Notice of Next Meeting

Our next monthly meeting takes place on:

  • Date: Wednesday 8 March 2017
  • Time: 19h30
  • Location: Jhb. Observatory
  • Presenter: TBA
  • Topic: TBA
  • Donation: R10 pp for tea and snacks

Meetings generally last about one and a half hours, and include a Beginners Corner, Topic of Interest, What’s Up in the Night Sky, and the Main Speaker’s Presentation. Tea and coffee are served afterwards. Visitors are welcome.

Click here for directions and a map to the Observatory

Braai and Sky

Our next monthly Braai takes place on:

CANCELLED POOR WEATHER

  • Date: Sunday 26 February 2017
  • Time: 16h30
  • Location: Jhb. Observatory, Top of the hill at the Herbert Baker Library. Map.
  • Topic: Whats Up – a detailed overview af some objects.
  • Donation: R20 pp for the fire wood. Children under 15 free.

Agenda:

  • 16h30  – Arrival and Fires started
  • 17h00 – Braai
  • 18h00 –  Presentation
  • 18h20 – 10 min Break
  • 18h30 – Viewing
  • 20h00 –  close domes and lock up.

Our fire glows warmly with a spirit of friendship settling to waft delicious aromas that pervade the olfactory nerves, creating intense appeal for taste buds.

Read More.

The murmering and chuckling displays delight, comfort and contemplative joy at what will be seen in the sky tonight. Bursts of joyous laughter bring one back to the chatter and fun of the evening. Do join ASSA JHB on the hill for a lovely evening of sky and braai. Dress warmly, bring along your meat to braai, your condiments, drinks and salads, anything you need for your meal, hmm… fingers were invented before knives and forks? and  oops, do not forget a chair or ‘situpon’. You may bring your own telescope if you want to.

Events

Public Viewing Evenings:

  • Jan –
  • Feb –
  • Mar –
  • Apr –
  • May –
  • Jun –
  • Jul –
  • Aug –
  • Sep –
  • Oct –
  • Nov –

Public Viewing Evenings take place at the Observatory – click here for directions and a map to the Observatory.

Please follow @JoosteJerome on Twitter or visit our Facebook page at https://www.facebook.com/assajhb for confirmation

In the Night Sky

In the Night Sky for February 2017

There is never a dull moment when one has open clear night skies and for us in Gauteng, those long nights will soon be upon us, hopefully, with no cloud.

February, holds a delightful surprise, on the 11th. there is a lunar eclipse! It is a Penumbral Lunar Eclipse, which means, the Earth’s shadow misses the moon. Check our weather and set your sights on the moon.

A double surprise? There is an Annular Solar Eclipse on the 26th. The total face of theis eclipse will be visible from a narrow path stretching from the southern tip of South America to southern and western Africa. It will be partially visible from Johannesburg. So, weather permitting get ready for some sunny fun on the 26th.

Asteroid Vesta is visible in binoculars this month. There is the occultation of Regulus in Leo by the moon on the 11th.

Keep watching the skies in February for a lot of fun up ahead!

 

 

Moon Phases:

Universe Today

Welcome back to Constellation Friday! Today, in honor of the late and great Tammy Plotner, we will be dealing with [...]

Fri, Feb 24, 2017
Source: Universe Today

30 years ago today, a supernova explosion was spotted in the southern hemisphere skies. The exploding star was located in [...]

Fri, Feb 24, 2017
Source: Universe Today

     Space.com

A new feature length documentary about the NASA team that guided the early astronauts into space and onto the moon [...]
Fri, Feb 24, 2017
Source: SPACE.COM
World View Enterprises, a private company that plans to sell balloon rides to the edge of space, has announced the [...]
Fri, Feb 24, 2017
Source: SPACE.COM

Astronomy.com

Astronomers commemorate one of the brightest supernovae in 400 years with new images and models of this stellar remnant. [...]
Fri, Feb 24, 2017
Source: Astronomy.com
Even without an obvious power source, this huge nebula is helping astronomers trace the invisible matter that spans our universe.
[...]
Thu, Feb 23, 2017
Source: Astronomy.com

APOD

What's happening to the rings of Saturn?

What's happening to the rings of Saturn?


[...]
Source: APOD
NGC 3621: Far Beyond the Local Group

NGC 3621: Far Beyond the Local Group


[...]
Source: APOD

Facebook

Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, February 24th, 2017 at 9:05am
HI all

Unfortunately the Braai and Sky for Sunday 26 Feb is CANCELLED due the consistently poor weather conditions.

Regards

Jerome
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a link.Wednesday, February 22nd, 2017 at 4:43pm
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, February 17th, 2017 at 11:11am
Public Viewing:
17 Feb 2017

CANCELLED
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreWednesday, February 8th, 2017 at 3:34pm
ASSJHB Monthly Meeting

Speaker : Brian Fraser
Topic : A most important discovery in the field of meteoritics.
Venue: Auditorium
Time : 19h30
Date : 8 February 2017

Johannesburg Observatory
18A Gill Street
Observatory
Johannesburg

Jerome Jooste
Chairman ASSAJHB
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, February 7th, 2017 at 12:05pm
The meeting will take place as scheduled on 8 February and not 10 February as indicated in the earlier post.

Speaker : Brian Fraser
Topic : A most important discovery in the field of meteoritics.
Venue: Auditorium
Time : 19h30
Date : 8 February 2017

Johannesburg Observatory
18A Gill Street
Observatory
Johannesburg

Jerome Jooste
Chairman ASSAJHB
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreMonday, February 6th, 2017 at 8:22pm
Ephemeris for 45P covering 9 - 25 Feb 04h00 SAST.

Azi - South = 0 deg
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreMonday, February 6th, 2017 at 6:51pm
GREEN COMET APPROACHES EARTH: A small comet named "45P/Honda-Mrkos-Pajdusakova" (45P for short) is approaching Earth. At closest approach on Feb. 11th, the comet will be 7.4 million miles from our planet, visible in binoculars and small telescopes. This is what it looks like:

Michael Jäger of Stixendorf, Austria, took the picture on Dec. 31, 2016, just as the comet was swinging around the sun en route to Earth. Since then 45P's icy nucleus has been heated by solar radiation, causing it to spew brightening jets of gas into the comet's green atmosphere. Why green? Because the comet's vaporizing nucleus emits diatomic carbon, C2, a gas which glows green in the near-vacuum of space.

According to the Minor Planet Center, this is the 8th closest pass of any comet in the modern era (since ~1950, when modern technology started being used to study comets). It will only be 31 times farther from Earth than the Moon. Interestingly, 45P made an even closer approach on its previous orbit (23 lunar distances), so it is also on the list as the 5th closest.
Proximity makes the comet bright despite its small size. Forecasters say 45P could be on the verge of naked eye visibility (6th magnitude) when it emerges into the pre-dawn sky later this week. The best time to look is during the dark hours before sunrise between Feb 9th and 12th. The comet will be racing through the constellation Hercules high in the eastern sky. Sky maps: Feb. 9, 10, 11, 12.

From Space weather.com
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared Tech Insider's video.Wednesday, February 1st, 2017 at 5:55am
Astronomy - ASSA Johannesburg Centre
Tech Insider
NASA released the most detailed images of Saturn's rings ever taken — and they’re stunning.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSunday, January 29th, 2017 at 10:38pm
SAAO 74inch Radcliffe Telescope and the HIPPO photopolarimeter solve the riddle of AR Scorpii fast pulsations.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSunday, January 29th, 2017 at 11:05am
Braai and Sky CANCELLED.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSaturday, January 28th, 2017 at 1:55pm
ASSAJHB makes our first three asteroid discoveries for 2017. Well done Dave Blane and Craig Ayres.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, January 10th, 2017 at 10:31pm
Two new Galaxy Zoo Research Projects started today. One is looking for unusual Clumpy Galaxies and the other is analyzing the spectra of Young Active Galaxies. Both projects are "sort of under beta testing" but all data is of the highest integrity and all of your results will be used.
The weather in Jhb is so poor that joining these two projects makes sense.

