ASTRONOMICAL PHENOMENA - United States Navy

1 ASTRONOMICALPHENOMENAFOR THE YEAR2018 Prepared Jointly byThe Nautical Almanac OfficeUnited States Naval ObservatoryandHer Majesty s Nautical Almanac OfficeUnited Kingdom Hydrographic Government Printing Office2015 United STATESP rinted in the United States of Americaby the U. S. Government Printing Officeby permissionFor sale by Government Printing OfficeSuperintendent of DocumentsP. O. Box 979050St. Louis, MO 63197-9000phone: 1-202-512-1800order online at KINGDOMc Crown Copyright 2015 This publication is protected by international copyright law. All rights reserved. No part ofthis publication may be reproduced, stored in a retrieval system or transmitted in any form orby any means, electronic, mechanical, photocopying, recording or otherwise without the priorpermission of Her Majesty s Nautical Almanac Office, United Kingdom Hydrographic Office,Admiralty Way, Taunton, Somerset TA1 2DN, United following United States government work is excepted from the above notice, and nocopyright is claimed for it in the United States : cover, title page and reverse, pages 64-69,71-74, fromHM Nautical Almanac OfficeUK Hydrographic OfficeAdmiralty WayTauntonSomerset TA1 information: PHENOMENAFOR THE YEAR 2018 CONTENTSPagePhenomena: Seasons, Moon Phases.

2 4 Occultations, Perigee and Apogee of the ..5 Geocentric and Heliocentric Planetary ..6 Visibility of the ..7, 8 Times of Meridian Passages of the ..9 Elongations and Magnitudes of the ..10 Diary of Configurations of the Sun, Moon and ..12 Perihelion Passages of ..14 Chronological Cycles and Eras; Religious and Civil ..15 Gregorian Calendar and Julian Day ..16 Mean Sidereal ..17 Sun: Equation of Time and ..18 Circumpolar Stars: Positions ofPolarisand ..20 International Time ..22 Explanation of Rising and Setting ..23 Sunrise and Sunset ..24 Moonrise and Moonset ..64 Related ..78 Web ..80HA371/009/007/-01 : ASTRONOMICAL PHENOMENA , 2018 TEXaph18 2015 September 15 PLEASE REMOVEINTRODUCTORY NOTE4 The ASTRONOMICAL data in this booklet are expressed in the scale of universal time (UT); thisis also known as Greenwich mean time (GMT) and is the standard time of the Greenwichmeridian (0 of longitude).

3 A time in UT may be converted to local mean time by theaddition of east longitude (or subtraction of west longitude), where the longitude of the placeis expressed in time-measure at the rate of 1 hour for every 15 . The differences betweenstandard times and UT are indicated in the chart on page 22; local clock times may, however,differ from these standard times, especially in summer when clocks are often advanced by1 PHENOMENA OF SUN AND MOON, 2018 THE 3 20 16 ..Sept. 23 01 6 21 10 ..Dec. 21 22 23 PHASES OF THE MOONL unationNew MoonFirst QuarterFull MoonLast 02 22 02 22 13 15 541177 Feb. 15 21 05 Feb. 23 08 00 11 201178 Mar.

4 17 13 12 Mar. 24 15 35 Mar. 31 12 07 181179 Apr. 16 01 57 Apr. 22 21 46 Apr. 30 00 58 May8 02 091180 May 15 11 48 May 22 03 49 May 29 14 20 June6 18 321181 June 13 19 43 June 20 10 51 June 28 04 53 July6 07 511182 July13 02 48 July19 19 52 July27 20 18 181183 Aug. 11 09 58 Aug. 18 07 49 Aug. 26 11 02 18 01 Sept. 16 23 15 Sept. 25 02 09 03 18 16 16 16 02 Nov. 15 14 54 Nov. 23 05 39 Nov. 30 00 07 20 Dec. 15 11 49 Dec. 22 17 49 Dec. 29 09 34 ECLIPSESA total eclipse of the MoonJan. 31 North America except eastern part, Oceania,Russia, Asia, Middle East, northernScandanavia and eastern partial eclipse of the SunFeb.

5 15 Antarctica except Wilkes Land, southern partof South America and Falkland partial eclipse of the SunJul. 13 Tip of Wilkes Land in Antarctica, Tasmania,southernmost part of South Australia andStewart total eclipse of the MoonJul. 27 Antarctica, Australasia, Russia exceptnorthernmost part, Asia, Africa,Scandanavia, Europe, Central and EasternSouth partial eclipse of the SunAug. 11 Northernmost Canada, Greenland, Iceland,northernmost tip of the British Isles, mostof Scandanavia, Svalbard, most of Russia,most of Kazakhstan, most of Kyrgyzstan,Mongolia, most of ChinaFor further details see pages 64 77HA371/009/007/-01 : ASTRONOMICAL PHENOMENA , 2018 TEXaph18 2015 September 15 PLEASE REMOVELUNAR PHENOMENA , 20185 MOON AT PERIGEEMOON AT 22 May 17 21 22 Jan.

6 15 02 June2 17 Oct. 17 19 Jan. 30 10 June 15 00 Oct. 31 20 Feb. 11 14 June 30 03 Nov. 14 16 Feb. 27 15 July 13 08 Nov. 26 12 Mar. 11 09 July 27 06 Dec. 12 12 Mar. 26 17 Aug. 10 18 Dec. 24 06 Aug. 23 11 Apr. 20 15 Sept. 8 01 May 6 01 Sept. 20 01 OCCULTATIONS OF PLANETS AND BRIGHT STARS BY THE MOONDateBodyAreas of VisibilitydhJan. 05 08 RegulusAlaska, eastern tip of Russia, northern Canada, Greenland,Svalbard, Iceland, most of Europe, north westernmost AfricaJan. 12 04 VestaSouthern Africa, Madagascar, French Southern and AntarcticLands, Australia, TasmaniaJan. 27 11 AldebaranMost of India, Central Asia, most of China, Mongolia, most ofRussia, Alaska, North AmericaFeb.

7 01 19 RegulusScandanavia, northern Greenland, Svalbard, northern and easternRussia, China, Alaska, most of JapanFeb. 09 13 VestaChatham Island, most of AntarcticaFeb. 23 18 AldebaranBermuda, North America, Greenland, most of Europe,Svalbard, most of Russia, Kazakhstan, western Mongolia, ChinaMar. 01 tip of Russia, N. North America, Greenland, Svalbard, of Europe, AzoresMar. 22 Russia, North America, Greenland, Svalbard, most ofScandanavia, Great Britain and IrelandMar. 28 14 RegulusMost of Scandanavia, N. and eastern Russia, Svalbard, , north westernmost North America, Aleutian IslandsApr. 19 05 AldebaranMost of Uzbekistan, most of Kazakhstan, central and northernRussia, north and eastern Scandanavia, N.

8 Greenland,northernmost CanadaApr. 24 20 RegulusCentral Russia, tip of KazakhstanMay. 16 13 AldebaranCentral and northern Canada, Greenland, northernmostcentral RussiaJun. 27 09 VestaMicronesia, Kiribati, northern French Polynesia, southernMexico, Central America, Galapagos 10 AldebaranCentral and N. North America, most of Greenland, N. centralRussiaAug. 04 23 JunoE. Europe, W. Russia, Scandanavia, Greenland, extremenorthern CanadaAug. 06 19 AldebaranMongolia, Central Russia, Svalbard, most of Greenland,northernmost CanadaSep. 03 02 AldebaranGreenland, northernmost CanadaNov. 12 North America, S. Greenland, Iceland, Azores, most ofwestern EuropeNov. 16 04 MarsMost of Antartica, Falkland Islands, S.

9 South AmericaDec. 09 05 SaturnSouth eastern Russia, northern tip of ChinaDec. 10 China, E. Mongolia, Japan, E. and Russia, , Aleutian IslandsMaps showing the areas of visibility may be found on : ASTRONOMICAL PHENOMENA , 2018 TEXaph182015 September 15 PLEASE REMOVEPLANETARY PHENOMENA , 20186 GEOCENTRIC PHENOMENAMERCURY dhdhdhdhGreatest elongation West Jan. 1 20 (23 ) Apr. 29 18 (27 ) Aug. 26 21 (18 ) Dec. 15 12 (21 )Superior 17 12 June 6 02 Sept. 21 02 Greatest elongation EastMar. 15 15 (18 ) July 12 05 (26 ) Nov. 6 15 (23 ) ..Mar. 22 17 July 25 07 Nov. 17 05 Inferior 1 18 Aug. 9 02 Nov. 27 09 ..Apr. 14 04 Aug. 18 12 Dec. 6 20 VENUS dhdhSuperior 07 Inferior 26 14 Greatest elongation EastAug.

10 17 17 (46 ) ..Nov. 14 03 Greatest illuminated extent Sept. 21 10 Greatest illuminated extent Dec. 2 .. 3 20 16 ..Sept. 23 01 6 21 10 ..Dec. 21 22 23 SUPERIOR ..June 28 14 July 27 05 Aug. 28 10 .. 10 May9 01 July 11 04 Nov. 26 ..Apr. 18 02 June 27 10 .. 21 Oct. 24 01| 21 Apr. 18 ..June 19 18 Nov. 25 08| 14 The vertical bars indicate where the dates for the planet are not in chronological PHENOMENAA phelionPerihelionDescendingGreatestAscen dingGreatestNodeLat. SouthNodeLat. NorthMercury Jan. 25 Mar. 20 Apr. 23 June6 Apr. 13 May 13 June1 June 16 July 28 Sept. 12 Oct. 16 Nov. 23 May 15 Feb. 14 Apr.