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2001-05-18 · The gas activity of comet C/1999 S4 (LINEAR) was monitored at radio wavelengths during its disruption. A runaway fragmentation of the nucleus may have begun around 18 July 2000 and proceeded until 23 July. The mass in small icy debris (

The first photograph (left) shows a dramatic increase in its brightness. comet c/1999 s4 (linear) M. Kidger, Instituto de Astrofisica de Canarias, reports analysis of continued observations of C/1999 S4 at La Palma: "A 100-s exposure in R, taken by R. Corradi and N. O'Mahoney (Isaac Newton Group of Telescopes) on Aug. 1.9 UT with the Wide Field Camera on the 2.5-m Isaac Newton Telescope, shows no evidence of a nuclear condensation or subnuclei within the coma. Request PDF | C/1999 S4 (LINEAR): la morte di una cometa | The comet C/1999 S4 was expected to be a moderately bright object during summer 2000. It was observed by visual, photographic and CCD 2021-03-22 · The image below is a portion of a raw 60-seconds exposure of the field of C/1999 S4 (LINEAR). I use an Audine camera equipped with a KAF-1602E CCD and a Lichtenknecker Flat-Field Camera telescope of 190 mm in diameter at F/D=4. A Rainbow Optics grating of 200 groove/mm is placed between the Comet C/1999 S4 LINEAR is rapidly approaching both the Earth and the Sun from the outer Solar System, and should be at its brightest around 2000 July 25 in the early evening sky of northern observers. The comet was discovered by chance by project LINEAR last September.

C 1999 S4 LINEAR, 1.7 × 1028, −1.6, 0.6% (17,18), 0.1% (18). Comet LINEAR (C/1999 S4) was a comet that was observed to break apart as it approached the Sun. C/1999 S4 (LINEAR) C/1999 S4 (LINEAR) was a long-period comet discovered on September 27, 1999, by LINEAR. The comet made its closest approach to the 7 Jun 2006 C/1999 (Lee) & C/1999 S4 (LINEAR). Keck telescope - Mumma et al. 2001, Science, 292, 1334. CH3OH C2H6 #.

la LINEAR Comet, officiellement appelé C / 1999 S4 (LINEAR), est un comète périodique la système solaire. Il a été découvert 27 Septembre 1999 sous le programme LINEAR Lincoln Laboratory (MIT), Pour rechercher astéroïdes, quand il était sur le point 4.33 UA soleil, au voisinage de l'orbite Jupiter. The results from the analysis of the extensive CCD photometry that we haveobtained during the long-term monitoring (from its discovery until its break-up)of comet C/1999 S4 (linear) are presented here.

X-rays from Comet C/1999 S4 (LINEAR). On July 14, 2000 the Chandra X-ray Observatory imaged the comet repeatedly for a total of 2 ½ hours and detected X-rays from oxygen and nitrogen ions.

| Find, read and cite all the research you need on ResearchGate La cometa LINEAR, formalmente indicata come C/1999 S4 (LINEAR), è una cometa non periodica del Sistema solare. È stata scoperta il 27 settembre 1999 nell'ambito del programma LINEAR del Lincoln Laboratory (), per la ricerca di asteroidi, quando si trovava a circa 4,33 UA dal Sole, in prossimità dell'orbita di Giove.

Improved parabolic orbital elements from MPC 37026 (and ephemeris extension to IAUC 7285): T = 2000 July 26.1053 TT Peri. = 151.0719 Node = 83.1520 2000.0 q = 0.763984 AU Incl. = 149.3583 1999/00 R. A. (2000) Decl. Delta r Elong. Phase m1 Dec. 28 2 21.84 +33 00.8 2.627 3.305 126.2 13.9 14.3 Jan. 7 2 05.20 +31 22.1 2.673 3.187 112.9 16.5 14.2 17 1 52.35 +29 49.1 2.737 3.067 100.1 18.4 14.1 27 1

Intense solar heating apparently triggered a massive disruption of the comet's fragile icy core when it passed close to the Sun last week. International Astronomical Union Circular No.7472, 3-Aug-200 COMET C/1999 S4 (LINEAR) Talk:C/1999 S4 (LINEAR) Jump to navigation Jump to search.

