Comets and As­teroids

Mi­nor planet Juno.

Sky at Night Magazine - - CONTENTS -

Mi­nor planet Juno reaches op­po­si­tion on 2 July. In June, you can find it pass­ing close to the tail of Aquila, the Ea­gle, in­ci­den­tally the same gen­eral area we cover in our Deep­Sky Tour on page 62.

This was the third mi­nor planet dis­cov­ered af­ter Ceres (now a dwarf planet) and Pal­las. It was dis­cov­ered by Ger­man as­tronomer Karl Lud­wig Hard­ing in Septem­ber 1804 and is now known to be the 11th-largest of this class of body. It is also a main belt as­ter­oid, with an or­bital pe­riod of 4.36 years. At per­i­he­lion it comes within 2.0 AU (299 mil­lion km) of the Sun, mov­ing out to 3.3 AU (494 mil­lion km) at aphe­lion.

At 01:00 BST (00:00 UT) on 1 June, Juno can be found roughly mid-way be­tween mag. +3.4 Lambda (h) and mag. +4.0 12 Aquilae. From this lo­ca­tion, it slowly moves to the west, pass­ing across the bor­der from Aquila and into Scu­tum on 10 June. Its west­ward track has it pass­ing just less than 2º north of the won­der­ful Wild Duck Clus­ter, M11, on 18-21 June. At this time it’ll also be about 0.33º north of 9th-mag­ni­tude open clus­ter NGC 6704, and this is a pos­si­ble pho­to­graphic op­por­tu­nity.

On the night of 24 June and into the morn­ing of 25 June, Juno passes 8 ar­cmin­utes south of mag. +4.2 Beta (`) Scuti and ends the month 1º south of the mag. +9.2 open clus­ter Trum­pler 35 (Collinder 388).

Juno bright­ens from mag. +10.2 on the 1st to +9.8 by the 30th. The best way to see it is ei­ther through large binoc­u­lars or through a small scope. The best way to iden­tify it is to sketch or im­age the area of sky you be­lieve it to be in, then, re­peat the process an­other night and com­pare your re­sults. If one of the ‘stars’ ap­pears to move, this is likely to be Juno.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.