+ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.002220819751751 4.2075e-05   a -1037.630142629547 19.652 au q 2.304389515763943 1.4697e-05 au i 62.36840463987316 0.00038719 deg node 270.5693697333738 0.00030159 deg peri 29.60764335684308 0.00055429 deg M .0002191943533528286 6.2482e-06 deg tp 2459004.066571692632 (2020-Jun-03.56657169) 0.0014203 TDB period n/a n/a n/a n/a d yr n 2.948765284190117E-5 8.3773e-07 deg/d Q n/a n/a au   Orbit Determination Parameters    # obs. used (total)      129      data-arc span      123 days      first obs. used      2020-04-25      last obs. used      2020-08-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      norm. resid. RMS      .55      source      ORB      producer      Otto Matic      solution date      2020-Sep-24 20:18:23   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 16 from 83 observations, assumed slope, autocmod 2.8 comet total magnitude slope K1 27.5   n/a 16 autocmod 2.8 comet nuclear magnitude M2 17.0   0.4 16 from 3 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 16 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 16 autocmod 2.8 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2020-Nov-27 18:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin