Astronomical Diary
MOON PHASES
lastquarterjpg newmoonjpg firstquarterjpg fullmoonjpg
Last Quarter New Moon First Quarter Full Moon
Jan 28
5:10 AM
Jan 6
9:28 AM
Jan 14
2:46 PM
Jan 21
1:16 PM
SPACE WEATHER
Current Condition X-ray Solar Flares
SOLAR WIND

Speed: 332.6 km/sec
Density: 1.2 protons/cm3
More Data: ACE, DSCOVR

Explanation | More Data
Updated: Jan 03 at 0040 UT

***Sunspot AR2732 is a member of decaying
Solar Cycle 24 and poses no threat for strong solar flares.

Credit: Solar Dynamics Observatory(SDO)/Helioseismic
and Magnetic Imager (HMI).
Daily Sun: 02 Jan 2019
DSun
6-hr max: B1 1838 UT Jan 02
24-hr: B2 0150 UT Jan 02

Explanation | More Data

Updated: Jan 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
Jan 1 5:11 AM 4:26 PM 2:57 AM 2:29 PM 11:13 AM 11:16 PM 4:18 AM 3:34 PM 6:26 AM 5:40 PM
Jan 11 5:38 AM 4:51 PM 3:01 AM 2:28 PM 10:55 AM 11:04 PM 3:47 AM 3:03 PM 5:52 AM 5:06 PM
Jan 21 6:06 AM 5:22 PM 3:08 AM 2:31 PM 10:37 AM 10:52 PM 3:17 AM 2:32 PM 5:18 AM 4:32 PM
Jan 31 6:33 AM 5:57 PM 3:17 AM 2:37 PM 10:20 AM 10:41 PM 2:45 AM 2:00 PM 4:43 AM 3:58 PM

* = following day
Astronomical Events January 2019
Meteor Shower

The annual Quadrantid meteor shower will be active from January 1-7. The observation of its peak activity is on 3-4 January in which, meteors or “falling stars” can be seen at the rate of at least 40 meteors per hour. The shower will appear to radiate from the constellation of Bootes, as shown in Figures 2 & 2a. The Quadrantid meteor shower hits the Earth’s atmosphere at the rate of about 40 kilometers per second. The incinerated dust are said to be particles apparently derived from the debris ejected by the near-Earth asteroid 2003 EH.
Fig2
Figure 2
(click to view image)
Fig2a
Figure 2a
(click to view image)
Stars and Constellations
The famous equilateral triangle in the sky, known as the Winter Triangle rises after sunset. 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) as shown in Figures 1 & 1a.
Fig1
Figure 1
(click to view image)
Fig1a
Figure 1a
(click to view image)
Planets Whereabout
On 01 January, at 5:30 AM, Venus, Jupiter and Mercury together with the waning crescent Moon will be found at about 38, 16, 8 and 45 degrees above the east southeastern horizon shining brightly at magnitudes -4.5, -1.8 and -0.4, respectively. This conjunctions of astronomical bodies will be a good target for observations and astrophotography under a dark and cloudless sky condition. On the 2nd day of the month, Venus will be too close to the south of the waning crescent Moon and becomes a nice target for documentation purposes.

At 9:00 PM, Neptune, Mars and Uranus will be observed, standing at about 16, 32 and 60 degrees above the west southwestern horizon with magnitudes +7.9, +0.4 and +5.7, respectively. Neptune will lie among the stars of the constellation Aquarius, the Water-Bearer while Mars and Uranus will abode among the stars of the constellation Pisces , the Fish. Observing the giant planets will require a binocular or a telescope and a starmap under dark and clear sky condition.

On the middle of the month, Saturn returns to view as it rises gradually on the east southeastern horizon an hour before sunrise as days pass by. The planet will not be an easy target for observation due to its low position in the sky during the month.

Figure 3 shows how to compare apparent magnitudes of celestial bodies such as planets and stars.

Figure 3
(click to view image)

January 2019
DATE EVENT TIME (PhST)
2 Venus 1.3° South of Moon 6:00 AM
3 Earth at perihelion 1:00 PM
9 Moon at apogee (farthest distance to Earth = 406,114 km) 6:00 AM
11 Pluto in conjunction with the Sun 8:00 PM
12 Mars 8° North of Moon 9:00 PM
14 Uranus 5° North of Moon 8:00 PM
16 Venus 8° North of Antares 5:00 AM
22 Moon at perigee (nearest distance to Earth = 357,344 km) 4:00 AM