{"id":23198,"date":"2021-09-01T13:00:57","date_gmt":"2021-09-01T13:00:57","guid":{"rendered":"https:\/\/www.skyatnightmagazine.com\/?p=96743"},"modified":"2021-09-01T13:17:09","modified_gmt":"2021-09-01T13:17:09","slug":"tracking-comet-c-2015-v2-johnson","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/rss_feed\/tracking-comet-c-2015-v2-johnson\/","title":{"rendered":"Tracking Comet C\/2015 V2 Johnson"},"content":{"rendered":"

<\/p>

By Lee Dyson\n \t\t<\/p>

Published: Wednesday, 01 September 2021 at 12:00 am<\/p>

\n\n

C\/2015 V2 Johnson is a hyperbolic comet that was discovered on 3 November 2015 by Jess Johnson from the Catalina Sky Survey. It has an orbital period of 14 million years. At closest approach to the Sun it was 1.64AU.<\/p>\n

The comet<\/a> was observed and photographed by many people around the world, such as amateur astrophotographer Tony Horton, who captured it from Ross On Wye, Herefordshire, UK (see below).<\/p>\n

For astro-imaging advice, read our beginner\u2019s guide to astrophotography<\/a>, and don\u2019t forget to send us your images<\/a> or share them with us via Facebook<\/a>, Twitter<\/a> and Instagram<\/a>.<\/strong><\/em><\/p>\n

\n
\""Comet\"<\/div>
Comet C\/2015 V2 Johnson by Tony Horton, Ross On Wye, Herefordshire, UK. Equipment: Canon EOS 1100d, Altair Starwave 80ED-R, Celestron AVX Mount.<\/span><\/figcaption><\/div>\n

\u00a0<\/p>\n

But one person who really captured the progress of C\/2015 Johnson at its best was comet-hunter and astrophotographer Jos\u00e9 J. Chamb\u00f3, who observed and imaged the comet from Valencia, in Spain.<\/p>\n

Jos\u00e9 captured some beautiful images of the comet using an Atik 383L+ camera and a GSO 8-inch telescope.<\/p>\n

He captured this one on 4 February 2017 from Valencia, Spain.<\/p>\n

\""The\"<\/div>
The Spring of Comet Johnson by Jos\u00e9 J. Chamb\u00f3 Bris, Mayhill, New Mexico. Equipment: Planewave 17\u2033 CDK 1940mm f\/4.5, FLI-PL6303E<\/span><\/figcaption><\/div>\n

Jos\u00e9 said: \u201cThe comet is now four months within reach perihelion and with a brightness of +10.5 magnitude. Its dense tail of dust is 12 arcminutes long, while this image clearly shows around the head an outer gassy coma with green colour of 5 arcminutes that corresponds to a sphere of 350,000 km in diameter.\u201d<\/p>\n

He then captured another image of the comet (see below) on 26 March 2017, also from Valencia.<\/p>\n

He said \u201cAt this time the comet had a brightness of mag. +9.5 and, as can be seen in this image, a greenish coma with a diameter of 10 arcminutes and a dust tail near 20 arcminutes toward northwest.\u201d<\/p>\n

\""Comet\"<\/div>
Comet C\/2015 V2 Johnson by Jos\u00e9 J. Chamb\u00f3, Valencia, Spain. Equipment: GSO 8\u2033 f\/3.7, Atik 383L+<\/span><\/figcaption><\/div>\n

Jos\u00e9 then captured the following image of Comet C\/2015 V2 (Johnson) remotely on 5 April 2017 from Mayhill, New Mexico, USA using an FLI-PL11002M camera and a Planewave 20-inch CDK telescope.<\/p>\n

\""Comet\"<\/div>
Comet C\/2015 V2 (Johnson) by Jos\u00e9 J. Chamb\u00f3, Mayhill, New Mexico. Equipment: Planewave 20\u2033 CDK 2280mm f\/4.5, FLI-PL11002M<\/span><\/figcaption><\/div>\n

On 2 May 2017, Jos\u00e9 photographed the comet again from Valencia, Spain, resulting in the image below.<\/p>\n

He said: \u201cAs well as from the tail of dust grains that remains to northwest, the comet has an ionic tail more narrower and fainter, which is departing from the coma toward southwest (to bottom right), although it is barely visible in this image. The bright red star is mag. +5.4 2 Herculis.\u201d<\/p>\n

\""Comet\"<\/div>
Comet C\/2015 V2 Johnson by Jos\u00e9 J. Chamb\u00f3, Valencia, Spain. Equipment: GSO 8\u2033 f\/3.7, Atik 383L+<\/span><\/figcaption><\/div>\n

On 17 May 2017, Jos\u00e9 captured the image below of the comet, remotely from New Mexico.<\/p>\n

He said: \u201cIn this wide-field image we can see its dust tail departing toward northwest (to bottom right) and its more faint ionic tail to south toward the brightest star Delta Bootis at left.\u201d<\/p>\n

\u00a0<\/p>\n

\""Comet\"<\/div>
Comet Johnson Approaches by Jos\u00e9 J. Chamb\u00f3, New Mexico, USA. Equipment: Takahashi FSQ-106ED f\/5.0 SBIG STL-11000M.<\/span><\/figcaption><\/div>\n

The same night, Jos\u00e9 captured the comet in-situ from his back garden in Valencia, Spain, the results of which can be seen below.<\/p>\n

Jos\u00e9 said: \u201cA few hours after getting my previous wide field picture remotely, I took this more narrow image of comet C\/2015 V2 (Johnson) from my backyard with habitual equipment.<\/p>\n

\u201cAs well as the dust tail with a reddish hue toward bottom right corner, although very faint we can also see the narrow ionic tail toward left, leaving the field.\u201d<\/p>\n

\""Comet\"<\/div>
Comet C\/2015 V2 Johnson by Jos\u00e9 J. Chamb\u00f3, Valencia, Spain. Equipment: GSO 8\u2033 f\/3.7, Atik 383L+<\/span><\/figcaption><\/div>\n

Jos\u00e9 then captured the image of the comet below on 24 June 2017 from Valencia.<\/p>\n

\""Comet\"<\/div>
Comet C\/2015 V2 Johnson by Jos\u00e9 J. Chamb\u00f3, Valencia, Spain. Equipment: GSO 8\u2033 760mm f\/3.8, Atik 383L+<\/span><\/figcaption><\/div>\n

He said: \u201cIn this image the comet was going away from Sun and Earth but still kept maintained a brightness of +7.5 magnitude and a coma 15 arcminutes in diameter, a dust tail stretching up to the north edge of the photo and very faint ionic tail barely visible toward south-east (down-left).<\/p>\n

\u201cSome small galaxies appear in this image in the Virgo constellation: notably NGC 5506 and NGC 5507 in the upper right corner.\u201d<\/p>\n

Thanks to Jos\u00e9 for sharing his images with us. For more of Jos\u00e9\u2019s work, visit his Astrobin<\/a> page.<\/strong><\/em><\/p>\n

\u00a0<\/p>\n

","protected":false},"excerpt":{"rendered":"

By Lee Dyson Published: Wednesday, 01 September 2021 at 12:00 am C\/2015 V2 Johnson is a hyperbolic comet that was discovered on 3 November 2015 by Jess Johnson from the Catalina Sky Survey. It has an orbital period of 14 million years. At closest approach to the Sun it was 1.64AU. The comet was observed […]<\/p>\n","protected":false},"author":24,"featured_media":0,"template":"","categories":[34],"acf":{"readingTimeMinutes":"5"},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"By Lee Dyson Published: Wednesday, 01 September 2021 at 12:00 am C\/2015 V2 Johnson is a hyperbolic comet that was discovered on 3 November 2015 by Jess Johnson from the Catalina Sky Survey. It has an orbital period of 14 million years. At closest approach to the Sun it was 1.64AU. The comet was observed…","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed\/23198"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=23198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=23198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}