Comet C/2011 L4 (PANSTARRS)

 

2013-03-12

Top: 18:16UT 1/15s  Moon 0.93-day old, 0.94% illuminated, elongation 11°

Bottom left: 18:30UT 0.8s. Right: 18:38UT 2s. The village is Vachères, 6km West of the observatory. Olympus-OM-Zuiko 300mm f/4.5 + Canon 350D @ 400 ISO. Comet seen from the OHP T193 dome catwalk.

2013-03-13

18:14UT 1/2s Olympus-OM-Zuiko 300mm f/4.5 + Canon 350D @ 400 ISO.  Only the Moon is visible above the clouds on the West horizon...

2013-03-14

Left: 18:42UT 3.2s, top right 18:30UT 0.6s, bottom right 19:51-52UT 2x3.2s.

Olympus-OM-Zuiko 300mm f/4.5 + Canon 350D @ 400 ISO. Observations from the OHP T193 dome catwalk.

2013-03-18

Left: 12x2s from 18:58UT to 19:04UT, recentered on stars with MaximDL.

Right: 19x2s from 18:58UT to 19:06UT, recentered on stars with MaximDL.

Olympus-OM-Zuiko 180mm f/2.8 + Canon 350D @ 800 ISO. Native sampling 7.4’’/pixel, here binned 2x2. Processing MaximDL + Gimp2.8. Observations from the OHP T193 dome catwalk.

2013-03-20

33x2s from 18:53UT to 19:03UT, recentered on stars with MaximDL. Background flattened.

Olympus-OM-Zuiko 180mm f/2.8 + Canon 350D @ 400 ISO. Native sampling 7.4’’/pixel, here binned 2x2. Processing MaximDL + Gimp2.8. Observations from the OHP T193 dome catwalk.

2013-03-21

Left: 11x2s from 18:50UT to 18:53UT, recentered on stars with MaximDL.

Right: 24x2s from 19:04UT to 19:09UT, recentered on stars with MaximDL. B&W versions have a flattened background.

Olympus-OM-Zuiko 180mm f/2.8 + Canon 350D @ 800 ISO. Native sampling 7.4’’/pixel, here binned 2x2. Processing MaximDL + Gimp2.8. Observations from the OHP T193 dome catwalk.

2013-05-20

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + Astrodon XOP-BB filter , CCD@-23°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left. Aperture radius in Astrometrica = 4 pixels = 6.60’’.

30x40s from 22:11UT to 22:35UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK11L040  C2013 05 20.92495 22 31 56.01 +82 33 27.3          12.3 N      511

    CK11L040  C2013 05 20.92550 22 31 55.43 +82 33 28.6          12.3 N      511

    CK11L040  C2013 05 20.92605 22 31 55.10 +82 33 29.4          12.3 N      511

    CK11L040  C2013 05 20.92660 22 31 54.47 +82 33 30.9          12.3 N      511

    CK11L040  C2013 05 20.92715 22 31 53.96 +82 33 32.2          12.3 N      511

    CK11L040  C2013 05 20.92770 22 31 53.59 +82 33 33.0          12.3 N      511

    CK11L040  C2013 05 20.92825 22 31 53.01 +82 33 34.5          12.3 N      511

    CK11L040  C2013 05 20.92880 22 31 52.59 +82 33 35.1          12.2 N      511

    CK11L040  C2013 05 20.92935 22 31 52.07 +82 33 36.7          12.3 N      511

    CK11L040  C2013 05 20.92990 22 31 51.52 +82 33 38.1          12.3 N      511

    CK11L040  C2013 05 20.93045 22 31 51.16 +82 33 39.5          12.3 N      511

    CK11L040  C2013 05 20.93100 22 31 50.55 +82 33 40.5          12.3 N      511

    CK11L040  C2013 05 20.93155 22 31 50.04 +82 33 41.7          12.3 N      511

    CK11L040  C2013 05 20.93211 22 31 49.68 +82 33 42.7          12.3 N      511

    CK11L040  C2013 05 20.93267 22 31 49.11 +82 33 43.9          12.3 N      511

    CK11L040  C2013 05 20.93322 22 31 48.74 +82 33 45.3          12.3 N      511

    CK11L040  C2013 05 20.93377 22 31 48.26 +82 33 46.2          12.3 N      511

    CK11L040  C2013 05 20.93432 22 31 47.66 +82 33 47.6          12.3 N      511

    CK11L040  C2013 05 20.93487 22 31 47.30 +82 33 49.1          12.3 N      511

    CK11L040  C2013 05 20.93542 22 31 46.71 +82 33 49.7          12.3 N      511

    CK11L040  C2013 05 20.93597 22 31 46.32 +82 33 51.2          12.3 N      511

    CK11L040  C2013 05 20.93652 22 31 45.78 +82 33 52.9          12.3 N      511

    CK11L040  C2013 05 20.93707 22 31 45.16 +82 33 54.1          12.3 N      511

    CK11L040  C2013 05 20.93762 22 31 44.81 +82 33 54.9          12.3 N      511

    CK11L040  C2013 05 20.93817 22 31 44.32 +82 33 55.7          12.3 N      511

    CK11L040  C2013 05 20.93872 22 31 43.85 +82 33 57.3          12.3 N      511

    CK11L040  C2013 05 20.93927 22 31 43.29 +82 33 58.6          12.3 N      511

    CK11L040  C2013 05 20.93983 22 31 42.73 +82 33 59.9          12.3 N      511

    CK11L040  C2013 05 20.94038 22 31 42.38 +82 34 00.9          12.3 N      511

    CK11L040  C2013 05 20.94093 22 31 41.82 +82 34 02.3          12.3 N      511

    Moon phase=57°, but at DEC=-4°.

2013-05-29

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + Astrodon XOP-BB filter , CCD@-23°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left. Aperture radius in Astrometrica = 4 pixels = 6.60’’.

29x40s from 22:45UT to 23:17UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK11L040  C2013 05 29.94831 18 21 22.35 +85 05 29.4          12.6 N      511

