Astronomical Diary
Last Quarter New Moon First Quarter Full Moon
Jul 6
3:51 PM
Jul 13
10:48 AM
Jul 20
3:52 AM
Jul 28
4:20 AM
Current Condition X-ray Solar Flares

Speed: 361.4 km/sec
Density: 4.3 proton/cm3
More Data: ACE, DSCOVR

Explanation | More Data
Updated: Jul 02 at 0221 UT

***The sun is blank-- no sunspots.

Credit: Solar Dynamics Observatory(SDO)/Helioseismic
and Magnetic Imager (HMI).
Daily Sun: 01 July 18
6-hr max: A2 2140 UT Jul 01
24-hr: A2 2140 UT Jul 01
Explanation | More Data

Jul 01 at 2359 UT
Time (PST) of rise and set of some planets at 10-day interval
Rise Set Rise Set Rise Set Rise Set Rise Set
Jul 10 7:30 AM 8:11 PM 8:39 AM 9:11 PM 7:55 PM *7:10 AM 1:42 PM *1:17 AM 5:27 PM *4:44 AM
Jul 20 7:24 AM 7:53 PM 8:45 AM 9:07 PM 7:08 PM *6:21 AM 1:03 PM *12:38 AM 4:44 PM *4:02 AM
Jul 30 6:48 AM 7:11 PM 8:50 AM 9:01 PM 6:19 PM *5:30 AM 12:26 PM 11:57 PM 4:03 PM *3:20 AM

* = following day
Astronomical Events July 2018
Partial Eclipse of the Sun

A Partial Solar Eclipse will occur on July 13. However, it will not be visible in the Philippines. The eclipse will begin at exactly 9:48 A.M. (Philippine Standard Time). It is visible in the tip of Wilkes Land in Antarctica and the southernmost part of Australia.

Total Eclipse of the Moon

A Total Lunar Eclipse will occur on July 28 and will be visible in the Philippinesas shown in Figures 1 & 2. The entire event will be seen in Antarctica, Australasia, Asia, Russia except North, Africa, Europe and East of South America.

The eclipse will begin at 1:13 A.M. Philippine Standard Time (PhST) and will end at 7:30 A.M. (PhST), July 28.

In Manila, the Moon will rise at 6:05 P.M. on 27 July and will set at 5:44 A.M. on 28 July. The major phases of the eclipse are as follows:
Phase Time
Penumbral eclipse begins: 1:13 AM (PhST)
Partial eclipse begins: 2:24 AM (PhST)
Greatest eclipse: 4:21 AM (PhST)
Partial eclipse ends: 6:19 AM (PhST) *unobservable
Penumbral eclipse ends: 7:30 AM (PhST )*unobservable

Lunar eclipses are safe to watch and observers need not use any kind of protective filters for the eyes. A pair of binocular will help magnify the view and will make the red coloration of the Moon brighter.
Figure 1
(click to view image)
Figure 2
(click to view image)

Meteor Shower

The Southern Delta Aquarids meteor shower will be best observed on the east southeastern sky from July 28 to 31 and estimated to peak before midnight and onward on July 29/30. These are part of a complex of radiants in Aquarius, Capricornus and Piscis Austrinus, all of which combine with sporadic and early Perseid activity to provide a nice display of meteors in late July. The stream normally produces about 5-10 meteors/hour with overall activity of about 15 meteors/hour under good sky conditions. Unfortunately, the bright Moon will interfere the activity. Figures 4 & 4a show the position of the constellation Aquarius-the Water Bearer, where the radiant will originate.
Figure 4
(click to view image)
Figure 4a
(click to view image)
Stars and Constellations
Stargazers will be having a nice time watching the night sky with the famous Summer Triangle of the stars Vega, Deneb and Altair of the constellations Lyra, Aquila and Cygnus, respectively, being well placed in the eastern horizon, as shown in Figures 3 & 3a.

Also shown in Figure 3a are well known constellations such as Ophiuchus – the Serpent Holder, Scorpius – the Scorpion, and Sagittarius – the Archer.
Figure 3
(click to view image)
Figure 3a
(click to view iamge)
Planets Whereabout
On July 1 at 3:00 A.M., Uranus and Neptune will be observed at about 28 and 59 degrees above the eastern horizon, with magnitudes of +5.8 and +7.8, respectively. Neptune will lie among the background stars of the constellation Aquarius, the Water-Bearer, while Uranus lurks among the background stars of the constellation Pisces, the Fish. Observing Neptune and Uranus requires a binocular or a telescope and a starmap under dark and clear sky condition.

Planets Saturn and Mars will also be observed at about 29 and 51 degrees above the western part of the horizon and will abode among the background stars of the constellations Sagittarius, the Archer and Capricornus, the Sea-Goat, glowing at magnitudes of +0.0 and -2.2, respectively. Viewing through a telescope, the Ringed Planet will show its disk and rings at 17.8 and 41.5 seconds of an arc in diameter, respectively. The Saturn system holds more than 60 satellites or moons, of which seven (7) glow brightly enough to show through moderate-aperture telescopes. Saturn’s Titan, its largest and brightest satellite, which shines at magnitude +8.4 can be easily seen through any optical instrument. It orbits Saturn once every 16 days. The Red Planet Mars’ satellites, Phobos and Deimos need larger aperture telescope to be observed.

On the same date at 7:00 P.M., Mercury and Venus will be observed above the western part of the horizon, shining brightly at magnitudes -0.10 and -4.1, respectively. Mercury will be found dwelling among the background stars of the constellation Cancer, the Crab, while Venus will lie among the background stars of the constellation Leo, the Lion.

Figure 5 shows how to compare apparent magnitudes of celestial bodies such as planets and stars.
Figure 5
(click to view image)

July 2018
7 Uranus 5° N of Moon 10:00 PM
10 Venus 1.1° N of Regulus 4:00 AM
10 Aldebaran 1.1° S of Moon (occn.) 6:00 PM
13 Partial Eclipse of the Sun (not visible in the Philippines) 9:48 AM
13 Moon at perigee
(nearest distance to Earth = 357,538.502 km)
4:25 PM
15 Mercury 2° S of Moon 6:00 AM
17 Moon at apogee
(farthest distance from Earth = 406,185.857 km)
1:44 PM
(visible in the Philippines
(Manila Time)
4:21 AM
28 Mars 7° S of Moon 6:00 AM