{"id":4003,"date":"2023-04-21T21:35:29","date_gmt":"2023-04-21T19:35:29","guid":{"rendered":"http:\/\/robinfo.oma.be\/?p=4003"},"modified":"2025-02-24T16:48:32","modified_gmt":"2025-02-24T15:48:32","slug":"juin-2023-dans-le-ciel","status":"publish","type":"post","link":"https:\/\/robinfo.oma.be\/fr\/juin-2023-dans-le-ciel\/","title":{"rendered":"Juin 2023 (Dans le ciel )"},"content":{"rendered":"

AVIS IMPORTANT : Pour obtenir l\u2019heure officielle, ajouter DEUX heures aux heures indiqu\u00e9es ci-dessous (en Temps Universel UT pour Uccle)<\/i><\/span><\/span><\/p>\n

Ph\u00e9nom\u00e8nes c\u00e9lestes int\u00e9ressants<\/h3>\n

1 <\/b><\/span><\/span><\/span>D\u00e9but de l\u2019\u00e9t\u00e9 <\/span><\/span><\/span>m\u00e9t\u00e9orologique<\/i><\/span><\/span><\/span> <\/b><\/p>\n

2 <\/b><\/span><\/span><\/span>Ce soir, Mars (+1,6) au beau milieu de l\u2019amas stellaire ouvert <\/span><\/span><\/span>Praesepe<\/i><\/span><\/span><\/span> (M44 ou NGC 2032) dans la constellation du Cancer (<\/span><\/span><\/span>A observer \u00e0 l\u2019aide d\u2019une paire de jumelles ou d\u2019un petit t\u00e9lescope)<\/i><\/span><\/span><\/span><\/p>\n

3 <\/b><\/span><\/span><\/span>Ce soir, une heure apr\u00e8s le coucher du Soleil, une Lune quasi pleine au-dessus de l\u2019horizon sud-est juste au-dessus de l\u2019\u00e9toile orang\u00e9e Antar\u00e8s [Alpha Sco A (+1,2)] \u2013 <\/span><\/span><\/span>\u00e0 observer \u00e0 l\u2019aide de jumelles ou d\u2019un petit instrument par suite de la grande diff\u00e9rence de magnitude entre les deux astres<\/i><\/span><\/span><\/span> \u2013 en conjonction, vers 21 h 20 m, \u00e0 25\u2019 du bord de la Lune<\/span><\/span><\/span><\/p>\n

4 Pleine Lune<\/b><\/span><\/span><\/span> \u00e0 3 h 42 m<\/span><\/span><\/span><\/p>\n

V\u00e9nus (-4,3) en plus grande \u00e9longation orientale (45 \u00b0 E) \u00e0 11 h<\/span><\/span><\/span> <\/i><\/p>\n

5 <\/b><\/span><\/span><\/span>Le Soleil et V\u00e9nus (-4,3) ont la m\u00eame d\u00e9clinaison et une diff\u00e9rence de 3 h 18 m en ascension droite\u00a0: <\/span><\/span><\/span>une excellente occasion pour retrouver la position de V\u00e9nus en plein jour \u00e0 l\u2019aide d\u2019un petit instrument<\/i><\/span><\/span><\/span> (voir p.ex. <\/span><\/span><\/span>Ciel et Terre<\/i><\/span><\/span><\/span>, Vol. 137, 2, 2021, 62-63)<\/span><\/span><\/span><\/p>\n

6 <\/b><\/span><\/span><\/span>La Lune au p\u00e9rig\u00e9e (\u00e0 364\u00a0860 km de la Terre \u2013 Diam\u00e8tre apparent\u00a0: 32\u2019 44\u201d) \u00e0 23 h<\/span><\/span><\/span><\/p>\n

9 <\/b><\/span><\/span><\/span>La Lune \u00e0 13 \u00b0 au nord-est de Saturne (+0,9) \u00e0 1 h<\/span><\/span><\/span><\/p>\n

10<\/b><\/span><\/span><\/span> Dernier Quartier<\/b><\/span><\/span><\/span> de Lune \u00e0 19 h 31 m<\/span><\/span><\/span><\/p>\n

13 <\/b><\/span><\/span><\/span>V\u00e9nus (-4,4) au milieu de l\u2019amas stellaire ouvert Praesepe (M44 ou NGC 2032) (<\/span><\/span><\/span>voir 2 juin supra<\/i><\/span><\/span><\/span>) \u00e0 22 h<\/span><\/span><\/span><\/p>\n

14<\/b><\/span><\/span><\/span> La Lune \u00e0 1 \u00b0 de Jupiter (-2,1) bas au-dessus de l\u2019horizon est \u00e0 2 h<\/span><\/span><\/span><\/p>\n

