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An Open Invitation
For amateur radio operators and scanner enthusiasts, when in the Denver metro area, please join the Colorado Astronomy Net on the Rocky Mountain Radio League's 146.94 MHz and 449.825 MHz repeaters. The RMRL 146.94 repeater is also linked with the WB0WDF Cripple Creek 447.400 MHz repeater and Allstar nodes 28298, 28299 and 29436. We are also linked via Echolink, links are k0jsc-r and canoncty. More information on the WB0WDF repeater links and Allstar nodes and Echolinks can be found at k0jsc.com. The net meets on Tuesday nights at 7 P.M. Mountain Time (US).
Interested in obtaining your Amateur Radio (Ham) License or your General Radio Operator's Licence (GROL)? Visit the South Metro VE Team website for more information. The South Metro VE Team provides test sessions on the 1st Saturday of each month at our new Eagle Street Facility, The City of Centennial, 7272 South Eagle Street, Centennial, Colorado 80112-4244 from 9am until 1pm.
The Colorado Astronomy Net is now on Facebook.
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Excerpts from JPL mission updates are provided as a public service as part
of the JPL Solar System Ambassador/NASA Outreach program.
For special JPL programs and presentations in your area visit the JPL Solar System Ambassador website.
(Click on the logo to link to the JPL SSA homepage.)
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In this Newsletter...
Background screen credits: NGC5775
Imaged March 21/22, 2001
using the 16" Kitt Peak Visitors Center telescope
as part of the
Kitt Peak Advanced Observing Program.
Solar Eclipse 2017
August 21, 2017
Links and Information
The Month At-A-Glance
A calendar displaying the daily astronomical events.
Phases
- First Quarter Moon occurs on the 3rd.
- Full Moon occurs on the 11th.
- Last Quarter Moon occurs on the 19th.
- New Moon occurs on the 26th.
Apogee/Perigee
- The Moon is at Apogee on the 15th, 251,950 miles from Earth.
- The Moon is at Perigee on the 27th, 223,275 miles from Earth.
Moon/Planet Pairs
- The Moon passes 0.3° north of Aldebaran on the 1st.
- The Moon passes 0.7° south of Regulus on the 7th.
- The Moon passes 2° north of Jupiter on the 10th.
- The Moon passes 3° north of Saturn on the 16th.
- The Moon passes 0.2° south of Neptune on the 22nd.
- The Moon passes 5° south of Venus on the 23rd.
- The Moon passes 0.8° north of asteroid Pallas on the 24th.
- The Moon passes 6° south of Mars on the 28th.
- The Moon passes 0.5° north of Aldebaran on the 28th.
For reference: The Full Moon subtends an angle of ~0.5°.
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Planetary Reports generated by "TheSky" software. These reports provide predicted data for the planets for the first of each month for the current year. The rise and set times for the Sun and the Moon for each day of the month as well as meteor shower radiants are also included in the reports. These reports have been optimized for the Denver, Colorado location, however, the times will be approximate for other locations on Earth.
(All times are local unless otherwise noted.)
Planetary Highlights for April
"Mercury, Mars, and the Moon will delight evening observers in early April. The three create a fine prelude for the month’s "star" performer, Jupiter. The solar system's largest planet reaches peak visibility in April and remains visible throughout the night. As Jupiter dips low in the west before dawn, early risers can enjoy nice views of ringed Saturn in the south while brilliant Venus dominates the east." Astronomy Magazine, April 2017, p. 36. |
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Mercury
Is at greatest eastern elongation (19° to the west of the Sun) on the 1st. Mercury is stationary on the 9th. Mercury is in inferior conjunction on the 20th. Look for Mercury in the west just after sunset during the first week of April. After that, Mercury will be a bit more difficult to spot until it swings into the morning sky during the last week of the month. Mercury sets at 9:03 p.m. on the 1st. Mercury rises at 5:24 a.m. on the 30th. Mercury moves from the constellation of Aries into Pisces this month shining at magnitude -0.2 on the 1st. |
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Venus
Is stationary on the 12th. Venus is at greatest brilliancy (magnitude -4.7) on the 29th. Venus rises at 5:44 a.m. on the 1st and about 4:17 a.m. by month's end. Look for Venus in the early morning towards the east before sunrise. Venus is in the constellation of Pisces shining at magnitude -4.7 on the 15th. |
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Earth
N/A. |
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Mars
Sets at 10:15 p.m. on the 1st and about 10:03 p.m. by month's end. Look for Mars about 30 minutes or so after sunset to the west. Mars moves from the constellation of Aries into Taurus shining at magnitude 1.5. |
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Jupiter
Is at opposition on the 7th, rising as the Sun sets. On this day, Jupiter peaks at magnitude -2.5. Jupiter rises at 7:47 p.m. on the 1st and about 5:31 p.m. by month's end. Look for Jupiter in the evening to the east and follow Jupiter across the night sky into early morning to the west before sunrise. Jupiter is in the constellation of Virgo shining at magnitude -2.5. |
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Saturn
Is stationary on the 6th. Saturn rises at 1:26 a.m. on the 1st and about 11:22 p.m. by month's end. Saturn is visible in the early morning sky before sunrise to the southeast. Saturn is in the constellation of Sagittarius shining at magnitude 0.3. |
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Uranus
Is in conjunction with the Sun on the 14th. Uranus sets at 8:18 p.m. on the 1st and about 6:29 p.m. by month's end. Uranus is lost in the evening and morning twilight glow this month and is not visible this month. Uranus is in the constellation of Pisces shining at magnitude 5.9. |
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Neptune
Neptune will be returning to the morning skies at the end of the month but will only be several degrees above the eastern horizon in the dawn twilight and difficult to spot. Neptune is in the constellation of Aquarius shining at magnitude 7.9. |
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Dwarf Planets |
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Ceres
Sets at 11:20 p.m. on the 1st and about 10:23 p.m. by month's end. Ceres is visible in the early evening this month. Ceres moves from the constellation of Aries into Taurus shining at magnitude 9.0. |
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Pluto
Is stationary on the 20th. Pluto rises at 2:54 a.m. on the 1st and about 12:56 a.m. by month's end. Pluto is visible in the early morning skies before sunrise. Pluto is in the constellation of Sagittarius shining at magnitude 14.2.
As always, good luck at spotting Neptune, Ceres and Pluto, a large telescope and dark skies will be needed. |
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Meteor Showers
The Lyrids [meteor showers] are typically visible between April 16 and 25. Maximum occurs during April 21-22. Although the maximum rate is about 10, there have been instances during the last 200 years when rates were near or over 100 per hour. The average magnitude of the meteors is near 2.4 and the speed is described as rapid. About 15% of the meteors leave persistent trains.
Meteor Shower Radiant Report
For more information about Meteor Showers, visit Gary Kronk's
Meteor Showers Online web page.
Meteor Scatter (or Meteor burst communications) - "is a radio propagation mode that exploits the ionized trails of meteors during atmospheric entry to establish brief communications paths between radio stations up to 2,250 kilometres (1,400 mi) apart." Tune your shortwave or your HF amateur radio to 54.310 MHz SSB and see if you can hear any pings. |
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Comets
Comet 41P/Tuttle-Giacobini-Kresak could possibly reach 5th magnitude this month as it passes through the constellation of Draco the Dragon between Ursa Major and Ursa Minor. For northern observers, this region of sky is visible all night long. Comet 41 passes closest to Earth on the 1st and closest to the Sun on the 13th. However, predictions about comet brightness can be "should I say it?" unpredictable :). Conservative predictions are around 8th magnitude and optimistic predictions are around 5th magnitude. Use binoculars to find the comet and then if you are under dark skies, try to see if you can spot Comet 41 with your unaided eyes. The best views will be during the first week in the morning skies before dawn and during the last two weeks of the month in the evening skies when the Moon is not present.
Comet Johnson (C/2015 V2) is in the constellation of Hercules north of Corona Borealis.
Comet PANSTARRS (C/2015 ER61) passes from the constellation of Capricornus east through Aquarius.
For information, orbital elements and ephemerides on observable comets, visit the
Observable Comets page from the Harvard-Smithsonian Center for Astrophysics.
For more information about Comets, visit Gary Kronk's
Cometography.com webpage. |
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Eclipses
Solar Eclipses
No solar eclipse activity this month.
Lunar Eclipses
No lunar eclipse activity this month.
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Observational Opportunities
Observe Mercury and Mars in the early evening after sunset.
Enjoy Jupiter all night long.
Look for Saturn morning skies before sunrise.
Try to spot Comet 41P/Tuttle-Giacobini-Kresak in Draco.
Try to spot some of the Lyrid meteors after mid-month.
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Asteroids
(From west to east)
- Vesta is in the constellation of Gemini.
- Irene, Psyche and Amphitrite are in the constellation of Leo.
- Information about the Minor Planets can be found at
the Minor Planet
Observer website.
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Ocultations
Information on various
occultations can be
found by clicking the IOTA logo. |
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I have created a web page containing images taken and submitted by subscribers to the email newsletter, check-ins to the Colorado Astronomy Net and readers of the online newsletter. Any one wishing to submit their own images to the gallery, please let me know. The images must be taken by the submitter and be astronomy related. Please include a description and your information so that I can give proper credit to your work.
