+ 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 2458990.5 (2020-May-21.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.002305611305995 8.0887e-05   a -999.4737210874138 35.053 au q 2.304397911383971 2.6841e-05 au i 62.36924795619903 0.0006625 deg node 270.5699271587313 0.00054436 deg peri 29.60847298361917 0.00091559 deg M -.0004232485490571597 2.2259e-05 deg tp 2459004.069019724933 (2020-Jun-03.56901973) 0.0024062 TDB period n/a n/a n/a n/a d yr n 3.119227163325902E-5 1.6409e-06 deg/d Q n/a n/a au   Orbit Determination Parameters    # obs. used (total)      101      data-arc span      85 days      first obs. used      2020-04-25      last obs. used      2020-07-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      norm. resid. RMS      .46273      source      ORB      producer      Otto Matic      solution date      2020-Aug-06 07:15:26   Additional Information  Earth MOID = 1.37186 au   Jupiter MOID = 2.72502 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 13.8   0.6 11 from 62 observations, assumed slope, autocmod 2.8 comet total magnitude slope K1 10.   n/a 11 autocmod 2.8 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2020-Aug-11 11:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin