In the Sky This Week – November 20, 2018
Venus and Spica continue their weeks-long conjunction in the eastern predawn sky.
Conjunction of Venus and the star Spica in the predawn sky, Nov. 20, 2018. Credit: Stellarium / Bob Trembley.
Orion and Canus Major are in the southwestern predawn sky all week. A few months ago, I remember writing about Orion just becoming visible in the eastern predawn sky; watching constellations creep across the southern sky over the course of a season is pretty interesting. I'm certainly learning a lot about the sky from writing these posts...
Saturn becomes the "evening star" in the southwestern sky at dusk; if you're lucky, and have a clear horizon, you might catch a glimpse of Mercury very low in the sky around 5:30 PM ET on Nov. 20th.
Saturn is now the "evening star" in the southwest, and Mercury is low near the horizon at dusk on Nov. 20, 2018. Credit: Stellarium / Bob Trembley.
Mars and Neptune will be high in southern sky after sunset all week.
Mars and Neptune are high in the southern sky after sunset on Nov. 20, 2018. Credit: Stellarium / Bob Trembley.
Here's a close-up of where Neptune is near the red giant star Lambda Aquarii (λ-Aqr , 73 Aqr):
Close-up of the location of Neptune and Mars on Nov. 20, 2018. Credit: Stellarium / Bob Trembley.
Uranus is above the Moon! Yea, I said it! Actually, when generating images for this post, this image made me laugh pretty hard... Uranus will appear above the waxing gibbous Moon in the eastern sky after sunset on Nov. 20th.
Uranus is above the Moon in the eastern sky after sunset on Nov. 20, 2018. Credit: Stellarium / Bob Trembley.
The full Moon appears very near the star Aldebaran after sunset on Nov. 23rd.
Conjunction of the Moon and Aldebaran after sunset, Nov. 23, 2018. Credit: Stellarium / Bob Trembley.
Observing Target: NASA TV - Mars InSight Landing
Artist concept of InSight landing on Mars. Credit: NASA/JPL-Caltech.
Mars InSight is the first robotic mission to study the "inner space" of Mars: its crust, mantle, and core. InSight will land on Mars on Monday Nov. 26th at 2:55 PM ET; NASA is using the media to highlight the event, with a press kit, landing events, and live broadcasts on NASA TV and YouTube.
The public can experience what it’s like to open InSight’s solar panels and place instruments on the Martian surface after landing in a special web interactive available at https://eyes.nasa.gov/insight/
Experience InSight - An Interactive Web Activity
The Moon
The Moon is a waxing gibbous, heading towards full on the 23rd, where it will be visible all night long. After the 23rd, the Moon will be a waning gibbous.
The Moon from Nov. 20-26, 2018. Visualizations by Ernie Wright.
The Sun
What's left of sunspot AR2727 is decaying and rotating out of view:
Decaying Sunspot AR2727 Nov. 20, 2018- left: SDO/HMI Quick-Look Continuum, right: SDO/AIA 211, 193, 171 angstroms. Images courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
Coronal holes remains open at both poles; coronal activity associated with AR2727 can be seen on the right of the animation below. Some coronal loop activity can be seen rotating into view on the left of the animation below. SpaceWeather.com says "Today, a minor stream of solar wind is brushing against Earth's magnetic field, causing geomagnetic unrest and intermittent auroras around the Arctic Circle. The action of this solar wind stream should continue for another ~24 hours."
Prominences appear to be short-lived for the last couple days... not that I've been able to see any - living here in Mordor Michigan, the clouds have broken only for a few moments in the last several days.
Update: Early this morning, I brushed snow off the car before my wife left for school; as I was pouring the last cup of coffee from the pot, I noticed the sky to the east is a brilliant blue! NO CLOUDS! I rushed to the south window and looked out... mmrph... clouds... But, hey - first blue I can remember in days!
The solar wind speed is 415.2 km/sec, with a density of 9.0 protons/cm3.
Animated LASCO C2 Coronograph showing the solar corona above the Sun's limb (the white circle).
You can create your own time-lapse movies of the Sun here: AIA/HMI Browse Data.
