BRIXIIS Astronomical Observatory

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Astrometric data for minor planet center



COD B96

CON E. Bryssinck, BRIXIIS Observatory, 9150 Kruibeke , Belgium

OBS E. Bryssinck

MEA E. Bryssinck

TEL 0.4-m f/3.8 reflector + CCD

ACK MPCReport file updated 2020.07.23 19:34:47

NET Gaia DR2

    CK20F030  C2020 07 22.89523 10 24 57.28 +44 52 52.5           9.0 G      B96

    CK20F030  C2020 07 22.89661 10 24 58.92 +44 52 45.5           9.0 G      B96

    CK20F030  C2020 07 22.89771 10 25 00.23 +44 52 40.3           9.0 G      B96

----- end -----


Comet C/2020 F3 (NEOWISE) -  22 july 2020

Af(rho) data according the CARA-approach is available via request to CARA-coordinator


http://cara.uai.it

Photometric data obtained from FOCAS-II software

COD B96

OBS BRIXIIS Observatory

CATALOG: Gaia DR2 - BAND: G


                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  -------------------  -----  -----  -----  -----  -----  -----  ----  ----  ---

C/2020 F3     22/07/2020 21:30:54   8.23   7.12   6.54   6.16   5.89   5.69  37.9  16.7  B96

C/2020 F3     22/07/2020 21:30:54*  0.01   0.01   0.00   0.01   0.01   0.01    10   3.1  Gai


                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

C/2020 F3     22/07/2020 21:30:54    0.69   0.63  39.86   6.20   38   5998   158  3.778  B96


FoCAs 3.66

www.astrosurf.com/cometas-obs

es.groups.yahoo.com/group/Cometas_Obs

Afρ [cm] vs. core distance (in km) - data obtained from ccd-image with Bessel R filter

Afρ parameter according CARA approach

Image of comet C/2020 F3 (NEOWISE) taken on 22 july while this comet was on about 140 milljon km from earth and about 94 million km from the sun. Image taken from my backyard observatory with a 0.4-m f/3.8 Newton telescope (Orion Optics AG16)

comet C/2020 F3 (NEOWISE) on 22 july, Erik Bryysinck, E. Bryssinck

Below is a high resolution spectrum of the sodium doublet which was observed in the coma of the comet, just after the perihelion.  By the time this spectrum was taken, the emission of sodium had already been greatly reduced.  No doppler shift can be observed because at the time of observation the comet just changed direction with respect to the Earth. Therefore the sodium emission lines of the comet and the earth's atmosphere (light pollution) coincide. This is not 100 % certain, it is possible that the rest of the emission lines of the earth's atmosphere are still in the spectrum.


Translated with www.DeepL.com/Translator (free version)