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This is a new section where I will post meteor, fireball, etc sightings that have been published on the American Meteor Society's web site. I want to make this an active section of the web pages and newsletter and would like to publish the links to member sightings. If you have any published sightings, please provide me with the links and I will post them here for all to enjoy.
Event ID |
Date/Time |
Location |
Observer |
Link |
3587-2015 |
2015-11-22 17:38 MST |
CO |
Kevin S |
3587aw |
3829-2015 |
2015-12-05 18:06 MST |
Highlands Ranch, CO |
Burness A |
3829a |
3871-2015 |
2015-11-13 01:55 MST |
CO |
Charles N |
3871a |
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(Excerpts from recent JPL mission updates)
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Mars website mobile version is here!
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(If you have a link you would like to recommend to our readers, please feel free to submit it.)
- Brighton Astronomy Group - Astronomy in Brighton, Colorado (under construction).
- Cloudbait Observatory, Guffey Colorado - Submit your fireball reports here. Interesting, knowledgeable site.
- Colorado Amateur Satellite Net - On our net, we discuss anything that has to do with amateur satellites, ham radio with the space station, and more.
- Colorado Springs Astronomical Society - The Colorado Springs Astronomical Society (CSAS) is a nonprofit organization dedicated to the enjoyment of the nighttime sky.
- Denver Astronomical Society - Promotes the enjoyment and understanding of astronomical phenomena, history and lore by providing educational and observing opportunities for our members, general public, and outreach activities at the University of Denver's historic Chamberlin Observatory, schools, and nature centers.
- Gateway2Space - More information about the Star Light -- Star Bright Observatory.
- Little Thompson Observatory - The Little Thompson Observatory (LTO) offers no-charge public access to the wonders of the night sky, either on one of our regularly scheduled public nights, or as a private group affair. When the weather co-operates, each session includes a guided tour of the sky using our large (18") telescope.
- Mike Coletta's SatWatch - Orbiting object and satellite watching. ORBITING OBJECT TRACKING … It's the thrill of the chase. Promoting and supporting the hobby of amateur radio, Mike - KG0UFO, along with many other radio hobbyists around the globe use the reflected signals of the AF Space Fence to detect orbiting objects as they make their way over the US. - The AF Space Fence was shut down in Sept. 2013. These are recordings of Mike's many observations.
- National Space Science & Technology Institute - NSSTI runs the Star Light--Star Bright Observatory in Colorado Springs, Colorado.
- Northern Colorado Astronomical Society - The purpose of our organization is to encourage the understanding & interest in the science & hobby of astronomy.
- Rocky Mountain Star Stare - The Premier Star Party in The Rocky Mountains
- Sangre Stargazers - New astronomy club in the Wet Mountain Valley of Custer County (about 45 miles due west of Pueblo, CO.)
- Southern Colorado Astronomical Society - The Southern Colorado Astronomical Society, CSU-P and the Pueblo Nature and Raptor Center welcomes everyone to participate in the discovery of our night sky.
- Star Cruiser Bill's Astrophotography - Great astrophotography from Aurora Colorado.
- HighQ Software Group - Blog of Ralph Boyd, Software engineer, amateur radio operator, radio astronomer.
- Radio Astronomy News - Radio Astronomy news and information.
- Radio Astronomy Research Posts - Radio Astronomy Research news posts and observations.
- Radio Astronomy Supplies - Radio Astronomy Supplies, the International leader in research radio telescopes for universities, observatories and individual.
- Radio JOVE Project - Radio JOVE students and amateur scientists observe and analyze natural radio emissions of Jupiter, the Sun, and our galaxy.
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Society of Amateur Radio Astronomers - The Society of Amateur Radio Astronomers (SARA) is an international society of dedicated enthusiasts who teach, learn, trade technical information, and do their own observations of the radio sky.
- A Guide to the Galaxy Right from our Bedroom Window - An interesting site suggested by the students from Lexington Middle School Science Club in Nebraska. Lots of good basic astronomy information.
- A Kid's Guide to Astronomy - A great site with other links to learn about stars and astronomy for kids of all ages.
- "TheSky" - Astronomy Software by Software Bisque.
- A Sea of Stars - Voyages of a Merchant Mariner & Amateur Astronomer - I'm a retired Navy veteran, currently sailing with the US Navy's Military Sealift Command as an Operations Chief. My dominant interests are science (esp. astronomy), history and photography, and I enjoy naval and military wargaming WHEN I can find the time.
- A Short Guide to Celestial Navigation - Celestial navigation is the art and science of finding one's geographic position by means of astronomical observations, particularly by measuring altitudes of celestial objects — sun, moon, planets, or stars.
- The ARRL - Amateur Radio Relay League - Information about amateur radio and how to become an amateur radio operator.
- American Meteor Society - Provides amateur observers a place to learn about and report meteor, fireball and related sightings.
- Astrogirl Homepage - Family-friendly educational astronomy website.
- Astronomia - Online web applications that use catalogues of astronomical objects. Applications and their description are also prepared in English.
- Astronomy Picture of the Day - A different picture of the cosmos every day.
- Astronomy 2009
- This site has some good links a young, interested student wishes to share.
- Be an Astronomer right from your Window - At-home astronomy techniques.
- Black Hole Encyclopedia - Excellent site from StarDate - University of Texas McDonald Observatory
- Caelum Observatory - The LARGEST dedicated public telescope in the Southwest at the Mount Lemmon SkyCenter!
- Celestial Bodies and Astronomy.
- Celestron Telescopes - Celestron telescopes.
- Clear Skies Observing Guides - CSOG, short for Clear Skies Observing Guides is a new concept in visual amateur astronomy. It is a digital publication that will enable observers to target all deepsky objects and carbon stars within reach of their equipment.
- The Constellations and Their Stars - Good site for finding out more about the 88 constellations and their associated stars.
- CosmoQuest - The place where you map other worlds, explore out universe and contribute to science.
- Distant Suns - Desktop Astronomy package for PCs.
- EarthSky - Astronomy news.
- Groovy Adventures - Unique adventures and vacations including astronomy related vacations.
- Heavens-Above - As the name implies - What's up in the heavens, particularly satellite passes.
- The International Dark-Sky Association - To preserve and protect the nighttime environment and our heritage of dark skies.
- informED: 10 Teaching Tools for Educators - informED - Teacher Resources.
- iTelescope.net - iTelescope.Net is the world's premier network of Internet connected telescopes, allowing members to take astronomical images of the night sky for the purposes of education, scientific research and astrophotography.
- JPL Solar System Ambassador Program - "Volunteers Bringing the Solar System to the Public"
- JPL Solar System - Jet Propulsion Laboratory information on our solar system.
- K8JTK.ORG - Welcome to the home page of Jeffrey Kopcak. You will find pages and posts I wrote about my hobbies, interests, projects, and things I’m involved in.
- Kids Space Center - Telescopes and Astronomy - Another site suggested by a young student - Great info about telescopes.
- Mars Exploration, Mars Rovers Information, Facts, News, Photos - National Geographic - Mars Exploration - Investigating the Red Planet.
- Meade Advanced Products Users Group - Mapug-Astronomy Topical Archive & information resource, containing a massive 335 page archive of discussions about Meade equipment, and much more: observatories, observing lists, permanent piers, equatorial wedges, remote operations, software, eyepieces, etc.
- My Stars Live - Interactive Star Chart
- NASA - Lunar and Planetary Science - General information, Missions to Comets, Data, Press Releases, Meteors and Meteorites, Other topics of Interest.
- NASA Science News - NASA missions, updates, astronomy news, excellent resource.
- National Archives info on space exploration - Archives Library Information Center (ALIC) - Space Exploration - Information about the United States' space flight programs, including NASA missions and the astronauts who participate in the efforts to explore space.
- Predictions for Solar and Lunar Eclipses - A website dedicated to predictions and information on eclipses of the Sun and Moon.
- Skymaps.com - Free sky maps each month.
- Skywatch Sightings from NASA - This site gives you the best times to watch the ISS pass over or near your location.
- Space.com - Interesting space and astronomy articles.
- Spaceflight Now - Launches and satellite news.
- SpaceLinks/Space Careers - SPACELINKS is a specialist staffing consultancy sourcing and supplying high caliber professionals for a wide range of world class organizations in the Space and Defense industry.
- "SpaceRef.com" - SpaceRef's 21 news and reference web sites are designed to allow both the novice and specialist alike to explore outer space and Earth observation.
- Space Weather - Check out what the sun is doing as seen from space.
- Stellarium - Free, downloadable planetarium/astronomy software.
- UniverseToday - Short, interesting articles about space and related topics.
- Wikisky - WIKISKY is a non-commercial project. The main purpose of WIKISKY is to consolidate astronomical, astrophysical and other information about different space objects and astrophysical facts.
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Definitions of astronomical terms.
Many of the astronomical terms used in this newsletter are defined here.
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The author will accept any suggestions, constructive criticisms, and corrections. Please feel free to send me any new links or articles to share as well. I will try to accommodate any reasonable requests. Please feel free to send questions, comments, criticisms, or donations to the email address listed below. Enjoy!