Astronomical Diary
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Last Quarter New Moon First Quarter Full Moon
Jan 17
8:58 PM
Jan 25
5:42 AM
Jan 3
12:45 PM
Jan 11
3:21 AM
Current Condition X-ray Solar Flares

Speed: 302.5 km/sec
Density: 5.6 protons/cm3
More Data: ACE, DSCOVR

Explanation | More Data
Updated: Jan 02 at 0052 UT

***A new sunspot is emerging at the circled location.
It's high latitude and magnetic polarity identify as a
member of Solar Cycle 25.

Credit: Solar Dynamics Observatory(SDO)/Helioseismic
and Magnetic Imager (HMI).
Daily Sun: 01 Jan 2019
6-hr max: A9 2337 UT Jan01
24-hr: A9 2337 UT Jan01

Explanation | More Data

Updated: Jan 02 at 0000 UT
Time (PST) of rise and set of some planets at 10-day interval
Rise Set Rise Set Rise Set Rise Set Rise Set
Jan 01 6:00 AM 5:11 PM 8:43 AM 8:09 PM 3:19 AM 2:42 PM 6:08 AM 5:21 PM 7:09 AM 6:25 PM
Jan 11 6:30 AM 5:43 PM 8:47 AM 8:22 PM 3:10 AM 2:29 PM 5:38 AM 4:51 PM 6:35 AM 5:51 PM
Jan 21 6:57 AM 6:19 PM 8:48 AM 8:33 PM 3:00 AM 2:16 PM 5:09 AM 4:22 PM 6:00 AM 5:17 PM
Jan 31 7:19 AM 6:54 PM 8:47 AM 8:43 PM 2:51 AM 2:05 PM 4:39 AM 3:52 PM 5:26 AM 4:43 PM

* = following day
Astronomical Events January 2020
Meteor Shower

The annual Quadrantid meteor shower will be active from 01–07 January. The observation of its peak activity is on 03–04 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 a rate of about 40 kilometers per second. The incinerated dusts are said to be particles apparently derived from the debris ejected by the near-Earth asteroid 2003 EH.
Figure 2
Figure 2a
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 supergiant 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.
Figure 1
Figure 1a
Planets Whereabout
On 03 January, at 5:00 AM, Mars, will be observed at about 23 degrees above the east southeastern horizon, shining at magnitude +1.60. The Red Planet will be residing among the background stars of the constellation Libra, the Scales in the first week of the month. It will be traversing the sky and will settle among the stars of the constellation Scorpius, the Scorpion throughout the month.

At 6:30 PM, Venus, and Neptune will be found at about 22, and 50 degrees above the west southwestern horizon. Venus will be shining brilliantly at magnitude -4.0, while Neptune will be feebly dimming at magnitude 7.92. Also, Uranus will be located at about 83 degrees above the east southeastern horizon and will be glowing at magnitude +5.75. Observing Uranus and Neptune will require a modest-sized telescope, a star map, and a clear sky condition.

Mercury, Jupiter, and Saturn will be difficult to observe during the month due to their proximity to the Sun. Jupiter will return to view and will be found low in the east southeastern sky about an hour before sunrise during the last week of January.

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

2 Moon at apogee (farthest distance to Earth = 404,507.696 km) 9:30 AM
10 Mercury at super conjunction 11:00 PM
11 Penumbral Lunar Eclipse 1:05 AM
13 Saturn at conjunction 10:00 PM
14 Moon at perigee (nearest distance to Earth = 366,019.832 km) 4:21 AM
30 Moon at apogee (farthest distance to Earth = 405,329.931 km) 5:27 AM