    CK11L040  C2013 05 29.94887 18 21 20.81 +85 05 29.2          12.6 N      511

    CK11L040  C2013 05 29.94943 18 21 19.78 +85 05 28.5          12.6 N      511

    CK11L040  C2013 05 29.94997 18 21 18.75 +85 05 28.3          12.6 N      511

    CK11L040  C2013 05 29.95053 18 21 17.41 +85 05 28.1          12.7 N      511

    CK11L040  C2013 05 29.95107 18 21 16.59 +85 05 27.3          12.7 N      511

    CK11L040  C2013 05 29.95162 18 21 15.37 +85 05 27.2          12.7 N      511

    CK11L040  C2013 05 29.95217 18 21 14.16 +85 05 27.3          12.7 N      511

    CK11L040  C2013 05 29.95272 18 21 13.48 +85 05 25.9          12.7 N      511

    CK11L040  C2013 05 29.95382 18 21 10.91 +85 05 26.0          12.7 N      511

    CK11L040  C2013 05 29.95437 18 21 10.09 +85 05 25.1          12.7 N      511

    CK11L040  C2013 05 29.95548 18 21 07.54 +85 05 24.9          12.7 N      511

    CK11L040  C2013 05 29.95658 18 21 05.31 +85 05 24.3          12.7 N      511

    CK11L040  C2013 05 29.95713 18 21 04.34 +85 05 23.9          12.7 N      511

    CK11L040  C2013 05 29.95823 18 21 02.53 +85 05 23.1          12.6 N      511

    CK11L040  C2013 05 29.95878 18 21 01.19 +85 05 22.8          12.7 N      511

    CK11L040  C2013 05 29.95933 18 20 59.94 +85 05 22.8          12.7 N      511

    CK11L040  C2013 05 29.95988 18 20 58.93 +85 05 21.9          12.6 N      511

    CK11L040  C2013 05 29.96042 18 20 57.80 +85 05 21.9          12.7 N      511

    CK11L040  C2013 05 29.96098 18 20 56.50 +85 05 21.0          12.7 N      511

    CK11L040  C2013 05 29.96153 18 20 55.90 +85 05 21.5          12.7 N      511

    CK11L040  C2013 05 29.96263 18 20 53.50 +85 05 20.1          12.6 N      511

    CK11L040  C2013 05 29.96592 18 20 46.92 +85 05 18.5          12.7 N      511

    CK11L040  C2013 05 29.96647 18 20 46.01 +85 05 17.6          12.6 N      511

    CK11L040  C2013 05 29.96702 18 20 44.68 +85 05 17.5          12.6 N      511

    CK11L040  C2013 05 29.96757 18 20 43.72 +85 05 16.8          12.6 N      511

    CK11L040  C2013 05 29.96867 18 20 41.28 +85 05 16.5          12.6 N      511

    CK11L040  C2013 05 29.96927 18 20 40.48 +85 05 15.5          12.7 N      511

    CK11L040  C2013 05 29.97037 18 20 37.76 +85 05 15.6          12.7 N      511

Wind.

2013-05-29

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + Astrodon XOP-BB filter , CCD@-23°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left.

28x (on nucleus), 23x , 23x and 29x40s from 22:45UT to 00:36UT, recentered on comet with Astrometrica. Mosaic with Iris and Gimp, linear stretch (white background) and log (black background).  Anti-tail imaged over approx. 1.6°.  Moon present, full Moon + 5 days.

linear stretch                                          log stretch                                       log stretch

50% scale                                              50% scale                                      full image

2013-06-13

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + CLR filter , CCD@-17°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left. Aperture radius in Astrometrica = 4 pixels = 6.60’’.

20x40s from 22:04UT to 22:26UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK11L040  C2013 06 13.92022 14 56 47.47 +77 16 07.2          13.1 N      511

    CK11L040  C2013 06 13.92077 14 56 47.31 +77 16 06.0          13.1 N      511

    CK11L040  C2013 06 13.92132 14 56 47.20 +77 16 04.8          13.1 N      511

    CK11L040  C2013 06 13.92187 14 56 47.07 +77 16 03.5          13.1 N      511

    CK11L040  C2013 06 13.92243 14 56 46.94 +77 16 02.3          13.1 N      511

    CK11L040  C2013 06 13.92297 14 56 46.83 +77 16 01.1          13.1 N      511

    CK11L040  C2013 06 13.92463 14 56 46.52 +77 15 57.3          13.1 N      511

    CK11L040  C2013 06 13.92518 14 56 46.33 +77 15 56.1          13.1 N      511

    CK11L040  C2013 06 13.92574 14 56 46.07 +77 15 55.0          13.1 N      511

    CK11L040  C2013 06 13.92629 14 56 45.95 +77 15 53.6          13.1 N      511

    CK11L040  C2013 06 13.92684 14 56 45.95 +77 15 52.3          13.1 N      511

    CK11L040  C2013 06 13.92739 14 56 45.76 +77 15 50.9          13.1 N      511

    CK11L040  C2013 06 13.92904 14 56 45.40 +77 15 47.4          13.1 N      511

    CK11L040  C2013 06 13.92960 14 56 45.26 +77 15 46.1          13.1 N      511

    CK11L040  C2013 06 13.93015 14 56 45.11 +77 15 45.0          13.1 N      511

    CK11L040  C2013 06 13.93070 14 56 44.92 +77 15 43.5          13.1 N      511

    CK11L040  C2013 06 13.93127 14 56 44.92 +77 15 42.4          13.1 N      511

    CK11L040  C2013 06 13.93182 14 56 44.80 +77 15 41.1          13.1 N      511

    CK11L040  C2013 06 13.93402 14 56 44.21 +77 15 36.2          13.1 N      511

    CK11L040  C2013 06 13.93457 14 56 44.12 +77 15 34.7          13.1 N      511

OHP lidar laser-beam in the lower right corner, in the last 2 images from the series. Had to stop!  Don’t understand why the hot column didn’t correctly disappear after image processing.

2013-06-15

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + Astrodon XOP-BB filter , CCD@-15°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left. Aperture radius in Astrometrica = 4 pixels = 6.60’’.

