+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   C/2020 H3 (Wierzchos) Classification: Hyperbolic Comet          SPK-ID: 1003678 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2459011.5 (2020-Jun-11.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.002218815626618 4.1482e-05   a -1038.566849506374 19.41 au q 2.304388354972246 1.4438e-05 au i 62.36838376631006 0.00038059 deg node 270.5693478869658 0.00029659 deg peri 29.6076089263114 0.00054711 deg M .000218900699190957 6.1575e-06 deg tp 2459004.066475812255 (2020-Jun-03.56647581) 0.0014019 TDB period n/a n/a n/a n/a d yr n 2.944776846920595E-5 8.2554e-07 deg/d Q n/a n/a au   Orbit Determination Parameters    # obs. used (total)      131      data-arc span      123 days      first obs. used      2020-04-25      last obs. used      2020-08-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      norm. resid. RMS      .54783      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:34:05   Additional Information  Earth MOID = 1.37202 au   Jupiter MOID = 2.72511 au   T_jup = 0.946  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 7.4   0.6 18 from 83 observations, assumed slope, autocmod 2.9c comet total magnitude slope K1 27.5   n/a 18 autocmod 2.9c comet nuclear magnitude M2 17.0   0.4 18 from 3 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 18 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 18 autocmod 2.9c [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2021-Apr-22 12:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin