Comet C/2020 F3 NEOWISE

Comet Neowise C/2020 F3

Photos by Th.Boeckel

Update:23.Juli, mag 3,0*

The Comet with a green halo

Rottbach, Bavaria

21.23 UTC, Newton 900mm, f4.5 30 sec, ISO 800, Sony a7III

The comet's head is green. This is a sign of diatomic carbon, C₂, a gas which emits a verdant glow in the near-vacuum of interplanetary space. The comet's ion tail is blue. Once again, carbon is involved. One of the most abundant gases in comets is carbon monoxide (CO). When CO flows away from a comet's nucleus, it is ionized by solar UV radiation. Carbon monoxide ions (CO+) glow blue when they recapture electrons from the solar wind. The comet's dust tail is wan yellow. It is, simply, the color of sunlight reflected from comet dust.

source

Update:20.July , mag 1,9*

Comet Neowise with a strong ion streamer and a dust tail with vertical bands.

The visual lenghts of the imposant dust tail is now 15-20° degrees!!!

Luener See near Bludenz, Austria

22.55 UT, 1 x 44sec, Iso 800, 140mm, Canon 70-200 USM II, Sony a7III,

Timelapse animation 5MB

Update:18.July , mag 1,8*

Nördlingen, Bavaria

Strong ion streamer, 22.57 UT, 1 x 43sec, Iso 800, 140mm, Canon 70-200 USM II, Sony a7III,

Timelapse animation (1:34) 15MB

Update:14.July 20, mag 1,7*

Neowise with a strong ion tail (left) +2 meteors. The dust tail fan out into vertical stripes.

Auerberg , South Bavaria

1.23 UT, Canon70-200 USMII, Sony a73, 100mm, f2.8,48s,ISO800

Update:13.July 20, mag 1,6*

Neowise with meteor from the top of Peißenberg, South Bavaria

1.08 UT, Canon70-200 USMII, Sony a73, 63mm, f3.2,48s,ISO1600

Timelapse animation (1:47h) 23MB

Update:12.July, mag 1,5*

Neowise in clouds, only one image in a one minute cloud gap.

Gepatsch Ferner, Austria 2750m osl

.. but i like it

Update:10.July 20, mag 1,3*

Neowise above Noctilucent Clouds.

Maisach, South Bavaria

1.36 UT, 3.2sec, ISO 3200, Canon f3.2, 120mm

Timelapse animation (1:12h) 20MB

Update: 09.July 2020, mag 1,1*

Comet Neowise photographed from the Penser Joch (2211m o.sl) with view to the Wilde Kreuzspitze (3148m o.sl) belonging to the Zillertaler Alpen, Südtirol Italy

4sec, ISO 3200, Tamron f5.6, 135mm

Comet at 01:15 UT (03.15 MESZ)

Timelapse animation (1:02h) 25MB

1.11 UT, 4sec, ISO 3200, Tamron f5.0, 150mm (under) crop ca.3.5x, Sony a7III

Right: Post adapted Image shows the comet with an ion tail (red vertical line)

*mag = > light magnitude: Up to mag 3-4 stars are visible nearby cities with the naked eye, in very dark areas the seeing limit can reach up to mag 6-7.

The more higher numerical value is given, the more weaker are the objects. E.g. - 4,7 mag, Venus glittering; - 1,0 Sirius, brightest star; 3,5 M31 Andromeda, pale shiny oval)

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