30x40s from 23:14UT to 23:38UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK11L040  C2013 06 15.96881 14 50 06.11 +75 59 27.7          13.1 N      511

    CK11L040  C2013 06 15.96936 14 50 06.03 +75 59 26.5          13.1 N      511

    CK11L040  C2013 06 15.96991 14 50 05.85 +75 59 25.1          13.2 N      511

    CK11L040  C2013 06 15.97047 14 50 05.88 +75 59 24.0          13.1 N      511

    CK11L040  C2013 06 15.97101 14 50 05.76 +75 59 22.6          13.2 N      511

    CK11L040  C2013 06 15.97156 14 50 05.65 +75 59 21.6          13.1 N      511

    CK11L040  C2013 06 15.97211 14 50 05.55 +75 59 20.3          13.1 N      511

    CK11L040  C2013 06 15.97265 14 50 05.44 +75 59 19.0          13.1 N      511

    CK11L040  C2013 06 15.97320 14 50 05.35 +75 59 17.9          13.1 N      511

    CK11L040  C2013 06 15.97375 14 50 05.28 +75 59 16.7          13.2 N      511

    CK11L040  C2013 06 15.97430 14 50 05.16 +75 59 15.3          13.1 N      511

    CK11L040  C2013 06 15.97484 14 50 05.07 +75 59 14.1          13.1 N      511

    CK11L040  C2013 06 15.97539 14 50 04.96 +75 59 12.8          13.1 N      511

    CK11L040  C2013 06 15.97594 14 50 04.83 +75 59 11.5          13.2 N      511

    CK11L040  C2013 06 15.97649 14 50 04.72 +75 59 10.3          13.1 N      511

    CK11L040  C2013 06 15.97704 14 50 04.66 +75 59 09.1          13.1 N      511

    CK11L040  C2013 06 15.97759 14 50 04.61 +75 59 07.8          13.1 N      511

    CK11L040  C2013 06 15.97813 14 50 04.47 +75 59 06.6          13.1 N      511

    CK11L040  C2013 06 15.97868 14 50 04.38 +75 59 05.5          13.1 N      511

    CK11L040  C2013 06 15.97923 14 50 04.29 +75 59 04.2          13.1 N      511

    CK11L040  C2013 06 15.97978 14 50 04.20 +75 59 03.0          13.1 N      511

    CK11L040  C2013 06 15.98032 14 50 04.12 +75 59 01.8          13.1 N      511

    CK11L040  C2013 06 15.98087 14 50 04.00 +75 59 00.4          13.1 N      511

    CK11L040  C2013 06 15.98142 14 50 03.91 +75 58 59.3          13.1 N      511

    CK11L040  C2013 06 15.98197 14 50 03.81 +75 58 58.0          13.1 N      511

    CK11L040  C2013 06 15.98251 14 50 03.69 +75 58 56.8          13.1 N      511

    CK11L040  C2013 06 15.98306 14 50 03.60 +75 58 55.6          13.2 N      511

    CK11L040  C2013 06 15.98361 14 50 03.53 +75 58 54.4          13.1 N      511

    CK11L040  C2013 06 15.98416 14 50 03.45 +75 58 53.1          13.1 N      511

    CK11L040  C2013 06 15.98470 14 50 03.33 +75 58 51.8          13.1 N      511

Good seeing. Moon phase  99°, one day before First Quarter, just set when series started.

2013-08-23

TEL 0.205-m f/5.5 reflector + CCD SBIG ST8XME + SDSS r’ Gen-1 Astrodon filter, CCD@-15°C.

f=1125mm, field 42.1‘x28.1’, 1.65’’/pixel.

North up, East left. Aperture radius in Astrometrica = 4 pixels = 6.60’’.

18x60s from 21:53UT to 22:22UT, recentered on comet with Astrometrica.

NET UCAC-4

    CK11L040 KC2013 08 23.91586 14 58 33.15 +42 51 14.9          15.2 N      511

    CK11L040 KC2013 08 23.92123 14 58 33.42 +42 51 08.2          15.1 N      511

    CK11L040 KC2013 08 23.92774 14 58 33.77 +42 51 00.8          15.1 N      511

Bright Moon, phase 38° after full Moon (full Moon + 3 days).