{"id":50577,"date":"2026-01-26T00:53:48","date_gmt":"2026-01-25T23:53:48","guid":{"rendered":"https:\/\/kart.no\/produkt\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\/"},"modified":"2026-01-26T00:53:48","modified_gmt":"2026-01-25T23:53:48","slug":"celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant","status":"publish","type":"product","link":"https:\/\/kart.no\/en\/produkt\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\/","title":{"rendered":"Celestaire Extra Split Horizon Mirror &#8211; spare mirror for Astra sextant"},"content":{"rendered":"<p data-start=\"244\" data-end=\"518\"><strong data-start=\"244\" data-end=\"285\">The Celestaire Extra Split Horizon Mirror<\/strong> is a spare mirror for <strong data-start=\"309\" data-end=\"329\">Astra sextants<\/strong> used for <strong data-start=\"345\" data-end=\"371\">astronomical navigation<\/strong>. The mirror is a traditional split horizon mirror and fits models such as <strong data-start=\"462\" data-end=\"487\">Celestaire Astra IIIB<\/strong> and <strong data-start=\"491\" data-end=\"517\">Astra III Professional<\/strong>. <\/p>\n<p data-start=\"520\" data-end=\"799\">When <strong data-start=\"524\" data-end=\"551\">navigating with a sextant<\/strong>, the horizon mirror is an important optical component. In a maritime environment, mirrors can be affected by moisture, salt and wear over time, and it may therefore be necessary to replace the mirror to maintain optimal optical quality and precision in the instrument. <\/p>\n<p data-start=\"801\" data-end=\"993\">This spare mirror makes it easy to replace a worn or damaged mirror on the sextant. The mirror comes pre-assembled in a frame and can be replaced quickly using the fixing screws on the instrument. <\/p>\n<p data-start=\"995\" data-end=\"1369\">Split Horizon Mirror is the <strong data-start=\"1023\" data-end=\"1055\">traditional mirror solution<\/strong> used on most classic sextants. One half of the mirror is reflective, while the other half is clear glass so that the horizon is seen directly through the mirror. Many experienced navigators prefer this solution because it provides a natural and precise image of the horizon during observations.  <\/p>\n<p data-start=\"1371\" data-end=\"1501\">The mirror can also be used if you want to <strong data-start=\"1415\" data-end=\"1500\">convert a sextant from a Whole Horizon mirror to a traditional Split Horizon mirror<\/strong>.<\/p>\n<p data-start=\"1503\" data-end=\"1666\">This is a practical spare parts and maintenance product for sailors and navigators who use <strong data-start=\"1598\" data-end=\"1622\">a sextant for sailing<\/strong> and want to keep the instrument in good condition.<\/p>\n<p data-start=\"1668\" data-end=\"1864\"><strong data-start=\"1668\" data-end=\"1702\">The navigation store Kart.no AS<\/strong> is a distributor of Celestaire in Norway. For schools, courses and institutions, we can also deliver larger batches of sextants &#8211; please contact us for price and delivery time.<\/p>\n<hr data-start=\"1866\" data-end=\"1869\">\n<h3 data-section-id=\"1c00fie\" data-start=\"1871\" data-end=\"1887\">SEO title<\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Celestaire Extra Split Horizon Mirror is a spare mirror for Astra extras. Traditional split horizon mirror that fits Astra IIIB and Astra III. <\/p>\n","protected":false},"featured_media":42025,"comment_status":"open","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":""},"product_brand":[1380],"product_cat":[1099],"product_tag":[],"class_list":["post-50577","product","type-product","status-publish","has-post-thumbnail","product_brand-celestaire","product_cat-spare-parts-for-sextants","product_shipping_class-boxship","pa_produsent-celestaire","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"composite_virtual":false,"composite_layout":"","composite_add_to_cart_form_location":"","composite_editable_in_cart":false,"composite_sold_individually_context":"","composite_shop_price_calc":"","composite_components":[],"composite_scenarios":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Celestaire Split Horizon Mirror for Astra sextant<\/title>\n<meta name=\"description\" content=\"Celestaire Extra Split Horizon Mirror spare mirror for Astra IIIB and Astra III sextant. Traditional split horizon mirror for astronomical navigation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kart.no\/en\/produkt\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Celestaire Extra Split Horizon Mirror - spare mirror for Astra sextant\" \/>\n<meta property=\"og:description\" content=\"Celestaire Extra Split Horizon Mirror spare mirror for Astra IIIB and Astra III sextant. Traditional split horizon mirror for astronomical navigation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kart.no\/en\/produkt\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\/\" \/>\n<meta property=\"og:site_name\" content=\"Kart.no\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/kart.no\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kart.no\/wp-content\/uploads\/2026\/01\/Celestaire-Extra-Split-Horizon-Mirror.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"582\" \/>\n\t<meta property=\"og:image:height\" content=\"582\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\\\/\",\"url\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\\\/\",\"name\":\"Celestaire Split Horizon Mirror for Astra sextant\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/kart.no\\\/en\\\/produkt\\\/celestaire-extra-split-horizon-mirror-spare-mirror-for-astra-sextant\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kart.no\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Celestaire-Extra-Split-Horizon-Mirror.jpg\",\"datePublished\":\"2026-01-25T23:53:48+00:00\",\"description\":\"Celestaire Extra Split Horizon Mirror spare mirror for Astra IIIB and Astra III sextant. 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