You can browse all the SDO images of the Sun from 2010 to the present here: Browse SDO archive.
Asteroids
Upcoming Earth-asteroid encounters:
Woo-HA! Look at 2018 WG, passing within 0.1 Lunar Diameters on Nov. 16th!
Close Pass of 2018 WG, Nov. 16, 2018. Credit: JPL Small Body Database Browser/Bob Trembley
| Asteroid |
Date(UT)
|
Miss Distance
|
Velocity (km/s)
|
Diameter (m)
|
| 2018 VO3 |
2018-Nov-14
|
4.1 LD
|
7.7
|
15
|
| 2018 VX5 |
2018-Nov-14
|
3.6 LD
|
8.3
|
26
|
| 2018 VK1 |
2018-Nov-14
|
10.2 LD
|
2.3
|
12
|
| 2018 VW4 |
2018-Nov-14
|
9.8 LD
|
12.5
|
45
|
| 2018 VD7 |
2018-Nov-14
|
9.1 LD
|
11
|
26
|
| 2018 VR8 |
2018-Nov-14
|
18.9 LD
|
12.3
|
28
|
| 2018 VQ8 |
2018-Nov-14
|
18 LD
|
9.7
|
37
|
| 2018 VJ10 |
2018-Nov-14
|
0.5 LD
|
13.5
|
7
|
| 2007 UL12 |
2018-Nov-15
|
16.4 LD
|
25.8
|
235
|
| 2018 VV7 |
2018-Nov-15
|
12.2 LD
|
8.3
|
21
|
| 2018 VT8 |
2018-Nov-16
|
10.3 LD
|
6.2
|
58
|
| 2018 WH |
2018-Nov-16
|
0.5 LD
|
7.8
|
4
|
| 2018 WG |
2018-Nov-16
|
0.1 LD
|
11.8
|
5
|
| 2018 VS8 |
2018-Nov-17
|
2 LD
|
9.2
|
13
|
| 2018 VT4 |
2018-Nov-18
|
11.1 LD
|
4.4
|
18
|
| 2018 VH10 |
2018-Nov-18
|
4.4 LD
|
14
|
35
|
| 2018 WF |
2018-Nov-18
|
6.8 LD
|
10.6
|
18
|
| 2018 WE |
2018-Nov-18
|
0.6 LD
|
12.8
|
8
|
| 2018 WQ |
2018-Nov-19
|
10.9 LD
|
7.5
|
22
|
| 2018 WC |
2018-Nov-19
|
15.2 LD
|
19.9
|
86
|
| 2018 WJ |
2018-Nov-19
|
0.3 LD
|
18.7
|
11
|
| 2018 VQ6 |
2018-Nov-20
|
11.4 LD
|
7.9
|
21
|
| 2018 VP7 |
2018-Nov-20
|
7.7 LD
|
5.7
|
17
|
| 2018 WD |
2018-Nov-24
|
4.5 LD
|
13.6
|
54
|
| 2009 WB105 |
2018-Nov-25
|
15.2 LD
|
18.9
|
71
|
| 2018 VT7 |
2018-Nov-25
|
8.2 LD
|
2.3
|
10
|
| 2008 WD14 |
2018-Nov-27
|
7.4 LD
|
9.3
|
93
|
| 2001 WO15 |
2018-Nov-28
|
13.6 LD
|
11.7
|
107
|
| 2018 VE4 |
2018-Nov-30
|
15 LD
|
4.8
|
30
|
| 2018 WN |
2018-Dec-01
|
14.9 LD
|
4.4
|
17
|
| 2018 TG6 |
2018-Dec-02
|
3.9 LD
|
1.4
|
13
|
| 2013 VX4 |
2018-Dec-09
|
4.1 LD
|
6.6
|
65
|
| 2001 XG1 |
2018-Dec-10
|
7.9 LD
|
14.2
|
78
|
| 2018 VX6 |
2018-Dec-10
|
16.5 LD
|
11.2
|
69
|
| 2015 XX169 |
2018-Dec-13
|
17 LD
|
5.8
|
12
|
| 2018 VO9 |
2018-Dec-15
|
2.6 LD
|
2.9
|
16
|
| 2017 XQ60 |
2018-Dec-21
|
11.3 LD
|
15.6
|
47
|
| 163899 |
2018-Dec-22
|
7.4 LD
|
6.2
|
1232
|
| 418849 |
2018-Dec-23
|
16.6 LD
|
17.6
|
269
|
| 2014 AD16 |
2019-Jan-04
|
12.9 LD
|
9.4
|
12
|
| 2016 AZ8 |
2019-Jan-07
|
11.6 LD
|
9.1
|
224
|
| 2013 YM2 |
2019-Jan-09
|
7.3 LD
|
4.3
|
20
|
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. Table from SpaceWeather.com
Near-Earth objects (NEOs) discovered this month: 171, this year: 1793, all time: 19191.
Potentially hazardous asteroids: 1936 (as of Nov. 20, 2018)
Minor Planets discovered: 789,069 (as of Oct. 30, 2018)
Fireballs
On Nov. 19, 2018, the NASA All Sky Fireball Network reported 96 fireballs - WOW!
(48 Leonids, 42 sporadics, 5 Northern Taurids, 1 November omega Orionid)
In this diagram of the inner solar system, all of the fireball orbits from Nov 19, 2018 intersect at a single point--Earth. Source: Spaceweather.com
The Solar System
This is the position of the planets and a couple spacecraft in the solar system; The Parker Solar Probe has almost recrossed the orbit of Mercury after perihelion 1, and Mars InSight will land on Mars on Monday Nov. 26th, at 2:55 PM ET.
Position of the planets in the inner solar system, Nov. 20, 2018. Credit: NASA Eyes on the Solar System / Bob Trembley.
Spacecraft
Parker Solar Probe
What will Parker Solar Probe see in the slow solar wind close to the Sun? We'll find out in two weeks. In the meantime, here's some quasi-informed speculation!https://t.co/FAJ0mJRbzq pic.twitter.com/HQSgkRm6hE
— Mathew Owens (@mathewjowens) November 19, 2018
OSIRIS-REx - 75 miles from asteroid Bennu!
Over the next couple of days, I'll conduct two spins called Sample Mass Measurements. My team will use the results as a baseline to compare with similar spins that I'll perform after TAGing Bennu in order to confirm the mass of the sample collected. https://t.co/jkH5W64e9q pic.twitter.com/QxLqF3ayl0
— NASA's OSIRIS-REx (@OSIRISREx) November 16, 2018
I'm now only about 120 kilometers (75 miles) from #asteroid Bennu and recently completed a test of TAGSAM, my sample collection system. #WhereIsOSIRISREx
More on my progress and recent activities: https://t.co/rACre4nDe4 pic.twitter.com/bczEd7BpjZ
— NASA's OSIRIS-REx (@OSIRISREx) November 19, 2018
Mars InSight - Lands Monday Nov. 26th!
@NASAInSight lands on Mars a week from now, on November 26! InSight will investigate the deep interior of Mars to further our understanding of the rocky planets. Discover more about science of InSight and watch live landing coverage at https://t.co/wV0r9XTQ7n pic.twitter.com/WcICTQHKir
— Night Sky Network (@nightskynetwork) November 19, 2018
Voyager 2 - Almost at the edge of the Sun's Magnetic Influence!
Rumors of Voyager 2's exit from the heliosphere have been greatly exaggerated. Check out the y-axis on this graph. It goes down to 19. We're waiting for a count of near zero heliospheric particles/sec before she's joined me in interstellar space. https://t.co/XVeZIbGO5a pic.twitter.com/6fMJWoUbQ3
— NASA Voyager (@NASAVoyager) November 9, 2018
-Data from the NASA Exoplanet Archive
Apps used for this post:
NASA Eyes on the Solar System: an immersive 3D solar system and space mission simulator - free for the PC /MAC.
I maintain the unofficial NASA Eyes Facebook page.
Stellarium: a free open source planetarium app for PC/MAC/Linux. It's a great tool for planning observing sessions.
2018 is NASA's 60th Anniversary!
Just wanted to say thank you for these post. You can tell you put a ton of time into it. I love using it as my weekly “what’s going on in the world of astronomy.”