17<\/b><\/span><\/span><\/span> Plus pr\u00e9coce lever de Soleil de l\u2019ann\u00e9e (3 h 29 m)<\/span><\/span><\/span><\/p>\n

18 Nouvelle Lune<\/b><\/span><\/span><\/span> \u00e0 04 h 37 m<\/span><\/span><\/span><\/p>\n

20<\/b><\/span><\/span><\/span> La petite plan\u00e8te (3) Juno en conjonction avec le Soleil \u00e0 8 h<\/span><\/span><\/span><\/p>\n

D\u00e8s la fin du cr\u00e9puscule du soir au-dessus de l\u2019horizon ouest, \u00e0 l\u2019aide de jumelles, en beau regroupement sur le ciel vers 21 h\u00a0: \u00e0 partir du mince croissant de Lune, en direction du nord-ouest\u00a0: les \u00e9toiles Pollux [B\u00eata Gem (+1,2)] et Castor [Alpha Gem (+1,6)], et en direction de l\u2019ouest, successivement\u00a0: V\u00e9nus (-4,4), Mars (+1,7) et R\u00e9gulus [Alpha Leo (+1,3)]<\/span><\/span><\/span><\/p>\n

21<\/b><\/span><\/span><\/span> D\u00e9but de l\u2019\u00e9t\u00e9 astronomique \u2013 Solstice d\u2019\u00e9t\u00e9<\/i><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>: le centre du disque du Soleil atteint la longitude 90\u00b000\u201900\u201d et sa plus grande d\u00e9clinaison bor\u00e9ale (+23\u00b026\u201918\u201d). Les jours sont les plus longs \u2013 l\u2019arc semi-diurne est maximal \u2013 dans l\u2019h\u00e9misph\u00e8re nord (16 h 31 m \u00e0 la latitude d\u2019Uccle). Le <\/span><\/span><\/span>Soleil<\/b><\/span><\/span><\/span> entre dans le <\/span><\/span><\/span>signe<\/i><\/span><\/span><\/span> du Cancer \u00e0 14 h 58 m alors qu\u2019il passe de la <\/span><\/span><\/span>constellation<\/i><\/span><\/span><\/span> du Taureau dans laquelle il se trouvait depuis le 14 mai dans la <\/span><\/span><\/span>constellation<\/i><\/span><\/span><\/span> des G\u00e9meaux aujourd\u2019hui<\/span><\/span><\/span><\/p>\n

La Lune et V\u00e9nus (-4,4) \u00e0 4\u00b0 l\u2019un de l\u2019autre \u2013 et Mars (+1,7) \u00e0 l\u2019est de V\u00e9nus \u2013 vers 21 h<\/span><\/span><\/span><\/p>\n

22 <\/b><\/span><\/span><\/span>La Lune \u00e0 l\u2019apog\u00e9e (\u00e0 405\u00a0385 km de la Terre \u2013 Diam\u00e8tre apparent\u00a0: 29\u201928\u201d) \u00e0 19 h<\/span><\/span><\/span><\/p>\n

La Lune \u00e0 4\u00b0 au nord de V\u00e9nus (-4,4) au-dessus de l\u2019horizon ouest \u00e0 21 h<\/span><\/span><\/span><\/p>\n

25<\/b><\/span><\/span><\/span> Plus tardif coucher de Soleil de l\u2019ann\u00e9e (20 h 00 m )<\/span><\/span><\/span><\/p>\n

26<\/b><\/span><\/span><\/span> Premier Quartier<\/b><\/span><\/span><\/span> de Lune \u00e0 7 h 50 m<\/span><\/span><\/span><\/p>\n

27<\/b><\/span><\/span><\/span> Mercure au p\u00e9rih\u00e9lie<\/span><\/span><\/span><\/p>\n

La Lune croissante 2\u00b0 au nord de l\u2019\u00e9toile Spica [Alpha Vir (+1,2)] \u00e0 20 h 30 m<\/span><\/span><\/span><\/p>\n

Visibilit\u00e9 des plan\u00e8tes<\/h3>\n

Visibles \u00e0 l\u2019\u0153il nu\u00a0: <\/b><\/span><\/span><\/span>V\u00e9nus, Mars, Jupiter, Saturne<\/span><\/span><\/span><\/p>\n

Difficiles \u00e0 observer\u00a0: <\/b><\/span><\/span><\/span>Neptune<\/span><\/span><\/span><\/p>\n

Inobservables\u00a0: <\/b><\/span><\/span><\/span>Mercure, Uranus<\/span><\/span><\/span><\/p>\n

