Brilliant Venus shines in the southwestern sky about forty minutes after sunset. Look for it on the next clear evening. The planet is emerging from its solar conjunction earlier in the year. Watch Venus approach and pass bright Jupiter in less than two weeks. The Venus-Jupiter conjunction occurs on November 24, 2019.
Read more about Venus as an Evening Star at these links:
Mars is low in the eastern sky about 1 hour before sunrise near the star Spica. The planet is dimmer and redder than blue Spica. During the next several mornings watch Mars move away from Spica. The chart above shows the planet and the star about one hour before sunrise. Both are low in the east-southeast.
Begin looking for the moon in the western sky during pre-sunrise hours on November 12. On the morning of Nov 14, notice that the bright moon is above Aldebaran and the “V” of Taurus.
During these morning hours, watch the moon appear farther east and higher in the sky each morning.
Mercury begins a morning appearance. On November 20, it is low in the east-southeast about one hour before sunrise. Find a clear horizon to see it.
Venus becomes easier to see if you look early enough. The chart above shows the early evening sky, about 30 minutes after sunset on November 11. Venus closes in on Jupiter for a November 24 conjunction. This evening Venus and Jupiter are 13° apart. Saturn is dimmer and farther to south. It will become visible as the sky darkens further.
The bright moon is in the eastern sky during evening hours November 11 – 16. Look for it in the east, beginning one hour after sunset on November 11. Each night look one hour later. It appears in the eastern sky each night, with a slightly different phase, and in front of other stars.
By November 20, brilliant Venus is 3.9° to the lower right of Jupiter. Look shortly after sunset. Find a clear horizon.
The notes were originally published in the Observer.
At mid-month, when morning twilight begins (about 5 a.m. CST), Sirius, Orion’s Belt, Aldebaran, and the Pleiades are lined up in the western sky at nearly the same altitude. The bright gibbous moon is above them in Gemini. Procyon and Capella stand at nearly the same altitude as the moon on November 16th. Leo is farther east. Its great Sickle has not yet reached the meridian. The head of Hydra, the Snake, is at the meridian. Six 3rd and 4th magnitude stars outline the snake’s head. They are nearly 60° up about halfway between Procyon and Regulus. The snake wiggles eastward below Crater and Corvus. The tail goes below the horizon ending near Libra. Alphard, the “Solitary One,” is Hydra’s brightest star, over 20° to the lower right of Regulus and nearly 40° up in the south. It is a second magnitude star, the brightest in this part of the sky. Farther eastward along the ecliptic from Leo, Spica is low in the southeast, with Mars nearby. With Spica in the southeast, Arcturus is nearly 20° up in the east. The Big Dipper is high in the northeast with its curved handle guiding us to Arcturus. Cassiopeia is low in the north-northwest. Mars continues as a not-so-bright star, moving slowly in Virgo. Mercury pops into the morning sky as the second half of the month progresses, brightening as the apparition proceeds. Watch it move toward Mars, but there is no conjunction. Mercury has a nice appearance with Zubenelgenubi, but the star is low in the sky. Find a clear horizon and use a binocular to find the star. At the end of evening twilight (about 6 p.m. CST), the Summer Triangle – Vega, Altair, and Deneb – stands high in the southwest. Jupiter is low in the southwest with Saturn, in eastern Sagittarius, to Jupiter’s upper left. The Great Square of Pegasus approaches the meridian, high in the south. The square’s pair of western stars point downward to Fomalhaut that is less than one-fourth of the way up in the southern sky. The great Winter Congregation is now making its way into the evening sky, with the Pleiades leading the way from low in the east-northeast. Aldebaran is lower near the horizon. Capella is in the northeast, at about the same altitude as the Pleiades. The “fishhook” of Perseus hangs above Capella with Cassiopeia higher and above Pegasus toward the meridian. The Big Dipper may be hiding behind a neighbor’s house or other nearby building as it is low in the north-northwest. Venus continues to move toward Jupiter with a conjunction occurring in over a week.
Look to the southeast, about one hour before sunrise for Mars. It’s not bright but moving eastward among the stars of Virgo. On November 1, it is to the lower right of the star Theta Virginis. Watch it move away from the star during the next few mornings. About 45 minutes before sunrise begin looking for Spica, the brightest star in VIrgo, low in the east-southeast. It is near its heliacal rising. What is the first day you can see it at this time interval without a binocular?
Around November 5, begin looking for Mars approaching the star Spica. By November 10 about one hour before sunrise, Mars, 10° up in the east-southeast, passes 2.8° to the upper left of Spica.
Brilliant Venus continues to slowly climb into the evening sky ahead of passing Jupiter later this month and Saturn in December. Locate it in the southwest about 40 minutes after sunset. It is low, so you’ll need a good view of the horizon. On November 1, the crescent moon is near Saturn. As the month progresses, the moon grows in phase and moves away from the bright evening planets.