The distribution of the dust La cometa LINEAR, formalmente indicata come C/1999 S4 (LINEAR), è una cometa non periodica del Sistema solare. È stata scoperta il 27 settembre 1999 nell'ambito del programma LINEAR del Lincoln Laboratory (), per la ricerca di asteroidi, quando si trovava a circa 4,33 UA dal Sole, in prossimità dell'orbita di Giove. È stata seguita - salvo una breve parentesi - dal giorno della sua In the current paradigm, Oort cloud comets formed in the giant planets' region of the solar nebula, where temperatures and other conditions varied greatly. The measured compositions of four such comets (Halley, Hyakutake, Hale-Bopp, and Lee) are The results from the analysis of the extensive CCD photometry that we haveobtained during the long-term monitoring (from its discovery until its break-up)of comet C/1999 S4 (linear) are presented here. Our observations showthat the comet did not always behave as expected: it showed activity ahead oftime and in the end became fainter instead of brighter as it approached perihelion.A sequence of 2010-01-01 2007-03-09 Combined BIMA and OVRO Observations of Comet C/1999 S4 (LINEAR) comet C/1999 S4 (LINEAR), hereafter called C/LINEAR, underwent multiple fragmenta-tions during its recent apparition, culminating in the complete disruption of its nucleus during the latter part of July 2000 (5). C/LINEAR did not pass particularly close to any major plane-tary body during its … CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): We present results from an observing campaign of the molecular content of the coma of comet C/1999 S4 (LINEAR) carried out jointly with the millimeter-arrays of the Berkeley-Illinois-Maryland Association (BIMA) and the Owens Valley Radio Observatory (OVRO).
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Delta r Elong. Phase m1 Dec. 28 2 21.84 +33 00.8 2.627 3.305 126.2 13.9 14.3 Jan. 7 2 05.20 +31 22.1 2.673 3.187 112.9 16.5 14.2 17 1 52.35 +29 49.1 2.737 3.067 100.1 18.4 14.1 27 1 2007-02-01 · Comet C/1999 S4 (LINEAR) was exceptional in many respects. Its nucleus underwent multiple fragmentations culminating in the complete disruption around July 20, 2000. We present circular polarization measurements along the cuts through the coma and nucleus of the comet during three separate observing runs, in June 28–July 2, July 8–9, and July 21–22, 2000. Comet C/1999 S4 (LINEAR) showed a very special behaviour between 28 June and1 July 2000.

LINEAR obtained additional images on September 28 and October 1. C/1999 S4 (LINEAR) Classification: Hyperbolic Comet SPK-ID: 1000273 1999-09-27 last obs. used : 2000-07-24 planetary ephem. DE431 SB-pert.
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Comet C/1999 S4 LINEAR is rapidly approaching both the Earth and the Sun from the outer Solar System, and should be at its brightest around 2000 July 25 in the early evening sky of northern observers. The comet was discovered by chance by project LINEAR last September.

The measured compositions of four such comets (Halley, Hyakutake, Hale-Bopp, and Lee) are The results from the analysis of the extensive CCD photometry that we haveobtained during the long-term monitoring (from its discovery until its break-up)of comet C/1999 S4 (linear) are presented here. Our observations showthat the comet did not always behave as expected: it showed activity ahead oftime and in the end became fainter instead of brighter as it approached perihelion.A sequence of 2010-01-01 2007-03-09 Combined BIMA and OVRO Observations of Comet C/1999 S4 (LINEAR) comet C/1999 S4 (LINEAR), hereafter called C/LINEAR, underwent multiple fragmenta-tions during its recent apparition, culminating in the complete disruption of its nucleus during the latter part of July 2000 (5).

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X-rays from Comet C/1999 S4 (LINEAR). On July 14, 2000 the Chandra X-ray Observatory imaged the comet repeatedly for a total of 2 ½ hours and detected X-rays from oxygen and nitrogen ions.

Comet C/1999 S4 (LINEAR) passed its closest point to Earth, 0.364 AU, on 23 July 2000, 3 days before it reached perihelion.