.380  Orbit Covariance (6×6)   e q tp node peri i e 8.441552387906644E-16 -2.248870348493177E-15 -6.053081340510259E-13 -4.467158300496283E-16 -1.483184789242401E-13 -2.092029271692213E-16 q -2.248870348493177E-15 6.079631795195901E-15 1.603924679423627E-12 -1.578264768417059E-16 3.864955745248401E-13 6.735383271752777E-16 tp -6.053081340510259E-13 1.603924679423627E-12 3.022946056709073E-8 -1.438919786240501E-11 7.060207149750511E-9 1.198408591473374E-12 node -4.467158300496283E-16 -1.578264768417059E-16 -1.438919786240501E-11 6.090208820351838E-9 -6.086404627741994E-9 8.284510062056268E-11 peri -1.483184789242401E-13 3.864955745248401E-13 7.060207149750511E-9 -6.086404627741994E-9 7.732846362861488E-9 -8.248060992020285E-11 i -2.092029271692213E-16 6.735383271752777E-16 1.198408591473374E-12 8.284510062056268E-11 -8.248060992020285E-11 1.667040579302033E-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 ] 2021-Jan-23 22:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin