June Celestial Calendar by Dave Mitsky
All times, unless otherwise noted, are UT (subtract four hours and, when appropriate, one calendar day for EDT)
6/1 Asteroid 4 Vesta is stationary at 7:00; Jupiter is 6 degrees north of the Moon at 8:00
6/2 Mercury is 0.2 degree south of the bright open cluster M35 in Gemini at 13:00
6/3 The Moon is at apogee, subtending 29'30" from a distance of 404,954 kilometers (251,627 miles), at 4:00; a double Galilean satellite shadow transit begins at 17:08; a rare triple Galilean satellite shadow transit begins at 18:08
6/5 Mercury is at the descending node today; the Purbach Cross or Lunar X, an X-shaped illumination effect involving various rims and ridges between the craters La Caille, Blanchinus, and Purbach, is predicted to occur at 6:35; First Quarter Moon occurs at 20:39
6/7 Venus is at its greatest heliocentric latitude south today; Mercury is stationary at 10:00; asteroid 1 Ceres is stationary at 22:00
6/8 Mars is 1.6 degrees north of the Moon at 1:00; the Moon is 1.8 degrees north of the first-magnitude star Spica (Alpha Virginis) at 22:00
6/10 Neptune is stationary at 6:00; Saturn is 0.6 degree north of the Moon, with an occultation occurring in far southern South Africa, Queen Maud Land, and the South Georgia and South Sandwich Islands, at 19:00; a double Galilean satellite shadow transit begins at 22:07
6/11 Mars is at the descending node today
6/13 Full Moon (known as the Flower, Rose or Strawberry Moon), occurs at 4:11
6/14 The earliest sunrise of the year at latitude 40 degrees north occurs today
6/15 Mercury is at aphelion today; the Moon is at perigee, subtending 33'00" from a distance of 362,065 kilometers (224,977 miles), at 3:00
6/17 The earliest morning twilight of the year at latitude 40 degrees north occurs today
6/18 Neptune is 5 degrees south of the Moon at 10:00
6/19 Last Quarter Moon occurs at 18:39; Mercury is in inferior conjunction at 23:00
6/21 Uranus is 1.6 degrees south of the Moon at 3:00; the Curtiss Cross, an X-shaped illumination effect located between the craters Parry and Gambart, is predicted to occur at 9:02; summer solstice in the northern hemisphere occurs at 10:51; Jupiter is 6 degrees south of the first-magnitude star Pollux (Beta Geminorum) at 12:00
6/22 Venus is 6 degrees south of the bright open cluster M45 (the Pleiades) in Taurus at 12:00
6/24 The latest evening twilight of the year at latitude 40 degrees north occurs today; Venus is 1.3 degrees north of the Moon at 13:00
6/25 The Moon is 2 degrees north of the first-magnitude star Aldebaran (Alpha Tauri) at 7:00
6/27 The latest sunset of the year at latitude 40 degrees north occurs today; New Moon (lunation 1132) occurs at 8:08
6/29 Jupiter is 5 degrees north of the Moon at 3:00
6/30 The Moon is at apogee, subtending 29'26” from a distance of 405,930 kilometers (252,233 miles), at 19:00
Giovanni Cassini (1625-1712), Charles Messier (1730-1817), and George Ellery Hale (1868-1938) were born this month.
The usually minor June Boötid meteor shower peaks on the morning of June 27th. June Boötids are the slowest of all meteors, travelling at 18 kilometers (11 miles) per second.
Information on Iridium flares and passes of the ISS, the Tiangong-1, the USAF’s X-37B, the HST, and other satellites can be found at http://www.heavens-above.com/
The Moon is 3.2 days old and is located in Gemini on June 1st at 0:00 UT. At that time, it is illuminated 9.9%. The Moon is at its greatest northern declination of +19.1 degrees on June 26th and its greatest southern declination of -19.1 degrees on June 13th. Longitudinal libration is at a maximum of +6.2 degrees on June 21st and a minimum of -6.8 degrees on June 9th. Latitudinal libration is at a maximum of +6.7 degrees on June 1st and +6.6 degrees on June 28th and a minimum of -6.6 degrees on June 15th. See http://www.lunar-occ...ota/iotandx.htm for information on lunar occultations taking place this month. Visit http://saberdoesthes...does-the-stars/ for tips on spotting extreme crescent Moons. Times and dates for the lunar light rays predicted to occur this month are available at http://www.lunar-occ...o/rays/rays.htm
The Sun is located in Taurus on June 1. The Sun reaches its farthest position north for the year on June 21st. There are 15 hours of daylight at latitude 40 degrees north on the day of the summer solstice.
Brightness, apparent size, illumination, distance from the Earth in astronomical units, and location data for the planets and Pluto on June 1: Mercury (magnitude +1.9, 9.5", 25% illuminated, 0.71 a.u., Gemini), Venus (magnitude -4.1, 13.9", 77% illuminated, 1.20 a.u., Aires), Mars (magnitude -0.5, 11.8", 91% illuminated, 0.79 a.u., Virgo), Jupiter (magnitude -1.9, 32.9", 100% illuminated, 5.99 a.u., Gemini), Saturn (magnitude +0.2, 18.5", 100% illuminated, 8.97 a.u., Libra), Uranus on June 16th (magnitude +5.9, 3.5", 100% illuminated, 20.37 a.u., Pisces), Neptune on June 16th (magnitude +7.9, 2.3", 100% illuminated, 29.66 a.u., Aquarius) and Pluto on June 16th (magnitude +14.1, 0.1", 100% illuminated, 31.70 a.u., Sagittarius).
Mercury is in the northwest, Mars is in the southwest, Jupiter is in the west, and Saturn is in the south in the evening sky. At midnight, Mars and Saturn lie in the southwest. Venus and Uranus can be found in the east and Neptune in the southeast at dawn.
Mercury is less than one half of a degree south of the bright open cluster M35 on June 2nd. It is at the descending node on June 5th. On June 6th, Mercury begins retrograde motion. It is stationary on June 7th and is at aphelion on June 15th. The speedy planet is at inferior conjunction on June 19th and is lost in the glare of the Sun for the remainder of June. For further information on the current apparition of Mercury, see http://www.curtrenz.com/mercury
Venus continues to shrink in apparent size (13.9 to 12.0 arc seconds) but grow in illumination (77 to 85%) this month. It rises about two hours before sunrise. Venus departs Aries and enters Taurus on June 18th. The brightest planet is located a bit more than two degrees south of the waning crescent Moon on the morning of June 24th. During the last week of June, Venus passes between M45 (the Pleiades) and the Hyades.
Mars shrinks in apparent size (11.8 to 9.5 arc seconds) and decreases in brightness (-0.5 to 0.0 magnitude), as it continues to recede from the Earth. At sunset, it is already to the west of the meridian. Mars is less than two degrees north of the Moon for western hemisphere observers on the night of June 7th. It is at the descending node on June 11th, as it passes south of the ecliptic. June marks the end of productive telescopic observing of the planet with small and medium apertures.
The gas giant Jupiter disappears into the glare of evening twilight by the end of June. A 95-minute-long triple Galilean satellite shadow transit takes place on June 3rd but occurs during the daytime from the western hemisphere. On June 21st, Jupiter passes 6 degrees south of Pollux. Browse http://www.skyandtel...watching-tools/ in order to determine transit times of Jupiter’s central meridian by the Great Red Spot. Data on the Galilean satellite events is available at http://www.skyandtel...watching-tools/
At midmonth, Saturn shines at magnitude 0.3 and spans 18.3 arc seconds as it retrogrades in Libra. Its rings subtend 42 arc seconds and are inclined by 21 degrees. Saturn is occulted by the Moon in some parts of the southern hemisphere on June 10th. The peculiar satellite Iapetus shines at tenth-magnitude this month. It lies 2.3 arc minutes south of the planet on June 12th and 8.8 arc minutes west of the planet on June 30th. For more on Saturn’s satellites, browse http://www.skyandtel...watching-tools/
During June, Uranus can be found two to three degrees south-southwest of the fourth-magnitude star Delta Piscium. The sixth-magnitude stars 73 and 80 Piscium lie to the east of Uranus. Observers in the southern hemisphere have a better view due to the angle of the ecliptic.
Neptune is located between two seventh magnitude stars, approximately two degrees northeast of the fifth-magnitude star Sigma Aquarii. The distant planet begins retrograde motion on June 10th.
Finder charts for Uranus and Neptune can be found at http://d366w3m5tf081...s_Neptune_20...
Pluto lies in northern Sagittarius, about one half of a degree north of the fifth-magnitude star Xi1 Sagittarii. A finder chart is available on pages 50 and 51 of the June issue of Sky & Telescope and at http://www.bluewater...2014_2_810K.jpg
For more on the planets and how to locate them, browse http://www.nakedeyeplanets.com/
Comet C/2012 K1 (PanSTARRS) shines at eighth magnitude, as it travels southeastward through Ursa Major and into Leo Minor this month. It lies four degrees east of the third-magnitude star Mu Ursae Majoris on June 1st. An ephemeris is available at http://scully.cfa.ha...?d=c&o=CK12K010 and a finder chart on page 50 of the May issue of Sky & Telescope. Visit http://cometchasing.skyhound.com/ for additional information on this and other comets visible during June.
This month asteroid/minor planet 1 Ceres and asteroid 4 Vesta glide southeastward through Virgo. The two brightest asteroids (they shine at eight and seventh magnitude respectively this month) remain within two degrees of each other and lie approximately ten degrees north of the first-magnitude star Spica. From June 29th to July 5th, 1 Ceres and 4 Vesta are separated by less than one half of a degree. Finder charts can be found at http://d366w3m5tf081..._Vesta_2014.pdf and on page 53 of the May issue of Astronomy. Click on http://www.skyandtel...s-and-vesta-... for more on Ceres and Vesta. Consult http://www.minorplan...2014/index.html for ephemerides on other bright asteroids. Information on asteroid occultations taking place this month is available at http://www.asteroido.../2014_06_si.htm
A wealth of current information on solar system celestial bodies is posted at http://www.curtrenz.com/astronomical
Browse http://astrocast.tv/ for an informative video on astronomical events taking place this month.
A free star map for June can be downloaded at http://www.skymaps.com/downloads.html and http://www.telescope...thly-Star-Chart
Forty binary and multiple stars for June: Struve 1812, Kappa Bootis, Otto Struve 279, Iota Bootis, Struve 1825, Struve 1835, Pi Bootis, Epsilon Bootis, Struve 1889, 39 Bootis, Xi Bootis, Struve 1910, Delta Bootis, Mu Bootis (Bootes); Struve 1803 (Canes Venatici); Struve 1932, Struve 1964, Zeta Coronae Borealis, Struve 1973, Otto Struve 302 (Corona Borealis); Struve 1927, Struve 1984, Struve 2054, Eta Draconis, 17-16 Draconis, 17 Draconis (Draco); 54 Hydrae (Hydra); Struve 1919, 5 Serpentis, 6 Serpentis, Struve 1950, Delta Serpentis, Otto Struve 300, Beta Serpentis, Struve 1985 (Serpens Caput); Struve 1831 (Ursa Major); Pi-1 Ursae Minoris (Ursa Minor); Struve 1802, Struve 1833, Phi Virginis (Virgo)
Notable carbon star for June: V Coronae Borealis
Fifty deep-sky objects for June: NGC 5466, NGC 5676, NGC 5689 (Bootes); M102 (NGC 5866), NGC 5678, NGC 5879, NGC 5905, NGC 5907, NGC 5908, NGC 5949, NGC 5963, NGC 5965, NGC 5982, NGC 5985, NGC 6015 (Draco); NGC 5694 (Hydra); NGC 5728, NGC 5791, NGC 5796, NGC 5812, NGC 5861, NGC 5878, NGC 5897 (Libra); M5, NGC 5921, NGC 5957, NGC 5962, NGC 5970, NGC 5984 (Serpens Caput); M101, NGC 5473, NGC 5474, NGC 5485, NGC 5585, NGC 5631 (Ursa Major); NGC 5566, NGC 5634, NGC 5701, NGC 5713, NGC 5746, NGC 5750, NGC 5775, NGC 5806, NGC 5813, NGC 5831, NGC 5838, NGC 5846, NGC 5850, NGC 5854, NGC 5864 (Virgo)
Top ten deep-sky objects for June: M5, M101, M102, NGC 5566, NGC 5585, NGC 5689, NGC 5746, NGC 5813, NGC 5838, NGC 5907
Top five deep-sky binocular objects for June: M5, M101, M102, NGC 5466, NGC 5907
Challenge deep-sky object for June: Abell 2065
The objects listed above are located between 14:00 and 16:00 hours of right ascension.
June 2014 Celestial Calendar
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