Mercure <\/b><\/span><\/span><\/span>(+0,3\/-2,1), successivement dans les constellations du B\u00e9lier, du Taureau et des G\u00e9meaux passe au m\u00e9ridien le 1 \u00e0 10 h 03 m, le 15 \u00e0 10\u00a0h 30 m et le 30 \u00e0 11\u00a0h 43\u00a0m, d\u00e8s lors pratiquement non observable par suite de conditions d\u2019observation d\u00e9favorables <\/span><\/span><\/span><\/p>\n

V\u00e9nus<\/b><\/span><\/span><\/span> (-4,3\/-4,4), le soir successivement dans les constellations du Cancer et du Lion, en plus grande \u00e9longation le 4, se couche le 1 \u00e0 23 h 11\u00a0m, le 15 \u00e0 22\u00a0h 45\u00a0m et le 30 \u00e0 22 h 02 m <\/span><\/span><\/span><\/p>\n

Mars <\/b><\/span><\/span><\/span>(+1,6\/+1,7), avant et apr\u00e8s minuit successivement dans les constellations du Cancer et du Lion, se couche le 1 \u00e0 23\u00a0h 31 m, le 15 \u00e0 22 h 55 m et le 30 \u00e0 22\u00a0h 14\u00a0m (<\/span><\/span><\/span>\u00e0 ne pas manquer le 2\u00a0!<\/i><\/span><\/span><\/span>) <\/span><\/span><\/span><\/p>\n

Jupiter <\/b><\/span><\/span><\/span>(-2,1\/-2,2), le matin dans la constellation du B\u00e9lier, se l\u00e8ve le 1 \u00e0 2 h 09 m, le 15 \u00e0 1\u00a0h 20\u00a0m et le 30 \u00e0 0 h 28 m <\/span><\/span><\/span><\/p>\n

Saturne<\/b><\/span><\/span><\/span> (+0,9\/+0,8), le matin au d\u00e9but du mois puis apr\u00e8s minuit dans la constellation du Verseau, se l\u00e8ve le 1 \u00e0 0\u00a0h 33\u00a0m, le 15 \u00e0 23 h 33 m et le 30 \u00e0 22 h 33 m <\/span><\/span><\/span><\/p>\n

Uranus <\/b><\/span><\/span><\/span>(+5,8\/+5,8), passe au m\u00e9ridien le 1 \u00e0 10 h 17 m, le 15 \u00e0 9 h 21 m et le 30 \u00e0 8 h 26 m, d\u00e8s lors non observable <\/span><\/span><\/span><\/p>\n

Neptune <\/b><\/span><\/span><\/span>(+7,9\/+7,9), le matin au-dessus de l\u2019horizon est dans la constellation des Poissons, se l\u00e8ve le 1 \u00e0 1 h 05 m, le 15 \u00e0 0\u00a0h 09\u00a0m et le 30 \u00e0 23 h 07\u00a0m <\/span><\/span><\/span><\/p>\n

Pour en savoir plus :<\/i><\/strong>
\nAnnuaire 2023 de l\u2019Observatoire royal de Belgique<\/a> (En vente \u00e0 l\u2019Observatoire : EUR 13,00)<\/i>
\nEph\u00e9m\u00e9rides du mois dans la revue Ciel et Terre<\/i> de la Soci\u00e9t\u00e9 Royale belge d\u2019Astronomie, de M\u00e9t\u00e9orologie et de Physique du Globe SRBA (www.srba.be<\/a>)<\/i><\/p>\n","protected":false},"excerpt":{"rendered":"

AVIS IMPORTANT : Pour obtenir l\u2019heure officielle, ajouter DEUX heures aux heures indiqu\u00e9es ci-dessous (en Temps Universel UT pour Uccle) Ph\u00e9nom\u00e8nes c\u00e9lestes int\u00e9ressants 1 D\u00e9but de l\u2019\u00e9t\u00e9 m\u00e9t\u00e9orologique 2 Ce soir, Mars (+1,6) au beau milieu de l\u2019amas stellaire ouvert Praesepe (M44 ou NGC 2032) dans la constellation du Cancer (A observer \u00e0 l\u2019aide d\u2019une […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[51],"tags":[],"featured_image_src":{"landsacpe":false,"list":false,"medium":false,"full":false},"_links":{"self":[{"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/posts\/4003"}],"collection":[{"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/comments?post=4003"}],"version-history":[{"count":2,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/posts\/4003\/revisions"}],"predecessor-version":[{"id":4006,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/posts\/4003\/revisions\/4006"}],"wp:attachment":[{"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/media?parent=4003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/categories?post=4003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/robinfo.oma.be\/fr\/wp-json\/wp\/v2\/tags?post=4003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}