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Small Astronomy Calendar for Amateur Astronomers Year III 2021 Let’s welcome our 2021 Small Astronomy Calendar Edition made by our Intergalactic Astronomy Educators Fellowship (IGAEF)’s team. In 2021, many amateur astronomers asked for calculations for more specific geographical locations. This year we added new useful calculated positions and coordinates for everyone in the world to use. You should check this calendar every month, specifically the lunar occultations pages for your observation point. There are many interesting and unique events that might not happen every year, because of the different parameters of the Moon orbit. Our hope is to fulfill your expectations. We would like to receive suggestions and feedback. You can find the editor’s email in the last page of the calendar. We appreciate your support and we are looking forward to having a good observational year, and a better and more complete calendar for this first year of a new decade. Index 3 - Calendar for 2021 4 – What is the Intergalactic Astronomy Educators Fellowship (IGAEF) 5 - Time Zones and Universal Time 6 - Phases of the Moon 2021 7 – Physical Ephemeris for the Moon 2021 10 - Local Time (EST) of MOONRISE 2021 11 - Local Time (EST) of MOONSET 2021 12 - Local time (EST) of planets rise and set 2021 15 - Diary of Astronomical Phenomena 2021 21 - Lunar eclipses 23 - Solar Eclipses 25 - Meteor Showers for 2021 26 – 2021 UPCOMING COMETS 27 - Satellites of Jupiter 2021 36 – Mutual Events of Jupiter Satellites 2021 39 - Julian Day Number, Apparent Sidereal Time, Obliquity of the Ecliptic, and UT of Solar transit 41 - Sun, Equinox of J2000 43 - Central Meridian of Mars, 2021 44 - Central Meridian of Jupiter, System I, 2021 45 - Central Meridian of Jupiter, System II, 2021 46 - Central Meridian of Saturn, System I, 2021 47 - Lunar Occultation predictions for Bill Sadowski Park, Miami, Florida, USA 69 - Lunar Occultation predictions for Fox Observatory, Broward, Florida, USA 103 - Lunar Occultation predictions for Marathon Key Airport, Florida, USA 125 - Lunar Occultation predictions for Coleman Science Works Theater, Tampa, Florida, USA 147 - Lunar Occultation predictions for Capitolio Nacional, Havana City, Cuba 169 - Lunar Occultation predictions for Teide Observatory, Canary Islands, Spain 187 - Lunar Occultation predictions for San Vicente, Colombia 211 - Lunar Occultation predictions for Museo de Astronomia El Meteorito, Mexico 233 - Lunar Occultation predictions for Ricardo Sanchez Observatory, Argentina 2 C A L E N D A R F O R 2021 January February March Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 1 2 3 4 5 6 1 2 3 4 5 6 3 4 5 6 7 8 9 7 8 9 10 11 12 13 7 8 9 10 11 12 13 10 11 12 13 14 15 16 14 15 16 17 18 19 20 14 15 16 17 18 19 20 17 18 19 20 21 22 23 21 22 23 24 25 26 27 21 22 23 24 25 26 27 24 25 26 27 28 29 30 28 28 29 30 31 31 April May June Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 1 1 2 3 4 5 4 5 6 7 8 9 10 2 3 4 5 6 7 8 6 7 8 9 10 11 12 11 12 13 14 15 16 17 9 10 11 12 13 14 15 13 14 15 16 17 18 19 18 19 20 21 22 23 24 16 17 18 19 20 21 22 20 21 22 23 24 25 26 25 26 27 28 29 30 23 24 25 26 27 28 29 27 28 29 30 30 31 July August September Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 3 1 2 3 4 5 6 7 1 2 3 4 4 5 6 7 8 9 10 8 9 10 11 12 13 14 5 6 7 8 9 10 11 11 12 13 14 15 16 17 15 16 17 18 19 20 21 12 13 14 15 16 17 18 18 19 20 21 22 23 24 22 23 24 25 26 27 28 19 20 21 22 23 24 25 25 26 27 28 29 30 31 29 30 31 26 27 28 29 30 October November December Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 1 2 1 2 3 4 5 6 1 2 3 4 3 4 5 6 7 8 9 7 8 9 10 11 12 13 5 6 7 8 9 10 11 10 11 12 13 14 15 16 14 15 16 17 18 19 20 12 13 14 15 16 17 18 17 18 19 20 21 22 23 21 22 23 24 25 26 27 19 20 21 22 23 24 25 24 25 26 27 28 29 30 28 29 30 26 27 28 29 30 31 31 Easter Sunday: 2021 Apr 04 3 What is the Intergalactic Astronomy Educators Fellowship (IGAEF)? Is the organization of people who like to promote, teach and disseminate astronomy, and is based in Miami. We like to invite whose research and educational interests lie within the broad spectrum of subjects comprising contemporary astronomy. Our mission is to support and share scientific understanding of the universe. The Intergalactic Astronomy Educators Fellowship is working hard to inspire, guide and support astronomy teachers, educators and enthusiasts of all walks of life. We will continuously work to provide projects (or links to projects that already exist) to teachers, educators, students and all who are interested in learning. We enjoy sharing the love of astronomy through our many activities and through every spoken word. We will work tirelessly to accomplish these goals through volunteers, partners, and donors. Our organization was established with the following goals in mind : • To better our world’s society through the knowledge and appreciation of astronomy. • To show and teach about our world and our universe through the astronomer’s views and perspectives. • To disseminate the latest news and discoveries about astronomy. • To promote observational activities. • To explain the roles of astronomy and astronautics advisers. • To better promote the connection between professionals, astronauts and engineers with those interested in astronomy and astronautics. • To empower the teaching of astronomy and to spread its world-changing benefits. • We will strive to accomplish our goals through all possible means, from using the latest knowledge data to providing a wide array of educational materials. • We will strive to better our world in the advancement of space science and exploration by implementing these aforementioned goals. • AND LASTLY, we pledge to teach and reinforce the practices of ethics, respect, and morality in an universal way, for the welfare of all of mankind. 4 Time Zones and Universal Time Fomr: https://eclipse.gsfc.nasa.gov/SEhelp/TimeZone.html Time can be measured in a number of ways. For instance, we can measure the passage of time via the orbital motion of Earth and other planets in the solar system (Dynamical Time). Or we can measure time based on the rotation of Earth on its axis with respect to the stars (Universal Time). Finally, we can measure time through the oscillations of atoms (International Atomic Time). Universal Time or UT is the precise measure of time used as the basis for all civil time-keeping. Although their exact definitions differ, most readers can assume that Universal Time is equivalent to Greenwich Mean Time or GMT. Universal Time is actually based on the mean sidereal time as measured in Greenwich, England. It's also approximately equal to mean solar time from Greenwich. Most astronomical calculations and predictions are usually presented in terms of Universal Time. In order to convert eclipse predictions from UT to local time, you need to know what time zone you are in. For North Americans, the conversion from UT to local time is as follows: Atlantic Standard Time (AST) = UT - 4 hours Eastern Standard Time (EST) = UT - 5 hours Central Standard Time (CST) = UT - 6 hours Mountain Standard Time (MST) = UT - 7 hours Pacific Standard Time (PST) = UT - 8 hours If Daylight Saving Time is in effect in the time zone, you must ADD one hour to the above standard times. For example, let's assume that an eclipse begins in Toledo, Ohio on June 20 at 20:25 UT. Toledo is in the Eastern Standard Time zone, so: Local Time = 20:25 - 5 hours = 15:25 (= 3:25 pm) But since Toledo observes Daylight Saving Time in June, we must ADD one more hour to the above time. So the eclipse will begin at 16:25 (=4:25pm) local time. Time zones for countries around the world can be determined with a special Time Zone Map courtesy of HM Nautical Almanac Office, Royal Greenwich Observatory. Just remember that you'll need to check with your travel agent or with a guide book to find out if Daylight Saving Time is practiced during that time of year. Coordinated Universal Time (or UTC) is based on atomic time. It is synchronized and adjusted to stay within 0.9 seconds of Universal Time (UT). Occasionally, a "leap second" is added to UTC in order keep it in sync with UT (which varies due to Earth's rotation). 5 Phases of the Moon 2021 New Moon First Quarter Full Moon Last Quarter d h d h d h ⊕dist d h Jan 6 9.6 Jan 13 5.1 Jan 20 21.1 Jan 28 19.3 (59.82) Feb 4 17.7 Feb 11 19.2 Feb 19 18.8 Feb 27 8.3 (58.11) Mar 6 1.5 We invite you to visit Mar 13 10.4 Mar 21 14.6 Mar 28 18.8 (56.79) Apr 4 10.1 our website Apr 12 2.5 Apr 20 6.9 Apr 27 3.5 (56.07) May 3 19.9 May 11 19.0 May 19 19.1 May 26 11.3 (56.05) Jun 2 7.5 Jun 10 10.9 Jun 18 3.9 Jun 24 18.7 (56.69) Jul 1 21.3 https://igaef.org/ Jul 10 1.3 Jul 17 10.2 Jul 24 2.7 (57.90) Jul 31 13.4 Aug 8 13.8 Aug 15 15.4 Aug 22 12.1 (59.46) Aug 30 7.3 Sep 7 0.8 Sep 13 20.7 Sep 20 23.9 (61.15) Sep 29 1.9 Oct 6 11.0 Oct 13 3.4 Oct 20 15.0 (62.62) Oct 28 20.1 Nov 4 21.3 Nov 11 12.9 Nov 19 9.0 (63.55) Nov 27 12.4 Dec 4 7.8 Dec 11 1.7 Dec 19 4.6 (63.64) Dec 27 2.4 Moon at Perigee 2021 d h d h d h d h Full of information, links Jan 9 15 Feb 3 20 Mar 2 6 Mar 30 6 and useful resources! Apr 27 15 May 26 1 Jun 23 10 Jul 21 10 Aug 17 9 Sep 11 10 Oct 8 18 Nov 5 23 Dec 4 10 Including pages dedicated to children, activities, Moon at Apogee 2021 decision makers, and much d h d h d h d h more! Jan 21 13 Feb 18 11 Mar 18 5 Apr 14 17 May 11 21 Jun 8 3 Jul 5 15 Aug 2 8 Aug 30 2 Sep 26 21 Oct 24 15 Nov 21 2 And you can help us with a Dec 18 2 donation from there! 6 Physical Ephemeris for the Moon 2021
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