{"id":27053,"date":"2021-12-16T00:00:00","date_gmt":"2021-12-16T00:00:00","guid":{"rendered":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/?post_type=purple_issue&p=27053"},"modified":"2022-01-11T15:57:29","modified_gmt":"2022-01-11T15:57:29","slug":"deep-sky-tour-4","status":"publish","type":"post","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/2021\/12\/16\/deep-sky-tour-4\/","title":{"rendered":"Deep-sky tour"},"content":{"rendered":"\n

Take flight around Monoceros with the Seagull Nebula and make a final stop in Canis Major<\/p>\n\n

\"\"<\/figure><\/div>\n\n
1. NGC 2232<\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
Our first stop is open cluster NGC 2232, which is located 2.4\u02da to the north and a bit west of the telescopic triple star Beta (\u03b2) Monocerotis. It\u2019s a large cluster with an overall diameter of 36 arcminutes, its core region appearing 7 arcminutes across. NGC 2232 is centred on the mag. +5.0 star 10 Monocerotis, which tends to dominate the proceedings. Two spindly \u2018legs\u2019 of stars appear to hang south from 10 Monocerotis, extending for 0.4\u02da. To the north lies a gap, before a small grouping of sixth magnitude stars is seen.<\/span> The group is attractive at low powers.<\/p>\n\n

2. M50 <\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
M50 lies nearly 10\u02da east-southeast of NGC 2232, or 4.2\u02da northeast of mag. +4.1 Theta (\u03b8) Canis Majoris, the star marking the tip of the Great Dog\u2019s nose. It\u2019s a bright, compact cluster which is well resolved at 100x power using a 150mm instrument, the view through the eyepiece revealing 70-plus of the cluster\u2019s 600 or so members. Visually, the resolved stars in the cluster give it a non-round shape; it is also known as the Heart-Shaped Cluster. A 250mm scope shows a rich cluster containing 150 stars in an area 25 arcminutes across. Many of its stars appear blue-white in colour. <\/p>\n\n

3. NGC 2335<\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
NGC 2335 is a mag. +7.2 open cluster located 1.9\u02da south-southeast of M50. It\u2019s also the gateway to the Seagull Nebula, IC 2177 (this tour\u2019s next object). The cluster sits north of the middle of a right-angled triangle formed from mag. +7.0 HIP 34357, mag. +8.1 TYC 5385–1 and mag. +7.9 TYC 5385-0206-1. Many open clusters have some defining pattern or shape and NGC 2335 is no different, containing four stars between mag. +9.5 and +11.2 that form a diamond or rhom1690bus pattern in its core.<\/span> A 250mm scope reveals about 25 stars in the cluster, all contained in an area 10 arcminutes across. Upping the aperture to 300mm increases the count to 40 stars.<\/span><\/p>\n\n

4. IC 217 7<\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
The Seagull Nebula, IC 2177, is an emission nebula with a low surface brightness narrowband nebula filter can work wonders here. The northern \u2018wing tip\u2019 is marked by NGC 2335, with the mag.<\/span> +6.7 cluster NGC 2343, 0.7\u02da further to the south-southeast. The main band of nebulosity drops south from NGC 2335, curving to the west. Variable star V750 Monocerotis (mag.<\/span> Our next target is large and faint. due to it covering an area 120 x 40 arcminutes. It is possible to see sections of the nebula using smaller instruments, but you\u2019ll need a low power and a dark sky. A<\/span> +7.0 to +8.4), 0.7\u02da southwest of NGC 2335 appears surrounded by a haze (Gum 1). <\/p>\n\n

\"\"
NGC 2359 is known as Thor\u2019s Helmet, as the curving extensions resemble the helmet\u2019s wings <\/figcaption><\/figure><\/div>\n\n
5. NGC 2353<\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
NGC 2353 is an open cluster located a bit south and 2\u02da east of NGC 2335. It\u2019s dominated by mag. +6.0 HIP 34999, located south of the cluster\u2019s centre. It is not part of the cluster, its association being nothing more than line-of-sight. The cluster\u2019s core is compact and surrounded by three stars, of magnitudes +8.8, +9.2 and +9.8, arranged in an equilateral triangle. A 250mm instrument reveals 30-plus stars scattered across an area 10 arcminutes across. One of the problems viewing NGC 2353 is the richness of the background Milky Way; it\u2019s an object easily lost against the star field it\u2019s in. A large aperture will reveal a multitude of stars, shining between mag. +9.0 and +11, in a 20-arcminute region. <\/p>\n\n

6. NGC 2359 <\/strong><\/h5>\n\n

Recommended equipment: Small\/medium or large telescope<\/strong>
The last target requires us to slip across the border into Canis Major. NGC 2359 is located 3\u02da south and 0.7\u02da east of NGC 2353. A small scope will reveal a rectangular patch of nebulosity, about 4x 1 arcminutes in size, and the appearance is assisted by the use of an OIII (oxygen) or UHC (ultra high contrast) filter. With increased aperture more nebulosity appears, a faint circular feature appearing to the north of the brighter rectangle. The circular feature is a bubble formed by the stellar wind from mag. +11.5 HIP 35378 at its centre.<\/p>\n\n

\n\n

This Deep-Sky Tour has been automated <\/strong><\/h4>\n\n

ASCOM-enabled Go-To mounts can now take you to this month\u2019s targets at the touch of a button, with our Deep-Sky Tour file for the EQTOUR app. Find it online.<\/p>\n\n

<\/div>
\n

More ONLINE <\/strong><\/h4>\n\n\n\n

Print out this chart and take an automated Go-To tour. See Bonus Content for instructions.<\/strong><\/p>\n<\/div><\/section>\n\n

<\/p>\n\n

PHOTO: MICHAEL DEGER\/CCDGUIDE.COM, CHART BY PETE LAWRENCE<\/p>\n","protected":false},"excerpt":{"rendered":"

Take flight around Monoceros with the Seagull Nebula and make a final stop in Canis Major<\/p>\n","protected":false},"author":24,"featured_media":27444,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","purple_page_number":"56","purple_custom_meta_purple_page_number":"56","purple_seq_number":"1","purple_custom_meta_purple_seq_number":"1","purple_source_article":"article_56-1.xml","purple_custom_meta_purple_source_article":"article_56-1.xml","purple_source_issue":"January-2022","purple_custom_meta_purple_source_issue":"January-2022","purple_external_id":"January-2022-56-1","purple_custom_meta_purple_external_id":"January-2022-56-1","purple_issue_code":"|0000086548||","purple_custom_meta_purple_issue_code":"|0000086548||","purple_android_product":"com.im.skyatnight.200","purple_custom_meta_purple_android_product":"com.im.skyatnight.200","purple_ios_product":"com.im.skyatnight.200","purple_custom_meta_purple_ios_product":"com.im.skyatnight.200","purple_web_product":"","purple_custom_meta_purple_web_product":"","purple_publication_id":"075fab74-0a21-4201-866a-899d6c41c40c","purple_migrated":"","kt_blocks_editor_width":""},"categories":[22],"tags":[14],"featured_image_src":"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-rotated.jpg","author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"acf":{"readingTimeMinutes":"4","apple_news_title":""},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-rotated.jpg",2048,1488,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-300x218.jpg",300,218,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-768x558.jpg",768,558,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-1024x744.jpg",800,581,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-1536x1116.jpg",1536,1116,true],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/40OYL8R07G545983TIYH1510615U-rotated.jpg",2048,1488,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":"Take flight around Monoceros with the Seagull Nebula and make a final stop in Canis Major","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27053"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/comments?post=27053"}],"version-history":[{"count":3,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27053\/revisions"}],"predecessor-version":[{"id":27696,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27053\/revisions\/27696"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media\/27444"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=27053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=27053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/tags?post=27053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}