+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   110P/Hartley 3 Classification: Jupiter-family Comet          SPK-ID: 1000119 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2015-Apr-30.0] K212/9 (default) [epoch=2011-Sep-08.0] K142/2 [epoch=2006-Feb-23.0] K084/1 [epoch=2001-Apr-01.0] SAO/2001 [epoch=1994-May-08.0] SAO/1994 [epoch=1987-Jul-24.0] SAO/1987 Orbital Elements at Epoch 2457142.5 (2015-Apr-30.0) TDB Reference: JPL K212/9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3149589356127522 2.5014e-07   a 3.613363348226702 3.2834e-07 au q 2.475302274087089 1.0284e-06 au i 11.69076166832122 1.7572e-05 deg node 287.7120623085165 3.0406e-05 deg peri 167.7467760812752 8.1206e-05 deg M 19.11570926837812 3.9583e-05 deg tp 2457009.284795645079 (2014-Dec-17.78479565) 0.00026571 TDB period 2508.799066488446 6.87 0.00034196 9.362e-07 d yr n .1434949513529157 1.9559e-08 deg/d Q 4.751424422366314 4.3176e-07 au   Orbit Determination Parameters    # obs. used (total)      1388      data-arc span      2704 days (7.40 yr)      first obs. used      2013-08-11      last obs. used      2021-01-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48245      source      ORB      producer      Davide Farnocchia      solution date      2021-Feb-01 11:37:09   Additional Information  Earth MOID = 1.49394 au   Jupiter MOID = .474927 au   T_jup = 2.989  [ 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 comet total magnitude M1 6.7   1. K212/9 from 279 observations, assumed slope, autocmod 2.9a comet total magnitude slope K1 20.25   n/a K212/9 autocmod 2.9a comet nuclear magnitude M2 13.3   0.9 K212/9 from 1101 observations, autocmod 2.9a comet nuclear magnitude slope K2 5.   n/a K212/9 autocmod 2.9a comet nuclear phase coefficient PC 0.03   n/a K212/9 autocmod 2.9a diameter diameter 4.3 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264   rotation period rot_per 10.153 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Kokotankekova, R.; Snodgrass, C.; Lacerda, P.; Green S.F.; et al. (2017) Mon. Not. Royal Ast. Soc. 471, 2974-3007.] 110P/Hartley 3          Discovered 1988-Feb-19 by Hartley, Malcolm at U. K. Schmidt Telescope, Siding Spring discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1994.4   110P/1993 M1   1994 XII   1993m   1987.5   110P/1988 D1   1987 XII   1988d  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 08:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin