Posts Tagged ‘Aphelion’

July 2010

Thursday, July 1st, 2010

Lunar Events

The New Moon for July occurs on Sunday, July 11 which will make the weekend of July 10-11 the very best for dark sky observing.

The Full Moon occurs on July 25th and is known as the Full Sturgeon Moon or Full Grain Moon.

Celestial Events

Total Solar Eclipse

On July 11th, there is a Total Eclipse of the Sun which will be visible across the South Pacific and can be partially visible to the south part of South America. solar Eclipse


This movie shows the July 11, 2010 Solar Eclipse as view from the Moon. Note the Moon’s shadow moving west to east across the South Pacific. Each frame is one minute.

Aphelion - July 6, 2010

Aphelion

The Aphelion is the point in Earth’s elliptical orbit that it is furthest from the Sun.  This is the opposite point to the Perihelion when the Earth is at its closest point to the Sun, which occurs in January.

Mercury

Mercury emerges into the evening sky from the glare of the Sunset around July 8th.

Mercury begins July, hidden by the Sun, in the constellation Gemini (The Twins) and on July 8th, as it crosses into the constellation Cancer (The Crab), it emerges from the glare of the Sun. On July 19th, Mercury moves into the constellation Leo (The Lion).

Mercury, M44 and Moon
On the evenings of July12th and 13th, Mercury can be observed passing through the Beehive Cluster (M44) and on July 12th, the waxing, crescent moon will pass less than 5° from Mercury.

On July 27th, Mercury and the Star Regulus will be in conjunction and be a mere 0°25’ apart. Mercury Regulus

Venus

Venus is the Evening Star and can be found in the constellation Leo (The Lion) for the entire month of July.

Venus & Regulus
On July 9th, Venus and the Star Regulus will be in conjunction less than 1° from each other.

Venus and Moon
On July 14th, the waxing, crescent Moon will pass within 6°45’ of Venus.

Mars

Mars is observable in the evening hours all month. Mars set at the start of July around 11:35 pm (PDT) and by the end of the month is setting around 10:20 pm (PDT).

Mars begins July in the constellation Leo (The Lion) and on July 17th passes into the constellation Virgo (The Maiden).

Mars and Moon
On July 15th, Mars sets less than 7° of waxing, crescent Moon.

Mars and Saturn
July 31st finds Mars and Saturn in conjunction less than 1°50’

from each other.

Jupiter

Jupiter can be found in the constellation Pisces (The Fish) from the very late evening to morning hours of July. Jupiter rises around 12:30 am (PDT) at the start of July and by the end rises around 10:30 pm (PDT).

Jupiter Uranus and Moon
On July 3rd, the waning, gibbous Moon sets about 7° from Jupiter.

On July 23rd, Jupiter begins retrograde motion across the sky moving each night from West to East.

Jupiter Uranus and Moon
On July 30, the waning, gibbous Moon passes less than 6° from Jupiter.

Saturn

Saturn is located in the constellation Virgo (The Maiden) until December 2012. Saturn is observable from the very late evening hours through the morning, rising around 12:20 am (PDT) at the start of July and by the end rising around 10:25 pm (PDT).

Mars and Saturn
July 31st find Mars and Saturn in conjunction less than 1°50’
from each other.

Uranus

Uranus can be found in the vicinity of the planet Jupiter all month. Uranus is located in the constellation Pisces (The Fish) until May 2012. Uranus is observable from the very late evening hours though morning this month. At the start of July Uranus rises around 12:20 pm (PDT) and by the end of the month rises around 10:20 pm (PDT).

Jupiter Uranus and Moon
On July 3rd, the waning, gibbous Moon passes within 5°45’ of Uranus.

Jupiter Uranus and Moon
On July 30th the waning, gibbous Moon passes within 5°30’ of Uranus.

Neptune

Moving in retrograde this month, Neptune is located in the constellation Aquarius (The Water Bearer) for the entire month of July. Neptune can be observed from the very late evening hours though morning. Uranus rises about 12:20 am (PDT) at the start of July, and by the end, rises around 10:20 pm (PDT).

Neptune and Moon On July 27th, the waning, gibbous Moon passes within 3°35’ of Neptune.

Pluto

Pluto is located in the constellation Sagittarius (The Archer) until the year 2023.  Pluto is in excellent position for observing and is up all night all month.

On July 23rd, the waxing, gibbous Moon passes with 6° of Pluto. Pluto and Moon

January 2010

Friday, January 1st, 2010

Lunar Events

The New Moon for January occurs on Thursday, January 14th which will make the weekend on January 16-17 the best weekend for dark sky observing.

On January 29th is the Full Snow or Hunger Moon.

On January 14th, there will be an Annular Solar Eclipse.  Unfortunately it is only visible from East Africa, the Indian Ocean, Southern India and Southeast Asia.

Solar Eclipse

An Eclipse occurs when one astronomical object moves into the shadow of another. The two types of eclipses of most interest to Earthlings, are Solar Eclipses when the Moon’s shadow is cast across the seurface of the Earth, and Lunar Eclipses where the Earth’s shadow is cast onto the Moon. Lunar and Solar Eclipses usually occur two weeks from each other. Solar Eclpse always occur during a New Moon and Lunar Eclipses always occur during a Full Moon.

Celestial Events

The Perihelion of Earth occurs on January 2nd.

Perihelion

The Perihelion is the point in Earth’s elliptical orbit that it is closest to the Sun.  This is the opposite point to the Aphelion when the Earth is at its furthest point to the Sun, which occurs in June.

Mercury

Mercury is located in the constellation Sagittarius (The Archer) all month, but will not be observable until January 9th when it emerges from the glare of the morning Sun.  Around January 15th, Mercury halts its retrograde and reaches its Greatest Western Elongation on January 26th and at that time will be 24°45’09” from the Sun, for best morning views.

Mercury Elongation Elongations occur when the planet position in its orbital path is at tangent to the view from Earth. Because these inner planets are inside the Earth’s orbit, their positions as viewed from the Earth are never very far from the position of the Sun. When a planet is at Elongation is it furthest from the Sun as viewed from Earth, so it’s view is best at that point. There are two kinds of Elongations: The Eastern Elongation occurs when the planet is in the evening sky and the Western Elongation Occurs when a planet is in the morning sky.

Mercury, Pluto and the Moon
On January 13th, Mercury will pass within 2°50’ of the former planet Pluto and less than 6° of the waning, crescent moon.

Venus

The planet Venus is not observable this month as it passes in proximity to the Sun as it moves from morning to evening hours.

Venus begins the month in the constellation Sagittarius (The Archer) and moves to the constellation Capricornus (The Sea Goat) on January 18th.

Mars

Mars is in fantastic position for observation for the next few months due to the fact that Mars reaches Opposition on January 29th

Mars is observable all night, all month; Rising around 8:45 pm (PST) at the start of January and rising around 5:50 pm (PST) by the end of the month.  Mars can be found in the constellation Leo (The Lion) at the start of the month and on January 9th, Mars moves to the constellation Cancer (The Crab).

Mars Opposition

For planets outside the Earth’s orbit (Mars, Jupiter, Saturn, Uranus, Neptune and Pluto), the months around Oppositions are the best time to view these. An Opposition occurs when the planet is opposite from the Sun relative to the Earth. At Opposition the planet will rise as the Sun sets and will set as the Sun rises providing an entire night of observation. Also at Opposition the planet comes physically closest to the Earth in it’s orbit so it appears as large as possible.

Mars and Moon
On January 2nd, the Waning, gibbous Moon passes within 6°37’ of Mars.

Mars at Opposition and Full Moon
On January 29th, when Mars is at opposition, the Full Moon passes within 6°21’ of Mars.

Jupiter

Jupiter can be observed in the evening hours on January. At the start or the month Jupiter sets around 9:25 pm (PST) and by the end of the month it sets around 8:00 pm (PST).  Jupiter is located at the start of January in the constellation Capricornus (The Sea Goat), and on January 5th, moves into the constellation Aquarius (The Water Bearer).

Jupiter and Moon
On January 17th a Waxing, crescent moon rises within 4°10’ of Jupiter.

Saturn

Saturn is observable from the mid-night hours until morning in the constellation Virgo (The Maiden).  Saturn rises around 12:30 am (PST) at the start of January and rises around 10:25 pm (PST) at the end of the month.

Saturn and Moon
On January 6th the waning, gibbous moon passes within 8° of Saturn.

Uranus

The planet Uranus is observable in the evening in January.  Uranus sets around 11:30 pm (PST) at the beginning of January and by the end is setting around 9:40 pm (PST).  Uranus will move out of the constellation Aquarius (The Water Bearer) and into the constellation Pisces (The Fish) on January 14thUranus will remain in Pisces until May, 2012.

Uranus and Moon
On January 19th, Uranus will set within 5°30’ of the waning, crescent moon.

Neptune

Neptune is located in the constellation Capricornus (The Sea Goat) until March 2010.  Neptune is observable in the evening hours of January until the end of the month when it will disappear into the glare of the sunset.  Neptune sets at the start of January around 9:15 pm (PST) and by the end is setting around 7:25 pm (PST).

Pluto

Pluto is located in the constellation Sagittarius (The Archer) until the year 2023.  Pluto emerges in the morning hours after January 8th; rising around 7:15 am (PST) at the start of the month and rising around 5:20 am (PST) at the end.

Pluto and M2ercury and Moon
January 14th finds Pluto within 2°45’ of the planet Mercury.

July 2009

Wednesday, July 1st, 2009

Lunar Events

The Full Moon for July occurs on July 7th, and is known as the Full Buck Moon or Thunder Moon.  Also, since it is the closest Full Moon to the Summer Solstice, it can be known as the Honey Moon.




July 7 1:40am-3:30am (PDT) - Movie shows the slight penumbral Lunar Eclipse as viewed from Los Angeles. Each frame is one minute.

In the very early morning hours of July 7th a very slight Penumbral Lunar Eclipse will be visible from the Pacific rim, including western South America, the West Coast of Mexico and South Western United States, Hawaii, New Zealand, eastern Australia and the Pacific side of Antartica.




July 7 1:40am-3:30am (PDT) - Movie shows Earth and Sun as viewed from Moon during the slight penumbral Lunar Eclipse. Each frame is one minute.

The New Moon for July is Tuesday, July 21st.  This will make the weekend of July 18-19th as the best weekend for dark sky observing.

Celestial Events

Earth reaches its Aphelion on July 4, 2009

Aphelion The Aphelion is the point in Earth’s elliptical orbit that it is furthest from the Sun.  This is the opposite point to the Perihelion when the Earth is at its closest point to the Sun, which occurs in January.

Total Solar Eclipse

Depending on the location on Earth, there is a Total Solar Eclipse on July 21st or 22nd. Visible from Eastern China, Japan and the South Western Pacific, the eclipse crosses the International Date Line.




Movie shows the Total SolarEclipse as viewed from the Moon. Each frame is one minute. The Shadow of the moon Crosses Eastern China, Japan, and the South West Pacific.




Movie shows the Total SolarEclipse as viewed from Japan. Each frame is one minute.

Mercury

Mercury is visible the first few days of July in the morning hours.  By July 4th, Mercury disappears into the glare of the sunrise and reappears on the evening side of the Sun around July 24th.  After July 24th Mercury continues to move in better position for viewing until August 24th when Mercury reaches its Greatest Eastern Elongation.

July 1st Sunrise - Mercury’s position in the morning at the beginning of the month. Mercury disappears into the glare of the Sun around July 4th. July 1 - Mercury

Mercury begins the month in the constellation Taurus (The Bull), and on July 3rd, crosses into the constellation Gemini (The Twins). Then behind the glare of the Sun, Mercury crosses Gemini until July 16th when it moves into Cancer (The Crab), and after Mercury re-emerges in the evening, it moves finally into the constellation Leo (The Lion) on July 26, where it will spend the rest of July.

July 31 - Mercury
July 31 Sunset - By the end of the month, Mercury is visible in the
evening. Mercury re-emerges from the glare of the Sun around July 24th.

Venus

Venus is visible as the Morning Star for the entire month of July.  Venus begins this month in the constellation Taurus (The Bull) until the end of the month.  On July 29 Venus crosses into the constellation Orion (The Hunter)  where it will stay until the last few minutes of July and it crosses into the constellation Gemini (The Twins).

July 4 - Venus and M45
On July 4th Venus will pass within 7° of the asterism Pleiades (M45).

July 18 - Venus, Mars, M45, Moon
On July 18th Venus, Mars, the asterism Pleiades (M45) and the waning, crescent Moon are group together within 16° of each other.

July 19 - Venus and Moon
On July 19th Venus rises within 6°45′ of the waning, crescent Moon.

Mars

Mars can be observed in the morning hours above Venus in July.  At the beginning of the month Mars is only about 4° above Venus and as the month progresses Venus continues to move further away until the end of the month they are about 16° apart.

Mars starts the month in the constellation Aries (The Ram) and on July 2nd moves into the constellation Taurus (The Bull) where it will spend the rest of July.

Mars rises around 2:45 am (PDT) at the first of the Month and by the end of July Mars rises at 2:00am.

On July 12th, Mars passes within 4°45′ of the asterism Pleiades (M45). July 12 - Mars and M45

July 18 - Mars and Moon
On July 18th, the waning, crescent Moon will pass within 5° of Mars.

Jupiter

The planet Jupiter is found in the constellation Capricornus (The Sea Goat until January 2010.  Moving in retrograde motion this month, Jupiter is observable from the late evening hours until sunrise.

At the beginning of July, Jupiter rises around 10:46 pm (PDT) and at the end of the month Jupiter is rising around 8:40 pm (PDT).

July 10 - Jupiter and Neptune
On July 10th, Jupiter passes within 0°30’ of the planet Neptune and
about 6°15′ of the waning, gibbous Moon.

Saturn

The planet Saturn is visible in the evening all month.  At the beginning of July Saturn sets around 11:45 pm (PDT) and by the end of the month Saturn sets around 9:15 pm (PDT).  Saturn is located in the constellation Leo (The Lion) until September.

July 24 - Saturn and Moon
On July 24th, the waxing, crescent Moon sets about 8° below Saturn.

Uranus

The planet Uranus is found in the constellation Pisces (The Fish) until October. At the start of July Uranus rises around midnight and by the end of the month Uranus rises around 10:00 pm (PDT).

July 12 - Uranus and Moon On July 12th, Uranus rises within 4°30′ of the waning, gibbous Moon.

Neptune

Neptune is located in the constellation Capricornus (The Sea Goat) until the year 2010. For the entire month of July, Neptune rises within a few minutes of Jupiter. At the beginning of the month Neptune rises around 10:45 pm (PDT) and by the end of July Neptune rises around 8:45 pm (PDT).  Neptune is currently moving in retrograde motion.

July 10 - Jupiter and Neptune
On July 10th, Jupiter passes within 0°30′ of the planet Neptune and
about 6°15′ of the waning, gibbous Moon.

Pluto

Pluto is found in the constellation Sagittarius (The Archer) until the year 2023.  Moving in retrograde motion this month, Pluto sets around 5:25 am (PDT) at the beginning of July, and by the end of the month, Pluto sets around 3:20 am (PDT).

July 15 - Pluto
July 15 evening - Relative position, in the South East, of Pluto for
the month of July.


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