GALAXY NURSERIES
With the WISPS survey, the Hubble Space Telescope scans regions of the sky searching for young galaxies at different epochs in the history of the Universe. These galaxies can be identified from their spectra. By measuring a galaxy's emission features, we can determine which galaxies are young, alive, and actively forming stars. Currently computers aren't very good at telling the difference between the real and bogus detections. You can help improve our understanding of young galaxies and improve detection algorithms by classifying detections as real or bogus.
www.zooniverse.org/projects/hughdickinson/galaxy-nurseries

CLUMP SCOUT
Galaxies with clumpy structure are uncommon in the local Universe, but we've found a few and we'd love to find more! One of the big questions in galaxy evolution is why there are so few clumpy galaxies in the local Universe when they were so common in past. Since nearby galaxies are easier to study than galaxies further
away, by finding a larger sample we can hope to answer that and other questions.
www.zooniverse.org/projects/highzgal/galaxy-zoo-clump-scout
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, January 10th, 2017 at 11:49am
Here's a little something for the variable star observers to keep tabs on over the next few years.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, January 10th, 2017 at 11:08am
ASSAJHB PLEASE NOTE!!!! The ASSAJHB monthly meeting for 11 January 2017 has been CANCELLED. SAASTA offices are closed until 16 January.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, December 20th, 2016 at 1:22pm
Now many more keen amateurs can access the data to dig deeper into the archives to explore the universe at levels only dreamed of. The current and new NEO / asteroid data is still limited to registered measurers and institutions.

http://www.ifa.hawaii.edu/info/press-releases/panstarrs_release/
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreMonday, December 19th, 2016 at 2:46am
Bright meteor streaks past Achernar 17/12/2016. The green colour tells us it has magnesium content.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, November 25th, 2016 at 9:33am
Public Viewing
25 November - Cancelled
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreTuesday, November 22nd, 2016 at 3:19pm
Our next monthly Braai and Sky and Year End Party takes place on:
Date: Sunday 27 November 2016
Time: 16h30
Location: Jhb. Observatory, Top of the hill at the Herbert Baker Library.
Topic: Whats Up – a detailed overview af some objects.
Donation: R20 pp for the fire wood. Children under 15 free.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared Science Channel's video.Sunday, November 20th, 2016 at 12:06pm
Comets unusual magnetic field oscillations converted into sound.
Astronomy - ASSA Johannesburg Centre
Science Channel
This comet is singing its heart out!
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a link.Wednesday, November 16th, 2016 at 6:57pm
Astronomy - ASSA Johannesburg Centre
The app that lets you see the Milky Way in stunning radio waves
The interactive galactic map enables users to filter their view of the universe by radiation bands, incorporating stunning images captured by a survey in Murchison, Western Australia.
dailymail.co.uk

Twitter

Friday, February 24th, 2017 at 6:30am
ASSAJHB
Unfortunately the Braai and Sky for Sunday 26 Feb is CANCELLED due the consistently poor weather conditions.
Friday, February 17th, 2017 at 12:10pm
RT @AsteroidDay: We'll be announcing our programs for Asteroid Day 2017 at our annual press conference on Feb 14 at 2.30PM CET. More: https… JoosteJerome photo
96
Friday, February 17th, 2017 at 8:12am
ASSAJHB Public Viewing
17 Feb 2017 - CANCELLED
Wednesday, February 8th, 2017 at 12:37pm
ASSAJHB Meeting
Brian Fraser: A most important discovery in the field of meteoritics.
Jhb Observatory Auditorium : 19h30 : 8 February 2017
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