Cometa -
( 17P Holmes )

Come si può notare dalle immagini questa  cometa ha una particolarità insolita,è attorniata da un vasto alone circolare " Probabilmente in realtà tendente allo sferico " di materia nella parte periferica, mentre avvicinandosi alla parte del nucleo tende ad assumere una forma ovoidale.
Ciò è dovuto ad un outburst ( scoppio ) della stessa durante il suo percorso orbitale.
Nella sequenza notate alcuni fotogrammi ai quali sono stati applicati dei falsi colori con l'ausilio delle " Palette " del software di trattamento ed elaborazione di immagini astronomiche "Astroart", ciò ha permesso di evidenziare alcuni particolari strutturali della cometa nella sua complessità.

                                   
Comet - ( 17P Holmes )

As you/he/she can be noticed by the images this comet it has a particularity extraordinary,è Probably surrounded by a vast circular " halo in reality tendent to the spherical " one of subject in the peripheral part, while approaching himself/herself/itself to the part of the nucleus extends to assume an ovoidal form. 
This is due to an outburst (burst) of the same one during his/her orbital run. 
In the sequence noticed some frames to which have been applied some forgeries colors with the aid of the " Shovels " of the software of treatment and elaboration of astronomic images "Astroart", this has allowed to underline some structural details of the comet in his/her complexity.

       Dati strumentali - Instrumental data

CCD Photo Acquisition: Starlight Xpress SXV-H9
Optic configuration of the telescope:
W.O.Megrez SD2 80 mm. F 555mm  f/d 6,9 ( apograde TMB ) + focal reducer f 6,3 Meade. Effective focal 352mm. f/d 4,4 frammed field 1,5 x 1,1 degrees
German Equatorial Mount:
Gemini G 41 Observatory Plus and FS 2 system control
Luminance integration time:
Sum of 16 frame from 60" each with  filter Astronomik CLS profi
Software used for the acquisition and the elaboration:
CCDSoft, Photoshop CS, Astroart,
Date of acquisition:
2007-11-10 - h17:45 U.T
Zone of acquisition:
Fixed posting of San Giuliano P.no ( Piacenza ) Italy
Author Astroimager:
Davide Romanini
- ASTRODAVID -


P17H-BWh9.JPG (64118 byte)

Holmes_20071031_2040ut_sbar.jpg (96648 byte)

P17Hpal4.JPG (31705 byte)

P17Hpal1h9.JPG (122339 byte)

P17Hpal2.JPG (154113 byte)

B-W

Colors

BW Negative

BW Tooth of saw

BW Tooth of saw 2

P17Hpal7.JPG (39063 byte)

P17Hpal6.JPG (66687 byte)

P17Hpal3.JPG (50682 byte)

P17Hpal8.JPG (85795 byte)

P17Hpal5.JPG (106580 byte)

Pal BW-False Colors

Pal BW-False Color 2

Pal False color A

Pal False color B

Pal False color C


Information for 10 nov 2007 18.45.12

(Julian day number 2454415.24042)
Name: 17P Holmes
Magnitude: 17.0
Elongation: 145.9°
Distance: 1.6228 AU (242.8 million km)
Radius vector: 2.5050 AU (374.8 million km)
Horizontal parallax: 5.42"
Topocentric coordinates
Apparent coordinates for the epoch of date:
Right ascension: 3h 35m 24.5s
Declination: +50° 37' 25"
Constellation: Perseus

Data:SkyMap