+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   124P/Mrkos Classification: Jupiter-family Comet          SPK-ID: 1000142 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456694.5 (2014-Feb-06.0) TDB Reference: JPL 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5039131785013868 6.1668e-08   a 3.31665631757286 4.8647e-08 au q 1.645349490588015 2.23e-07 au i 31.52843590933995 9.4523e-06 deg node .4149163553092776 6.9038e-06 deg peri 183.7048135271946 1.5449e-05 deg M 349.7845158270027 4.7232e-06 deg tp 2456757.104505241220 (2014-Apr-09.60450524) 3.0116e-05 TDB period 2206.221604886156 6.04 4.854e-05 1.329e-07 d yr n .1631749046436233 3.5901e-09 deg/d Q 4.987963144557705 7.3161e-08 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -1.238253975326766E-11 7.425E-13   Orbit Determination Parameters    # obs. used (total)      2789      data-arc span      10718 days (29.34 yr)      first obs. used      1991-03-15      last obs. used      2020-07-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47163      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 11:21:10   Additional Information  Earth MOID = .649553 au   Jupiter MOID = .00415466 au   T_jup = 2.744  [ 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 16.4   0.6 55 2 parameter fit from 1020 observations, autocmod 2.8 comet total magnitude slope K1 4.5   n/a 55 autocmod 2.8 124P/Mrkos          Discovered 1991-Mar-16 by Mrkos, Antonin at Klet Observatory Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1996.2   124P/1995 S3         1990.1   124P/1991 F1   1991 IV   1991k  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 09:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin