Astronomy News for the Month of August 2021


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 Excerpts from JPL mission updates are provided as a public service as part
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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.



The Month At-A-Glance
A calendar displaying the daily astronomical events.


18 day moon

The Moon

Phases

Apogee/Perigee

Moon/Planet Pairs

For reference: The Full Moon subtends an angle of ~0.5°.

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The Planets & Dwarf Planets

Planetary Reports generated by "TheSkyX" 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 August

"On early August evenings you'll find three rocky planets in the sky: Venus, Mars and Mercury. Venus is easy to spot, so use it as a guide to find the other two, which are more challenging in twilight. Overnight there's a planet spectacular starring Saturn and Jupiter, both of which reach opposition this month. Jupiter provides some unique satellite events not to be missed if you have a telescope. Binocular viewers can track down distant giants Uranus and Neptune in the morning sky." Astronomy Magazine, August 2021, P. 32.

Mercury

Is in superior conjunction on the 1st. Mercury has returned to the evening sky. Mercury sets at 8:21 p.m. on the 1st and about 8:22 p.m. by month's end. Look for Mercury to the west about 30 minutes after sunset after the first week of the month. On the 18th, look for Mercury and Mars passing within 0.08° of each other. Mercury moves from the constellation of Cancer into Virgo shining at magnitude -0.1 on the 31st.

Venus

Sets at 9:45 p.m. on the 1st and about 9:03 p.m. by month's end. Look for Venus in the west soon after sunset. Venus moves from the constellation of Leo into Virgo shining at magnitude -4.0 on the 15th.

Earth

N/A.

Mars

Sets at 9:17 p.m. on the 1st and about 8:02 p.m. by month's end. Look for Mars very low to the west about 30 minutes after sunset. Mars is in the constellation of Leo shining at magnitude 1.8.

Jupiter

Is at opposition on the 19th, rising as the Sun sets. Jupiter rises at 9:04 p.m. on the 1st and about 6:52 p.m. by month's end. Jupiter is at its best viewing for the year and is visible all night long. Jupiter is in the constellation of Aquarius shining at magnitude -2.9.

Saturn

Is at opposition on the 2nd, rising as the Sun sets. Saturn rises at 8:09 p.m. on the 1st and about 6:00 p.m. by month's end. Along with Jupiter, Saturn is at its best viewing for the year and is visible all night long. Saturn is in the constellation of Capricornus shining at magnitude 0.2.

Uranus

Rises at 12:12 a.m. on the 1st and around 10:06 p.m. by month's end. Uranus is returning to the evening sky this month, but is still best observed after midnight. Look to the south before sunrise to spot Uranus. Uranus is in the constellation of Aries shining at magnitude 5.8.

Neptune

Rises at 10:02 p.m. on the 1st and about 7:58 p.m. by month's end. Look for Neptune in the late evening and early morning hours before sunrise. Follow Neptune across the sky in the constellation of Aquarius shining at magnitude 7.7.

Dwarf Planets

Ceres

Rises at 1:27 a.m. on the 1st and about 11:48 p.m. by month's end. Look to the south to spot Ceres before sunrise. Ceres is in the constellation of Taurus shining at magnitude 8.9.

Pluto

Rises at 7:23 p.m. on the 1st and about 5:19 p.m. by month's end. Pluto is visible almost all night long under the right conditions. Pluto is in the constellation of Sagittarius shining at magnitude 15.0.

As always, good luck at spotting Neptune, Ceres and Pluto, a large telescope and dark skies will be needed.

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Astronomical Events

Meteor Showers

  • The Northern Delta Aquarids [meteor shower] extends from July 16 to September 10. Maximum occurs on August 13. The hourly rates reach a high of 10.

  • The Perseids meteor shower is generally visible between July 23 and August 22. Maximum occurs during August 12/13. The hourly rate typically reaches 80, although some years have been as low as 4 and as high as 200. The meteors tend to be very fast, possess an average magnitude of 2.3 and 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. Try other frequencies as well... 6m FT8 digital - 50.313 Mhz & 50.276 Mhz, JP-65 digital mode and the carrier frequencies of the lower VHF bands for TV channels 2, 3 & 4.

    Meteor Rx How-To by Terry Bullett (WØASP)

  • Comets

    "The closer on a short summer's night should be Comet 4P/Faye. A 6-inch scope under country skies will pick up the 10th-magnitude fuzz approaching the midpoint of the Pleiades and Hyades star clusters in Taurus.

    You may not see it at first with low power, so try about 100x. The stubby, ill-defined tail drifts out of the eyepiece, followed by the sharper flank, which faces the solar wind. Compare it to globular star cluster M72 in Aquarius." Astronomy Magazine, August 2021, p. 38.

  • 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.

  • Eclipses

    Solar Eclipses

  • No solar eclipse activity this month.

    Lunar Eclipses

  • No lunar eclipse activity this month.

  • Observational Opportunities

  • Look for Mercury, Venus and Mars in the evening.
  • Look for Saturn and Jupiter in the evening and after midnight.
  • Look for Neptune and Uranus in the late evening and early morning.
  • Enjoy one of the best meteor showers of the year. The Perseids Meteor shower can be viewed for several weeks in August, peaking on the morning of the 12/13.

  • Asteroids

    (From west to east)
    Ocultations

    IOTA Logo

  • Information on various occultations can be found by clicking the IOTA logo.
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    Subscriber Gallery

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    Member Meteor Sightings

    In this section 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 CO Burness A 3829a
    3871-2015 2015-11-13 01:55 MST CO Charles N 3871a
    986-2020 2020-02-21 22:20 MST CO Lukas S 986
    3716-2020 2020-07-24 23:22 MST CO Lukas S 3716

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    Planetary/Lunar Exploration Missions

    (Excerpts from recent JPL mission updates)

    JPL Latest News
    The Latest from Space

    JPL Latest News

    July 23, 2021
    NASA Awards Launch Services Contract for the Europa Clipper Mission

    Full Article & Images

    "The mission will explore whether Jupiter's moon Europa has conditions suitable for life.

    NASA has selected Space Exploration Technologies Corp. (SpaceX) of Hawthorne, California, to provide launch services for Earth's first mission to conduct detailed investigations of Jupiter's moon Europa.

    The Europa Clipper mission will launch in October 2024 on a Falcon Heavy rocket from Launch Complex 39A at NASA's Kennedy Space Center in Florida. The total contract award amount for launch services is approximately $178 million."

    Read the latest news and discoveries from JPL's dozens of active space missions exploring Earth, the solar system and worlds beyond.

    Past, Present, Future and Proposed JPL Missions.

    For special JPL programs and presentations in your area visit the JPL Solar System Ambassador web site.

    Juno - July 15, 2021
    NASA's Juno Tunes into Jovian Radio Triggered by Jupiter's Volcanic Moon Io

    Full Article & Images

    "By listening to the rain of electrons flowing onto Jupiter from its intensely volcanic moon Io, researchers using NASA's Juno spacecraft have found what triggers the powerful radio emissions within the monster planet's gigantic magnetic field. The new result sheds light on the behavior of the enormous magnetic fields generated by gas-giant planets like Jupiter.

    Jupiter has the largest, most powerful magnetic field of all the planets in our solar system, with a strength at its source about 20,000 times stronger than Earth's. It is buffeted by the solar wind, a stream of electrically charged particles and magnetic fields constantly blowing from the Sun. Depending on how hard the solar wind blows, Jupiter's magnetic field can extend outward as much as two million miles (3.2 million kilometers) toward the Sun and stretch more than 600 million miles (over 965 million kilometers) away from the Sun, as far as Saturn's orbit. Jupiter has several large moons that orbit within its massive magnetic field, with Io being the closest. Io is caught in a gravitational tug-of-war between Jupiter and the neighboring two of these other large moons, which generates internal heat that powers hundreds of volcanic eruptions across its surface."

    Images from NASA's JunoCam.

    More information on the Juno mission is available at: Juno and Mission Juno.

    The public can follow the Juno mission on Facebook and Twitter.

    New Horizons - July 14, 2021
    Great Exploration Revisited: New Horizons at Pluto and Charon

    Full Article & Images

    "Six years ago today, NASA's New Horizons spacecraft made history with the first up-close exploration of the Pluto system — providing breathtaking views and detailed data on Pluto and its largest moon, Charon, revealing the surfaces of these distant, mysterious worlds at the outer reaches of our solar system.

    These simulated flights over Pluto and Charon include some of the sharpest images and topographic data that New Horizons gathered during its historic flyby on July 14, 2015. These are the first "movies" of Pluto and Charon made from the highest-resolution black-and-white image strips, taken by New Horizons' Long Range Reconnaissance Imager (LORRI), as the spacecraft zipped by at more than 30,000 miles per hour."

    New Horizons gallery

    Find New Horizons in the iTunes App Store.

    For more information on the New Horizons mission - the first mission to the ninth planet - visit the New Horizons home page.

    TESS - July 12, 2021
    NASA's TESS Discovers Stellar Siblings Host 'Teenage' Exoplanets

    Full Article & Images

    "Thanks to data from NASA's Transiting Exoplanet Survey Satellite (TESS), an international collaboration of astronomers has identified four exoplanets, worlds beyond our solar system, orbiting a pair of related young stars called TOI 2076 and TOI 1807.

    These worlds may provide scientists with a glimpse of a little-understood stage of planetary evolution.

    "The planets in both systems are in a transitional, or teenage, phase of their life cycle," said Christina Hedges, an astronomer at the Bay Area Environmental Research Institute in Moffett Field and NASA's Ames Research Center in Silicon Valley, both in California. "They're not newborns, but they're also not settled down. Learning more about planets in this teen stage will ultimately help us understand older planets in other systems."

    For more information on the TESS mission, visit the Latest Tess Stories page.

    Past, Present, Future and Proposed JPL Missions

    Visit JPL's mission pages for current status.

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    Mars Missions

    Be A Martian

    Mars website mobile version is here!

    MARS WEATHER
    Mars Daily Weather Report

    Mars on the Go! NASA Be A Martian Mobile App
    If you want the latest news as it happens, try our Be A Martian app.
    Download on Mobile Devices
    Android | iPhone | Windows Phone
    JMARS

    JMARS is an acronym that stands for Java Mission-planning and Analysis for Remote Sensing. It is a geospatial information system (GIS) developed by ASU's Mars Space Flight Facility to provide mission planning and data-analysis tools to NASA's orbiters, instrument team members, students of all ages, and the general public.

    Laboratory for Atmospheric and Space Physics

    "The Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado Boulder (CU) began in 1948, a decade before NASA. We are the world's only research institute to have sent instruments to all eight planets and Pluto.

    LASP combines all aspects of space exploration through our expertise in science, engineering, mission operations, and scientific data analysis. As part of CU, LASP also works to educate and train the next generation of space scientists, engineers and mission operators by integrating undergraduate and graduate students into working teams. Our students take their unique experiences with them into government or industry, or remain in academia to continue the cycle of exploration.

    LASP is an affiliate of CU-Boulder AeroSpace Ventures, a collaboration among aerospace-related departments, institutes, centers, government labs, and industry partners."

    LASP/MAVEN - July 19, 2021
    Branson vs. Bezos: who wins the race depends on your definition of outer space

    Full Article & Images

    "The lack of a uniform definition of where space begins has scientific and engineering implications that extend well beyond which billionaire gets there first.

    Shortly after Richard Branson's VSS Unity spaceship successfully touched down in New Mexico last Sunday, the billionaire and his crewmates were awarded shiny astronaut wings to pin onto their cobalt-colored flight suits.

    Astronaut wings are an honor given to people who have completed a flight in space, which NASA, the U.S. Air Force, and the Federal Aviation Administration consider to begin 50 miles (80 kilometers) above the Earth's surface. Yet the international governing body for aeronautic and astronautic records defines the boundary as 62 miles (100 kilometers), suggesting that Branson's flight, which reached 53.5 miles, didn't quite make it into outer space."

    Visit LASP and MAVEN for more information.

    Mars 2020 - Perseverance - July 21, 2021
    NASA Perseverance Mars Rover to Acquire First Sample

    Full Article & Images

    "The six-wheeler's science campaign has laid the groundwork for the mission's next major milestone.

    NASA is making final preparations for its Perseverance Mars rover to collect its first-ever sample of Martian rock, which future planned missions will transport to Earth. The six-wheeled geologist is searching for a scientifically interesting target in a part of Jezero Crater called the "Cratered Floor Fractured Rough."

    This important mission milestone is expected to begin within the next two weeks. Perseverance landed in Jezero Crater Feb. 18, and NASA kicked off the rover mission's science phase June 1, exploring a 1.5-square-mile (4-square-kilometer) patch of crater floor that may contain Jezero's deepest and most ancient layers of exposed bedrock."

    Learn more about the Mars 2020 (Perseverance) mission.

    Mars Science Laboratory - Curiosity - June 29, 2021
    First You See It, Then You Don't: Scientists Closer to Explaining Mars Methane Mystery

    Full Article & Images

    "Why do some science instruments detect the gas on the Red Planet while others don't?

    Reports of methane detections at Mars have captivated scientists and non-scientists alike. On Earth, a significant amount of methane is produced by microbes that help most livestock digest plants. This digestion process ends with livestock exhaling or burping the gas into the air.

    While there are no cattle, sheep, or goats on Mars, finding methane there is exciting because it may imply that microbes were, or are, living on the Red Planet. Methane could have nothing to do with microbes or any other biology, however; geological processes that involve the interaction of rocks, water, and heat can also produce it."

    For information about NASA's partnership with Foursquare.

      Mars Rover Landing - Free for the Xbox 360 (requires Kinect)

      Visit the Mars Science Laboratory page.

    Mars Reconnaissance Orbiter Mission - February 8, 2021
    Where Should Future Astronauts Land on Mars? Follow the Water

    Full Article & Image

    "A new NASA paper provides the most detailed map to date of near-surface water ice on the Red Planet.

    So you want to build a Mars base. Where to start? Like any human settlement, it would be best located near accessible water. Not only will water be crucial for life-support supplies, it will be used for everything from agriculture to producing the rocket propellant astronauts will need to return to Earth.

    Schlepping all that water to Mars would be costly and risky. That's why NASA has engaged scientists and engineers since 2015 to identify deposits of Martian water ice that could be within reach of astronauts on the planet's surface. But, of course, water has huge scientific value, too: If present-day microbial life can be found on Mars, it would likely be nearby these water sources as well."

    MARS RECONNAISSANCE ORBITER HIRISE IMAGES
    All of the HiRISE images are archived here.

    More information about the MRO mission is available online.

    Mars Odyssey Orbiter - April 7, 2021
    NASA's Odyssey Orbiter Marks 20 Historic Years of Mapping Mars

    Full Article and Images

    "NASA's 2001 Mars Odyssey spacecraft launched 20 years ago on April 7, making it the oldest spacecraft still working at the Red Planet. The orbiter, which takes its name from Arthur C. Clarke's classic sci-fi novel "2001: A Space Odyssey" (Clarke blessed its use before launch), was sent to map the composition of the Martian surface, providing a window to the past so scientists could piece together how the planet evolved."

    Daily Mars Odyssey THEMIS Images
    Can be found at the Thermal Emission Imaging System (THEMIS) website.

    The Odyssey data are available through a new online access system established by the Planetary Data System.

    Visit the Mars Odyssey Mission page.

    Journey to Mars - InSight - Revealing the Heart of Mars - July 22, 2021
    NASA's InSight Reveals the Deep Interior of Mar

    Full Article and Images

    "Three papers published today share new details on the crust, mantle, and molten core of the Red Planet.

    Before NASA's InSight spacecraft touched down on Mars in 2018, the rovers and orbiters studying the Red Planet concentrated on its surface. The stationary lander's seismometer has changed that, revealing details about the planet's deep interior for the first time.

    Three papers based on the seismometer's data were published today in Science, providing details on the depth and composition of Mars' crust, mantle, and core, including confirmation that the planet's center is molten. Earth's outer core is molten, while its inner core is solid; scientists will continue to use InSight's data to determine whether the same holds true for Mars."

    Interactive selection of raw images taken by the cameras aboard InSight.

    Learn more about the InSight Mission.

    Mars Missions Status

    New Mars missions are being planned to include several new rover and sample collection missions. Check out the Mars Missions web page and the Mars Exploration page.

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    Astronomy Links and Other Space News

    (If you have a link you would like to recommend to our readers, please feel free to submit it.)

    Green Laser

    Colorado Astronomy Links

    Radio Astronomy Links

    Other Astronomy Links

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    Astronomical Lexicon

    Definitions of astronomical terms. Many of the astronomical terms used in this newsletter are defined here.

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    UT Logo

    Read the Universe Today Newsletter by clicking on the logo.

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    Acknowledgments and References

    Much of the information in this newsletter is from Astronomy® Magazine (Kalmbach Publishing), JPL mission status reports, the Internet, "Meteor Showers - A descriptive Catalog" by Gary W. Kronk, Sky & Telescope web pages, and other astronomical sources that I have stashed on my bookshelves.

    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!

    More Acknowledgements and References

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