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In the Sky this Week- October 10, 2017

By Robert Trembley  |  10 Oct 2017

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This entry is part 64 of 253 in the series In the Sky This Week

Moon in southern sky Oct. 10, 2017

The waning gibbous Moon is high in the southern sky before dawn; The Moon will be at third quarter on the 12th, traveling eastward and a bit lower each morning, it will be a waning crescent from the 13th through the 19th.

Moon in southern sky Oct. 10, 2017 Moon in southern sky Oct. 10, 2017. Credit: Stellarium / Bob Trembley.

The Moon will occult the star Regulus before sunrise on Oct. 15th.

Simulation of the Moon blocking the star Regulus The Moon occults the star Regulus before dawn on Oct. 5th. Credit: Stellarium / Bob Trembley.
Occultation OF ZC1487 (Regulus) on 15 Oct. 2017

For a map and timing of the occultation for your location, click this link.

Venus and Mars continue to appear close together, low in the eastern predawn sky. The Moon will appear very close to Mars on the morning of Oct. 17th.

The Moon in the eastern predawn sky Oct. 17, 2017 The Moon in the eastern predawn sky Oct. 17, 2017. Credit: Stellarium / Bob Trembley.

On October 14th, asteroid 2012 TC14 will pass by the Earth at 0.13 Lunar Distances – that’s WELL inside Earth’s geosynchronous satellite ring; the asteroid is estimated to be 8-26 meters in diameter. Earth’s gravity will bend the orbit of the asteroid as it passes by.

There are currently no sunspots visible from Earth, but the coronal hole that has been hanging around for the last couple weeks, now appears to have formed an island!

The Sun's Corona The Sun’s Corona – Oct. 10, 2017 – Atmospheric Imaging Assembly (AIA) 211 angstroms. Image courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.

Each year, NASA’s Goddard Space Flight Center creates a Solar Dynamics Observatory “best of” video, and the year 6 video is spectacular! I made the following comment to the video on YouTube: “I have never seen a better video showing the fluid-dynamic nature of the Sun’s differential rotation. It’s really neat to see the “>>>” patterns form (and the things IN them) as the Sun rotates. This will be included as part of my Sun lecture.”

Uranus is high in the eastern sky a few hours after sunset; at the recent Astronomy at the Beach event in Michigan, a young girl commented that Uranus was the coolest thing she saw that evening!

Uranus high in the eastern sky Uranus is high in the eastern sky after sunset. Credit: Stellarium / Bob Trembley.

The Inner Solar System

The Inner Solar System The Inner Solar System, Oct. 10, 2017, looking out towards Jupiter and Saturn. Credit: NASA Eyes on the Solar System / Bob Trembley.
Looking out towards Uranus and Neptune from the Inner Solar System The Inner Solar System, Oct. 10, 2017, looking out towards Uranus and Neptune. Credit: NASA Eyes on the Solar System / Bob Trembley.

Apps used for this post:

Stellarium: a free open source planetarium app for PC/MAC/Linux.
NASA Eyes on the Solar System: an immersive 3D solar system and space mission app – free for the PC /MAC.

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