The moon is at its First Quarter phase on November 4.
After the moon leaves the area of the planets it moves into dimmer star fields.
Share with us what you observe in the sky in our comments section.
(The daily notes were first published in the Observer, the Newsletter of the Twin Cities Amateur Astronomers.)
These notes describe events for each day:
Venus has been hiding in bright twilight since passing behind the sun. Southern hemisphere observers have been seeing the planet. Now this part of the solar system is easier to see for observers in the mid-northern latitudes.
To see it find a clear southwest horizon, about 30 minutes after sunset. The planet is low in the sky. Each night it sets later. Jupiter and Saturn are higher in the south-southwest. Venus passes Jupiter next month and Saturn in December.
(This article was first published in the Northern Lights Fall Issue)
Mars begins an apparition that takes it to an opposition on October 12, 2020, 808 days following its 2018 perihelic opposition. The opposition, that will be highlighted in a future issue, brings Mars to its closest approach about a week before opposition. On October 6, the closest approach is 35.8 million miles, about 8% farther away than the preceding close passing. This corresponds to a smaller disk presented through a telescope.
The chart above, compiled with data from the U.S. Naval Observatory, shows the morning sky for 13 months beginning August 1, 2019, from Chicago, Illinois. Time intervals are noted on the chart and in the daily notes. Specific times are for Chicago, Illinois. To observe locally, refer to local sources for the times of sunrise and sunset; apply the time differentials in the notes.
The chart displays the time differences between the time of sunrise and the rising times for other planets, moon, and bright stars near the ecliptic, for up to five hours before sunrise. The moon’s rising time difference is displayed with circles. The setting time differences for Jupiter and Saturn, compared to sunrise, are displayed as well. The three phases of twilight are graphed compared to sunrise, and conjunctions are identified. The chart also notes several dates when the moon is near the bright planets.
Mars, Jupiter, and Saturn have oppositions that occur within 91 days in 2020. The interest in the Mars opposition adds a highlight to the Great Conjunction of Jupiter and Saturn that occurs late in the year. Such Jupiter – Saturn conjunctions occur about every 20 years.
Mars’ apparent size at opposition (24.3”) is 8% smaller than the 2018 perihelic opposition and 11% smaller than the 2003 close opposition. This was described above with the close approach that is farther away in 2020 than the most recent perihelic opposition. The chart above displays the apparent size of Mars at its oppositions from 1930 through 2050. The twenty-year intervals of the Jupiter – Saturn Great Conjunction are displayed with yellow stars along with the time interval between their oppositions. For several Mars’ oppositions, the time intervals are noted for the Bright Outer Planets – Mars, Jupiter, and Saturn.
In this summary the events before opposition include monthly passages of the moon that highlight the beginning of a lunar occultation that is easier to view in the Western US, conjunctions with Jupiter, Pluto, Saturn, Ceres, and Neptune.
The apparition began with Mars’ conjunction with the sun on September 2, 2019. While dim, it began a slow crawl into the morning sky. By mid-month Mars was rising at Civil Twilight when the sun was 6° below the horizon.
At the beginning of October, the Red Planet (m = 1.8) is just above the eastern horizon, 45 minutes before sunrise, although it is a binocular object. The planet continues to rise earlier, Nautical Twilight (sun’s altitude = −12°) on October 6. Throughout October it rises earlier, rising at Astronomical Twilight on October 25. In the summary, each entry includes the planet’s magnitude, apparent size, distance from Earth in Astronomical Units, and difference between the planet’s rising time and sunrise, stated in minutes. This time changes in the summary on July 1, 2020, when the difference noted is between sunset and the rising of Mars. Here’s what to look for:
As the year closes, Mars continues its eastward march. Early in the month, bright Mercury is to the lower left of Mars. Still over 2 Astronomical Units from Earth, Mars moves through Libra and between the pincers of the Scorpion. The planet rises about 3 hours before sunrise, but it’s low altitude and southerly location may send you on a chase to find a clear horizon.
As the New Year breaks, Mars is an unimpressive “star” low in the southeast as sunrise approaches, rising about 4 a.m. CST. It continues to move through Libra and Scorpius and into southern Ophiuchus. At mid-month it passes north of its Rival, Antares.
Notice on the rising chart above that the time differential between the rising of Mars and sunrise decreases from late January through early-April. The declination of the sun is greater than Mars’ position. The sun is moving toward the vernal equinox while Mars is approaching the ecliptic’s lowest point. The basic principle is that the farther north an object the earlier it rises. During January and February, the time interval between sunrise and Mars rising decreases nearly 20 minutes. This is reflected in the dip the Mars rising line takes on the chart. The differential increases after Mars moves farther north in declination.
