Astronomical Diary
MOON PHASES
lastquarterjpg newmoonjpg firstquarterjpg fullmoonjpg
Last Quarter New Moon First Quarter Full Moon
Feb 16
6:17 AM
Feb 23
11:32 PM
Feb 2
9:42 AM
Feb 9
3:33 PM
SPACE WEATHER
Current Condition X-ray Solar Flares
SOLAR WIND

Speed: 373.5 km/sec
Density: 4.2 protons/cm3
More Data: ACE, DSCOVR

Explanation | More Data
Updated: Feb 02 at 0012 UT

***Departing sunspot 2757 is a member
of old Solar Cycle 24.

Credit: Solar Dynamics Observatory(SDO)/Helioseismic
and Magnetic Imager (HMI).
Daily Sun: 02 Feb 2020
DSun

Explanation | More Data

Updated: Jan 30 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
Feb 10 7:25 AM 7:13 PM 8:45 SM 8:51 PM 2:42 AM 1:55 PM 4:08 AM 3:22 PM 4:51 AM 4:09 PM
Feb 20 6:50 AM 6:43 PM 8:42 AM 8:59 PM 2:33 AM 1:45 PM 3:37 AM 2:52 PM 4:16 AM 3:34 PM
Astronomical Events February 2020
National Astronomy Week

The National Astronomy Week (NAW) is an annual event being observed every third week of February by virtue of Presidential Proclamation No.130, s. 1993. This year, the occasion will be celebrated on 16–22 February 2020 with the theme “A New Decade of Opportunity in Philippine Astronomy” as shown in attachment 1.
Attachment1
Attachment 1
Stars and Constellations
The famous equilateral triangle in the sky, known as the Winter Triangle will be located at about 50 degrees above the eastern horizon in the early evening, as shown in Figures 1 & 1a. It will be visible throughout the month. The Triangle is composed of Betelgeuse, the super giant red star and the prominent star of the famous constellation Orion (the Mighty Hunter), Sirius, the brightest star in the sky of the constellation Canis Major (the Big Dog), and Procyon, the brightest star of the constellation Canis Minor (the Little Dog).

The constellation of Gemini, the Twin will also be found to the left of the Winter Triangle, with its two prominent stars Castor and Pollux, which represents the head of the Twin. The constellation of Cancer, the Crab will be found 15 degrees below Gemini.

The Beehive Cluster, also known as Praesepe (Latin for "manger"), M44, NGC 2632, or Cr 189, is an open cluster of stars in the constellation of Cancer, the Crab. The Cluster is an excellent target for naked-eye and binocular observers under dark and cloudless sky condition as shown in Figure 1 & 1a. It is one of the nearest open clusters to the Solar System, and it contains a larger star population than most other nearby clusters. The Beehive Cluster looks like a nebulous object to the naked eye; thus it has been known since ancient times. The classical astronomer Ptolemy called it "the nebulous mass in the breast of Cancer," and it was among the first objects that Galileo studied with his telescope.

The Winter Circle or sometimes called the Winter Hexagon is an asterism composed of a large star configuration made of six brilliant winter stars: Rigel, Aldebaran, Capella, Procyon, Sirius and Pollux. The stars that make-up the Winter Hexagons are the brightest stars in their constellation. These stars include Rigel, the brightest star in the constellation Orion; Aldebaran, in the constellation Taurus; Capella in the constellation Auriga; Pollux in the constellation Gemini; Procyon in the constellation Canis Minor and Sirius in the constellation Canis Major. The Winter Hexagon can be found in the eastern sky in early evening about an hour after sunset and then sets into the western sky by midnight as shown in Figures 2 & 2a.

Figure 3 shows the hand method on how to calculate angular measurement in degrees across the sky.
Fig1
Figure 1
Fig1a
Figure 1a
Fig2
Figure 2
Fig2a
Figure 2a
Fig3
Planets Whereabout
On 01 February, at 5:30 AM, Mars, Jupiter, and Saturn will be located at 33, 12 and 4 degrees above the east southeastern horizon and will be shining at magnitudes +1.40, -1.90 and +0.60, respectively. The Red planet will lie among the background stars of the constellation Ophiuchus, the Serpent Holder, while the two largest gas giant planets will abode among the stars of the constellation Sagittarius, the Archer. The planets will be good targets for astronomical observations and astrophotography under clear and dark sky conditions. They will be visible throughout the month almost an hour before sunrise.

On 02 February, at 6:30 PM, Mercury, Neptune, and Venus will be found at about 12, 25 and 31 degrees above the west southwestern horizon with magnitudes -1.00, -4.10, and +7.95 and will lie among the background stars of the constellation Aquarius, the Water-Bearer, respectively. Uranus will also be located at about 70 degrees above the west southwestern horizon and will be glowing at magnitude +5.80. Observing Uranus and Neptune will require a modest-sized telescope, a star map, and a clear sky condition.

Figure 4 shows how to compare apparent magnitudes of celestial bodies such as planets and stars.
Fig4
Figure 4

FEBRUARY 2020
DATE EVENT TIME (PhST)
10 Mercury at greatest elongation: 18.2° E 10:00 PM
11 Moon at perigee (nearest distance to Earth = 360,553.415 km) 4:28 AM
18 Moon – Mars 0.8° S 9:00 PM
20 Moon – Jupiter 1° N 4:00 AM
20 Moon – Saturn 1.9° N 10:00 PM
26 Moon at apogee (farthest distance to Earth = 406,231.135 km) 7:34 PM
27 Moon – Venus 7° N 8:00 PM