+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   35P/Herschel-Rigollet Classification: Halley-type Comet* [NEO]          SPK-ID: 1000043 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] alternate orbits: [epoch=1939-Aug-05.0] SAO/1939 (default) [epoch=1788-Nov-23.0] SAO/1788 Orbital Elements at Epoch 2429480.5 (1939-Aug-05.0) TDB Reference: SAO/1939 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.97405 n/a   a 28.8435453 n/a au q 0.74849 n/a au i 64.207 n/a deg node 355.980 n/a deg peri 29.298 n/a deg M 359.9715976 n/a deg tp 2429484.964 (1939-Aug-09.46400000) n/a TDB period 56613.75 155.00 n/a n/a d yr n 0.0063625 n/a deg/d Q 56.9386006 n/a au   Orbit Determination Parameters    # obs. used (total)      75      first obs. used      1788-??-??      last obs. used      1940-??-??      producer      Marsden   Additional Information  T_jup = 0.644   2008 SAO Comet Catalog  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 8.3   n/a Bull. Astron. Inst. Czechosl., v.40 (1989)   comet total magnitude slope K1 10   n/a Bull. Astron. Inst. Czechosl., v.40 (1989)   35P/Herschel-Rigollet          Discovered 1788-Dec-21 by Herschel, Caroline at Slough Reference: comet.dis Last Updated: 2003-08-29 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1939.6   35P/1939 O1   1939 VI   1939h   1784.6   35P/1788 Y1   1788 II    [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Apr-14 06:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin