Astronomical Diary
MOON PHASES
lastquarterjpg newmoonjpg firstquarterjpg fullmoonjpg
Last Quarter New Moon First Quarter Full Moon
Sep 22
10:41 AM
Sep 29
2:26 AM
Sep 06
11:10 AM
Sep 14
12:33 PM
SPACE WEATHER
Current Condition X-ray Solar Flares
SOLAR WIND

Speed: 655.5 km/sec
Density: 1.6 protons/cm3
More Data: ACE, DSCOVR

Explanation | More Data
Updated: Sep 03 at 0121 UT

***Sunspot AR2748 has a magnetic polarity
that identifies it as a member of old Solar Cycle 24.
It poses no threat for strong solar flares

Credit: Solar Dynamics Observatory(SDO)/Helioseismic
and Magnetic Imager (HMI).
Daily Sun: 02 Sep 2019
DSun
6-hr max: A8 1908 UT Sep 02
24-hr: A8 1908 UT Sep 02

Explanation | More Data

Updated: Sep 02 at 2359 UT
Time (PST) of rise and set of some planets at 10-day interval
DATE MERCURY VENUS MARS JUPITER SATURN
Rise Set Rise Set Rise Set Rise Set Rise Set
Sep 08 6:01 AM 6:19 PM 6:14 AM 6:28 PM 5:39 AM 5:58 PM 12:08 PM 11:23 PM 2:11 PM *1:28 AM
Sep 18 6:33 AM 6:34 PM 6:25 AM 6:29 PM 5:26 AM 5:40 PM 11:33 AM 10:47 PM 1:31 PM *12:49 AM
Sep 28 6:58 AM 6:44 PM 6:37 AM 6:30 PM 5:12 AM 5:21 PM 10:59 AM 10:13 PM 12:52 PM *12:10 AM

* = following day
Astronomical Events September 2019
Equinox
The equinoxes are the only times when the solar terminator (the "edge" between night and day) is perpendicular to the equator. On an equinox, day and night are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the sun and atmospheric refraction.

Autumnal equinox will occur on September 23 at 3:50 PM. Hence, thereafter, Philippine nights will be longer as the Sun moves below the celestial equator towards the southern hemisphere.

Figures 2 and 2a represent the position of the Earth and Sun during Solstices and Equinoxes.
Fig2
Figure 2
(click to view image)
Fig2a
Figure 2a
(click to view image)
Stars and Constellations
Stargazing during the month will give fine display after sunset and before sunrise of celestial bodies such as, stars and constellations. The famous Summer Triangle of the stars Vega, Deneb and Altair of the constellations Lyra, Aquila and Cygnus respectively, is well placed above the eastern horizon, as shown in Figures 1 & 1a. This month, the rich band of constellations and stars along the Milky Way from the constellations Cygnus, the Swan, in the north to Sagittarius and Scorpius in the south, begin to give way to fainter constellations, many of them with watery associations such as the constellations of Capricornus, the Sea Goat, Aquarius, the Water Bearer and Pisces the Fish. The famous asterism Teapot in the sky of the constellation Sagittarius can be observed at about 40 to 45 degrees above the south-southeastern horizon as also shown in the Figures.
Fig1
Figure 1
(click to view image)
Fig1a
Figure 1a
(click to view image)
Planets Whereabout
On September 7 at 6:15 PM, catch a glimpse of Venus as soon as the Sun sets. It can be spotted at 3 degrees above the
western horizon, glowing at magnitude -3.91.

On September 7 at 7:00 PM, Jupiter can be spotted 49 degrees above the south-southwestern sky after sunset, glowing at magnitude -2.18, lying among the background stars of the constellation Ophiuchus, the Serpent Bearer. Meanwhile, Saturn can be spotted 51 degrees above the southeastern sky with magnitude of 0.36, lying among the background stars of the constellation Sagittarius, the Archer. These two planets will remain visible in the evening sky throughout the month.

At 11:00 PM, Uranus and Neptune will be observed at about 30 and 64 degrees above the east-northeastern and southeastern horizon, lying among the background stars of the constellation Aries, the Ram and Aquarius, the Water-Bearer and will be having magnitudes of +5.72 and +7.82, respectively. Both planets will be observable throughout the month. Observing these giant planets will require familiarity with a starmap and a telescope to be able to view its features.

Mercury and Mars will be difficult to observe due to their proximity to the Sun during the month.
Fig3
Figure 3
(click to view image)

SEPTEMBER 2019
DATE EVENT TIME (PhST)
8 Saturn 0.5° N of Moon (occn.) 11:00 pM
13 Moon at apogee
(farthest distance to Earth = 406,340.400 km)
9:32 PM
14 Neptune 4° N of Moon 2:00 AM
18 Uranus 4.5° N of Moon 4:00 AM
23 AUTUMNAL EQUINOX 3:50 PM
28 Moon at perigee (nearest distance to Earth = 357,908.643 km) 10:24 AM