During February, Mars moves from Ophiuchus into Sagittarius, through the rich galactic background of our galaxy’s nucleus region. Use a binocular to track the planet’s motion. After mid-month, the moon occults Mars in a bright sky as sunrise approaches. Mars heads toward conjunctions with Jupiter, Pluto, and Saturn next month. Watch the gaps close during February as the Bright Outer Planets appear above the southeast horizon before sunrise.
Mars marches eastward in Sagittarius, above the Teapot’s handle, and continues to rise earlier. By month’s end, the planet rises before 4 a.m. CDT, as the clock advances one hour on March 8. The gaps to Jupiter, Pluto, and Saturn close as Mars passes the planetary trio this month.
Mars is now moving away from Jupiter and Saturn and through the starfield of Capricornus. Continue to track it with low powers as it passes dimmer stars. It has a close appearance with the moon at mid-month. By month’s end the planet rises before 3 a.m. CDT.
Mars moves from Capricornus into the dim star field of Aquarius early in the month, brightening about 45% as it nears 1.0 Astronomical Unit away. The planet is about 40 times brighter than the stars it passes during the month. Continue to use low power to track the planet on its eastward march. The moon passes at mid-month, although about a degree farther away than in April. The planet passes Ceres late in the month. As April closes, Mars rises before 2 a.m.
During the month, Earth moves within 1 Astronomical Unit of Mars, while the Red Planet’s brightness grows nearly 0.5 magnitude. The planet passes Neptune late in the month. As the month closes, Mars rises at about 12:30 p.m. CDT.
The time differential in the notes changes to rising time after sunset. (On July 8, Mars rises in the east 221 minutes after sunset.) Earth begins to close in on Mars. Now brighter than all the stars, except Sirius from the Northern Hemisphere, Mars gleams from the southeast before morning twilight begins. It moves into Cetus for a short duration, still among dimmer stars. Continue to track it with a binocular, although larger scopes should start to bring in details visually. The morning sky has a planet parade of all the planets in the solar system. In addition to ruddy Mars, brilliant Venus joins, Jupiter and Saturn, although brilliant Venus shines from the eastern sky. Jupiter and Saturn pass opposition six days apart, then Mercury pops into the sky. This results in 5 naked eye planets in the sky at once. Additionally, the telescopic planets are there as well: Uranus, Neptune, and Pluto. (Historically, Pluto is a planet. Without too much description, we have many things in astronomy that are misnamed – like planetary nebula.)
Mars, now back in the constellation Pisces, continues its eastward march, as its brightness grows. While Mars brightens, Venus dominates the morning sky. Mars passes perihelion on August 2.
Earth closes to within 0.5 Astronomical unit of Mars. The planet is now appearing above the eastern horizon before midnight. Mars slows and stops its eastward motion against the starry background.
Until retrograde began, Mars passed four planets and a minor planet, and had an occultation with the moon. Earth is now closing in toward its closest approach and Mars’ opposition, about a month away. While not as close as the last perihelic opposition, the next opposition occurs farther north and promises great views. In a later issue, we pick up the story of Mars at opposition.
The moon returns to the evening sky and passes Jupiter and Saturn early in October 2019. The following summarizes the evenings, one hour after sunset. (Check your local sources for the time of sunset for your location.)
Happy observing!
Annual meteor showers occur when our planet passes through the dusty debris that are spread broadly along a comet’s celestial path. Each year during mid-August, Earth passes through the track of Comet Swift-Tuttle. Tiny bits of dusty rock smash into our planet’s atmosphere and are vaporized in a quick streak of light — a meteor or shooting star. During this time, the meteors can be seen anywhere in the sky, but they seem to emerge from the region of the constellation Perseus in the northeastern sky during the early evening. As Earth rotates during the night, the point of emergence (radiant) moves higher in the sky. The best viewing occurs after midnight when the radiant is highest in the sky before morning twilight begins,
It is important to note that the rates that are published in the popular press include dim meteors and those that dazzle our eyes and temporarily leave a streaked glow in the atmosphere. It is impossible for any one observer to see all the projected meteor counts. Today many live in cities or larger metropolitan where the glow of bright streetlights wash out the dimmer nighttime stars and dimmer meteors during this shower.
So, for observers in metropolitan areas should half the projected rates (60 meteors per hour). So we’re down to 30 meteors per hour for most observers in metropolitan areas. To see the entire sky, the observer needs an all sky camera to catch all the meteors or four friends who look above the cardinal directions while the single observer looks overhead. So, a lone observer can see 5-6 meteors per hour in a metropolitan area or 10-12 per hour in a dark location. So be patient, especially this year with a bright moon in the sky during the morning.
This year, a gibbous moon adds bright light, so the observable rate is reduced further to perhaps 2-3 in town, 4-6 away from lights.
Here are notes for the mornings of August 11-13 that include some planet observations. Times are in Central Daylight Time for observers near Chicago Illinois.
