Search of Precession period of comet C/2011 L4 PANSTARRS

A search of periodicities ( precession period ) of comet C/2011 L4 PANSTARRS based in 302 visuals observations from ICQ , COMET OBS and OBSERVADORESCOMETAS ,processed by software of analysis NASA EXOPLANET ARCHIVE , the preliminar results indicate Power 25.14 , the possible firts period of 42 days , based in periodogram type Lomb-Scargle , in the range 10 < P precess < 50 days .

Image from HUBBLE SPACE TELESCOPE Imaging Polarimetry of the 2013 Comet ISON with ACS

Image from HUBBLE SPACE TELESCOPE of comet C/2012 S1 ISON processed and analyzed by J.P.Navarro Pina for CIOC_ISON and COMETARY INVESTIGATION ASTROPHYSIC GROUP_FACEBOOK CREDIT : Imaging Polarimetry of the 2013 Comet ISON with ACS: A Pre-Perihelion Study of the Heterogeneous Coma PI Dean Hines (Space Telescope Science Institute)

IMAGE FROM HST OF COMET C/2012 S1 ISON .. NEW FILAMENTS DUST STRUCTURES

The image processed of ISON comet , show three possible dust structures of filaments in the exterior coma of comet . Comparison image of 17 P/Holmes show filaments interior of coma of comet .

29p outburts

Gemini Observatory Captures Comet ISON

The three images on left are through an r-band filter only, and the color composite on right includes g, i, and r bands. All are integrated for 2 x 45 seconds with the February 4 image integrated for 2 x 75 seconds (increasing the comet’s apparent brightness). During the period of this sequence, the comet shined at about magnitude 15.5-16.5 in visible light. In these images north is up [need to flip image top/bottom] east is left, and the field-of-view is about 2.5 arcminutes across, which corresponds to about 270,000-290,000 miles (435,000-470,000 kilometers) at the distance of the comet. NASA’s Swift satellite and the Hubble Space Telescope (HST) have also imaged Comet ISON recently in this region of space. Swift’s ultraviolet observations determined that the comet’s main body was spewing some 850 tons of dust per second at the beginning of the year, leading astronomers to estimate the comet’s nucleus diameter is some 3-4 miles (5-6 kilometers). HST scientists concurred with that size estimate, adding that the comet’s coma measures about 3100 miles (5000 km) across. Color composite produced by Travis Rector, University of Alaska Anchorage. Credit: Gemini Observatory/AURA Composite , isophotes , analysis J.P.Navarro Pina ( Cometary Investigation Astrophysic Group_Facebook / NASA JPL )

ANALYSIS UPDATE COMET C/2011 L4 PANSTARRS

COMET IKEYA -ZHANG FROM HST AND FILTER LARSON-SEKANINA

IMAGE OF ISOPHOTES OF COMET 2012 ISON

2060-CHIRON IMAGES FROM HUBBLE SPACE TELESCOPE

IMAGE OF COMET 29P/SW-1 ( FAULKES TELESCOPE SOUTH 2 MTS )

Image of comet 29P/SW-1 from 2 mts Faulkes Telescope South , note the comet's coma in a spiral due to the rapid rotation of the nucleus . Date: Mon 03 June 2013, 09:41 UT Coordinates: 13:37:19.92, -21:34:59.88 Exposure: 180.0 s Credit: Image taken with Faulkes Telescope South operated by Las Cumbres Observatory Global Telescope Network Simulation of coma structure -- ( Sekanina , 1987 )

ANALYSIS LARSON-SEKANINA FILTER 3D JETS

Analysis in 3D by larson-sekanina filter of images of comet C/1995 O1 Hale-Bopp. CREDIT : NASA/HST image