Comet C/2015 F3 (SWAN)

 

2015-05-07

TEL 0.205-m f/5.5 reflector + CCD SBIG ST10XME + CLR Astrodon filter, CCD@-23°C.

f=1125mm, field 45.4‘x30.6’, 1.25’’/pixel, white circle diameter = 300 pixels = 374’’.

North up, East left. Aperture radius in Astrometrica = 10 pixels = 12.5’’.

41x30s from 21:16UT to 21:39UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK15F030 KC2015 05 07.88270 10 57 59.22 +75 54 16.2          17.6 N      K25

    CK15F030 KC2015 05 07.89756 10 58 03.93 +75 52 54.9          18.2 N      K25

Very diffuse, aperture radius set to 12.5’’.

Conditions: seeing.jpg. Observation before Moonrise.

2015-05-10

TEL 0.205-m f/5.5 reflector + CCD SBIG ST10XME + CLR Astrodon filter, CCD@-18°C.

f=1125mm, field 45.4‘x30.6’, 1.25’’/pixel, white circle diameter = 300 pixels = 374’’.

North up, East left. Aperture radius in Astrometrica = 7 pixels = 8.75’’.

55x30s from 20:54UT to 21:52UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK15F030 KC2015 05 10.87594 11 11 41.27 +71 24 02.1          18.7 N      K25

    CK15F030 KC2015 05 10.89950 11 11 46.21 +71 21 57.4          19.3 N      K25

Very diffuse, aperture radius set to 8.75’’.

Conditions: seeing.jpg.