+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   C/1844 Y1 (Great comet) Classification: Comet          SPK-ID: 1000781 [ Ephemeris | Orbit Diagram | Orbital Elements ] [ show orbit diagram ] Orbital Elements at Epoch 2394920.5 (1844-Dec-20.0) TDB Reference: SAO_2008 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.999302 n/a   a 358.9355301 n/a au q 0.250537 n/a au i 45.5651 n/a deg node 120.5910 n/a deg peri 177.5055 n/a deg M 0.0008419 n/a deg tp 2394914.6914 (1844-Dec-14.19140000) n/a TDB period n/a n/a n/a n/a d yr n 0.0001449 n/a deg/d Q 717.6205232 n/a au   Orbit Determination Parameters    # obs. used (total)      41      data-arc span      72 days      first obs. used      1844-12-27      last obs. used      1845-03-09      producer      Sekanina   Additional Information  T_jup = 0.449   epoch may be 2394921.0 (hour ambiguous: 12h/0h)   2008 SAO Comet Catalog  [ Ephemeris | Orbit Diagram | Orbital Elements ] no physical parameters available [ Ephemeris | Orbit Diagram | Orbital Elements ] 2021-Feb-25 03:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin