Astronomy News for the Month of October 2025


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For amateur radio operators and scanner enthusiasts around the world, please join the Colorado Astronomy Net on the Rocky Mountain Radio League's K1DUN repeater on 449.450 MHz or other digital and analog repeaters, Allstar nodes, Echolinks, DMR and internet links connected to the SKYHUBLINK system. The net meets on Tuesday nights at 7 P.M. Mountain Time (US) (Wednesday at 0200 GMT). Connecting to the SkyHubLink system has expanded our coverage in the U.S., Canada and internationally. All Amateur radio operators worldwide are welcome. Anyone may listen to the net. The RMRL provides a "Live Audio Feed" using Broadcastify.

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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.
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Rocket Report for 10/21/2025 through 11/04/2025
Courtesy of "The Rocketman" Ed W6RDZ
Updated Weekly on Tuesday evenings
prior to the Colorado Astronomy Net

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.


"Mercury (top) and Mars appear in a patch of clear sky near the top of this photo during their 2024 conjunction. This month brings another meeting of the two planets." Astronomy Magazine, October 2025, p. 28. - GIANNI TUMINO


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


21 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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Calendar of All Astronomical Events 2025

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.

(Times are Mountain Daylight Time (MDT/MST) unless otherwise noted. Times will vary slightly depending on your location.)

Planetary Highlights for October

"October's longer nights bring two transits of Titan across Saturn, while Io and Europa tango together across Jupiter three times. Mercury and Mars make a brief evening appearance, and Venus dominates the morning sky. Plus, the fine Orionid meteor shower occurs during the dark of the Moon." Astronomy Magazine, October 2025, p.28.

Mercury

Mercury is at greatest eastern elongation (24°) on the 29th. Mercury sets at 7:13 p.m. on the 1st and about 6:55 p.m. by month's end. Mercury is visible about 30 minutes after sunset just above the western horizon. Mercury moves from the constellation of Virgo into Scorpius shining at magnitude -0.1 on the 31st.

Venus

Rises about 4:57 a.m. on the 1st and about 6:06 a.m. by month's end. Look for Venus to the east about an hour before sunrise. Venus moves from the constellation of Leo into Virgo shining at magnitude -3.9 on the 15th.

Earth

N/A.

Mars

Sets at 7:49 p.m. on the 1st and about 6:50 p.m. by month's end. Look for Mars low to the west in the evening about 30 minutes after sunset. Mars moves from the constellation of Virgo into Libra shining at magnitude 1.5.

Jupiter

Rises at 12:37 a.m. on the 1st and about 10:43 p.m. by month's end. Look for Jupiter to the south in the early morning hours before dawn. Jupiter is in the constellation of Gemini shining at magnitude -2.2.

Saturn

Rises at 6:19 p.m. on the 1st and about 4:13 p.m. by month's end. Look for Saturn low to the east in the evening sky. Follow Saturn across the sky all night long. Saturn moves from the constellation of Pisces into Aquarius shining at magnitude 0.7.

Uranus

Rises at about 8:58 p.m. on the 1st and about 6:53 p.m. by month's end. Look for Uranus to the southeast in the late evening. Uranus is in the constellation Taurus shining at magnitude 5.6.

Neptune

Rises at 6:21 p.m. on the 1st and about 4:17 p.m. by the month's end. Look for Neptune low to the east in the evening just northeast of Saturn all month. Neptune is in the constellation of Pisces shining at magnitude 7.7.

Dwarf Planets

Ceres

Is at opposition on the 2nd, rising as the Sun sets. Ceres rises at 7:46 p.m. on the 1st and about 5:24 p.m. by month's end. Ceres can be spotted low to the south near midnight when it is highest in the sky. Ceres is at its best viewing for the year this month. Ceres is in the constellation of Cetus shining at magnitude 7.7.

Pluto

Is stationary on the 14th. Pluto sets at 1:14 a.m. on the 1st and about 11:09 p.m. by month's end. The best time to spot Pluto will be in the late evening when it is highest in the sky to the southwest. Pluto is in the constellation of Capricornus shining at magnitude 15.3.

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

Constellation information provided by Go Astronomy.

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Astronomical Events

Meteor Showers

  • The Draconids - This shower is associated with periodic comet Giacobini-Zinner. The duration may extend from October 6 to 10, though the point of maximum is very sharply defined within a 4-hour interval on October 9, but the annual maximum hourly rates are not consistent. The radiant rarely produces any recognizable shower except during years especially close to the parent comet's perihelion passage. The meteors are slow and tend to be relatively faint. They are generally yellow.

  • The Orionids - The duration of this meteor shower extends from October 15 to 29, with maximum occurring on (the morning of) October 21. The maximum hourly rate is usually about 20 and the meteors are described as fast.

  • The Southern Taurids - This meteor shower is active from September 10 to November 20. Maximum occurs on the morning of October 10. Maximum hourly rate is 5 meteors per hour. The meteors are described as bright and move more slowly than typical meteors, making them prime subjects for imaging and viewing.

    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

  • Comet C/2025 A6 (Lemmon) is passing through the constellations of Canis Venatici and Boötes low to the west during the last two weeks of the month, shining around 8th magnitude. A 3 inch scope or greater and dark skies will be needed to view it.

  • For information, orbital elements and ephemerides on observable comets, visit Observable Comets.

    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 Mars and Mercury in the early evening to the west.
  • Look for Pluto in the early evening to the southwest.
  • Look for Saturn, Neptune and Ceres in the late evening and early morning to the south.
  • Look for Uranus, Jupiter and Venus in the morning to the east.

  • Asteroids

    (From west to east)
    Ocultations

    IOTA Logo

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

  • The Moon occults the Pleiades on the 9th.

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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
    3871-2015 2015-11-13 01:55 MST CO Charles N 3871a
    3587-2015 2015-11-22 17:38 MST CO Kevin S 3587aw
    3829-2015 2015-12-05 18:06 MST CO Burness A 3829a
      986-2020 2020-02-21 22:20 MST CO Lukas S 986
    3716-2020 2020-07-24 23:22 MDT CO Lukas S 3716
    4774-2021 2021-08-13 21:57 MDT UT Lukas S 4774
    7044-2021 2021-10-28 20:37 MDT CO Burness A 249058
    6763-2022 2022-10-06 05:56 CDT OK Mike C 6763
    5300-2023 2023-09-11 22:04 MDT CO Lukas S 5300
    578-2024 2024-01-28 23:05 MST CO Lukas S 578

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