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- 1999_S4 abstract "C/1999 S4 (LINEAR) is a long-period comet discovered on September 27, 1999, by LINEAR.The comet made its closest approach to the Earth on July 22, 2000, at a distance of 0.3724 AU (55,710,000 km; 34,620,000 mi). It came to perihelion on July 26, 2000, at a distance of 0.765 AU from the Sun.The comet nucleus was estimated to be about 0.9 km in diameter. Before the comet broke up, the (dust and water) nucleus erosion rate was about 1 cm per day. The comet brightened near July 5, 2000, and underwent a minor fragmentation event.The comet brightened again around July 20, 2000, and then disintegrated. The published optical and most radio data support that the main nuclear decay started July 23, 2000. The dust cloud expanded at about 20 meters per second (45 miles per hour) while the fragments expanded at around 7 m/s (16 mph). Other comets are known to have disappeared, but Comet LINEAR is the first one to have been caught in the act.The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2010-Jan-01 generate a semi-major axis of 700 AU, an aphelion distance of 1400 AU, and a period of approximately 18,700 years.".
- 1999_S4 thumbnail CometLinear.jpg?width=300.
- 1999_S4 wikiPageExternalLink text.
- 1999_S4 wikiPageExternalLink 1999+S4.
- 1999_S4 wikiPageExternalLink 1999s4.html.
- 1999_S4 wikiPageExternalLink 26.
- 1999_S4 wikiPageExternalLink ast31jul_1m.
- 1999_S4 wikiPageExternalLink 1999+S4;orb=1.
- 1999_S4 wikiPageExternalLink 1999S4.html.
- 1999_S4 wikiPageExternalLink eso0026.
- 1999_S4 wikiPageID "32953009".
- 1999_S4 wikiPageLength "5991".
- 1999_S4 wikiPageOutDegree "20".
- 1999_S4 wikiPageRevisionID "672378634".
- 1999_S4 wikiPageWikiLink Astronomical_unit.
- 1999_S4 wikiPageWikiLink Barycenter.
- 1999_S4 wikiPageWikiLink Category:Astronomical_objects_discovered_in_1999.
- 1999_S4 wikiPageWikiLink Category:Comets.
- 1999_S4 wikiPageWikiLink Comet.
- 1999_S4 wikiPageWikiLink Comet_nucleus.
- 1999_S4 wikiPageWikiLink Epoch_(astronomy).
- 1999_S4 wikiPageWikiLink Gary_W._Kronk.
- 1999_S4 wikiPageWikiLink Hubble_Space_Telescope.
- 1999_S4 wikiPageWikiLink JPL_Horizons_On-Line_Ephemeris_System.
- 1999_S4 wikiPageWikiLink Julian_day.
- 1999_S4 wikiPageWikiLink Julian_year_(astronomy).
- 1999_S4 wikiPageWikiLink Lincoln_Near-Earth_Asteroid_Research.
- 1999_S4 wikiPageWikiLink List_of_observatory_codes.
- 1999_S4 wikiPageWikiLink Osculating_orbit.
- 1999_S4 wikiPageWikiLink Perihelion_and_aphelion.
- 1999_S4 wikiPageWikiLink Semi-major_axis.
- 1999_S4 wikiPageWikiLink File:CometLinear.jpg.
- 1999_S4 wikiPageWikiLinkText "C/1999 S4 (LINEAR)".
- 1999_S4 wikiPageWikiLinkText "C/1999 S4".
- 1999_S4 aphelion "~1400 AU".
- 1999_S4 caption "--08-05".
- 1999_S4 discoverer "LINEAR".
- 1999_S4 discoveryDate "1999-09-27".
- 1999_S4 eccentricity "1.0001".
- 1999_S4 epoch "2000-02-17".
- 1999_S4 inclination "149.38".
- 1999_S4 lastP "2000-07-26".
- 1999_S4 name "C/1999 S4".
- 1999_S4 nextP "unknown/disintegrated".
- 1999_S4 perihelion "0.76509".
- 1999_S4 period "5.9012712E11".
- 1999_S4 semimajor "~700 AU".
- 1999_S4 wikiPageUsesTemplate Template:Comets.
- 1999_S4 wikiPageUsesTemplate Template:Convert.
- 1999_S4 wikiPageUsesTemplate Template:Infobox_Comet.
- 1999_S4 wikiPageUsesTemplate Template:Reflist.
- 1999_S4 subject Category:Astronomical_objects_discovered_in_1999.
- 1999_S4 subject Category:Comets.
- 1999_S4 hypernym Comet.
- 1999_S4 type Planet.
- 1999_S4 comment "C/1999 S4 (LINEAR) is a long-period comet discovered on September 27, 1999, by LINEAR.The comet made its closest approach to the Earth on July 22, 2000, at a distance of 0.3724 AU (55,710,000 km; 34,620,000 mi). It came to perihelion on July 26, 2000, at a distance of 0.765 AU from the Sun.The comet nucleus was estimated to be about 0.9 km in diameter. Before the comet broke up, the (dust and water) nucleus erosion rate was about 1 cm per day.".
- 1999_S4 label "C/1999 S4".
- 1999_S4 sameAs Q522176.
- 1999_S4 sameAs 1999_S4_(LINEAR).
- 1999_S4 sameAs 1999_S4_LINEAR.
- 1999_S4 sameAs 1999_S4_(LINEAR).
- 1999_S4 sameAs 1999_S4.
- 1999_S4 sameAs m.0h55pcj.
- 1999_S4 sameAs Q522176.
- 1999_S4 wasDerivedFrom 1999_S4?oldid=672378634.
- 1999_S4 depiction CometLinear.jpg.
- 1999_S4 isPrimaryTopicOf 1999_S4.