Notice of Next Meeting

Our next monthly meeting takes place on:

  • Date: Wednesday 14 June 2017
  • Time: 19h30
  • Location: Jhb. Observatory
  • Presenter:  TBA
  • Topic: TBA
  • Donation: R20 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

Sky and Braai

Our next monthly Braai takes place on:

  • Date: Sunday 28 May 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 –
  • 21 Apr – 0% Moon Illumination
  • 5 May – 77% Moon Illumination
  • 19 May – 0% Moon Illumination
  • 2 Jun – 64% Moon Illumination
  • 16 Jun – 0% Moon Illumination
  • 30 Jun – 48% Moon Illumination
  • 14 Jul – 0% Moon Illumination
  • 28 July – 33% Moon Illumination
  • 11 Aug – 0% Moon Illumination
  • 25 Aug – 18% Moon Illumination
  • 15 Sep – 0% Moon Illumination
  • 29 Sep – 66% Moon Illumination
  • 13 Oct – 0% Moon Illumination
  • 27 Oct – 49% Moon Illumination
  • 10 Nov – 0% Moon Illumination
  • 24 Nov – 32% Moon Illumination

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

The Night sky for June

 

With the winter solstice already on our doorstep. Our telescopes should be out, dusted and made ready for stargazing, night upon starry night.

See Jupiter, its beautiful bands and great red spot. Saturn, our queen of the night as she rises in the East.

Look at the moon and trace Arstoteles, a crater, the highlight of the month.

The distances between stars is really vast. Think of a light year – about 10 trillion KM long. Stars can be light years apart.

Is the alumni in the science world of astronomy  considering star travel?

Imagine…. visiting Alpha Centauri – only at 4.3lightyears away.

Be practical or dream and read about it in Canopus.

 

Moon Phases:

Universe Today

SpaceX Falcon 9 rocket carrying commercial Inmarsat 5 F4 broadband satellite blasts off to geostationary orbit at twilight [...]

Sun, May 21, 2017
Source: Universe Today


One of the things I love about astronomy is how it’s rapidly changing and evolving over time. Every day [...]

Sun, May 21, 2017
Source: Universe Today

     Space.com

Here's a guide to the major astronomical events of the next year, as well as space launches and milestones for [...]
Mon, May 22, 2017
Source: SPACE.COM
NASA Astronauts Peggy Whitson and Jack Fisher will replace the multiplexer/demultiplexer, or MDM on May 23, 2017. [...]
Mon, May 22, 2017
Source: SPACE.COM

Astronomy.com

This map uses quasar positions to reveal further clues about dark energy. [...]
Fri, May 19, 2017
Source: Astronomy.com
The mystery of Tabby's Star kicks in again. [...]
Fri, May 19, 2017
Source: Astronomy.com

APOD

Scanning the skies for galaxies, Canadian astronomer

Scanning the skies for galaxies, Canadian astronomer


[...]
Source: APOD
Watch a huge lightning storm move across the eastern USA.

Watch a huge lightning storm move across the eastern USA.


[...]
Source: APOD

Facebook

Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, May 19th, 2017 at 2:06pm
ASSAJHB
Public Viewing
JHB Observatory
18A Gill Street, Observatory
19h30 -22h00
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, May 5th, 2017 at 12:50pm
The public viewing for 5 May has to be cancelled due to poor weather forecast for this evening.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared CosmosUp's video.Wednesday, May 3rd, 2017 at 7:59am
Astronomy - ASSA Johannesburg Centre
CosmosUp
Solar System Size Comparison
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSaturday, April 22nd, 2017 at 7:57am
While the shimmering, eerie, light display of auroras might be beautiful and captivating, they are also a visual reminder that Earth is connected electrically to the Sun.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, April 21st, 2017 at 1:51pm
The Public Viewing for 21 April has to unfortunately be cancelled due to work and other prior commitments by our viewing officers.
Our apologies for this development.

Regards

Jerome
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSunday, April 2nd, 2017 at 10:28pm
Get in on the act....... 5 Million data sets analysed in three days. That's really going some.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared Physics-Astronomy.com's video.Friday, March 31st, 2017 at 7:20pm
Astronomy - ASSA Johannesburg Centre
Physics-Astronomy.com
You've probably never seen the moon like this 🌚 That's because the moon is tidally locked to Earth, so we only see one side. Almost like its spinning with us. This video was created using images from the Lunar Reconnaissance orbiter.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreSunday, March 26th, 2017 at 8:40am
ASSAJHB
SKY and BRAAI - 26 March - CANCELLED
Unpredictable weather.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, March 17th, 2017 at 2:59pm
ASSAJHB
Public Viewing - 17 March 2017
CANCELLED - Unpredictable weather
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, March 17th, 2017 at 10:49am
ASSAJHB
Public Viewing - 17 March 2017
18A Gill Str, Observatory
Late Summer Sky
19h30 - 22h00
http://astronomyjhb.co.za
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreThursday, March 16th, 2017 at 10:28am
After decades of failures and misunderstandings, scientists have solved a cosmic riddle — what happens to the tons of dust particles that hit the Earth every day but seldom if ever get discovered in the places that humans know best, like buildings and parking lots, sidewalks and park benches.

The answer? Nothing. Look harder. The tiny flecks are everywhere.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a link.Monday, March 13th, 2017 at 7:48pm
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, March 10th, 2017 at 2:41pm
ASSAJHB Workday

It would be appreciated if members who will be helping please notify the committee so that we have an idea of what we can tackle on the day. Members have kindly offered to bring additional assistance such as treefellers. This needs to be addressed through appropriate consultation as there are costs involved.

Please note that this activity is weather dependent and may be cancelled at short notice.

Voortrekkers - The Voortrekkers have volunteered to assist with maintenance on the hill and we are very thankful for this gesture. However it must be appreciated that their activities need to be well coordinated and logistics put in place to assemble and transport the children so it is not expected that they will be available to help at any given time the society decides to do maintenance. There contribution whenever it takes place will certainly be appreciated.

Tractor Mowers
We will be inspecting the tractor mowers on 16 March Thursday so they will most probably not be ready for 18 March.

Areas
HBL - Herbert Baker Library Building - The stone building with the cupola on the roof.
Common - Lawn area where we set up telescopes and braai
Walkway - the path leading from the common past the Jacobs Telescope to the Viewing Deck
Parking area - The lawn and adjacent areas on the southern side of the road
Clubhouse - The proposed clubhouse on the corner at the top of the hill
Toilets - The two toilets next to the clubhouse
Western Ridge - the area to the west of the Viewing deck.

Refreshments and sausage rolls will be provided.

Saturday 11 March - Grass maintenance

We will be cutting the very long grass on the edges of the common and walkway to the viewing platform.
This is manual labour and we'll be cutting with slashers and brush cutters. The grass on the common and walkway has already been cut but will be tended to again on 18 March.

Saturday 18 March - Workday

The committee agreed that Saturday 18 March be set aside as a work day at the top of the hill.
Below are some of the things we need to work on.

The grass on the common and walkway will be cut with push mowers.

Grass next to HBL to be cut

Blackjacks and other weeds will need to be removed.

Small trees or branches trimmed from around the domes

The hedge next to HBL trimmed with hedge trimmers.

Parking area to be mowed and cleared with slashers.

Domes swept out and floors washed with water.

Telescopes and work surfaces dusted off.

Light bulbs replaced in HBL

HBL floor swept

Red and white light bulbs replaced in domes.

etc etc.

No optics will be cleaned on the workday. This is a specialist job and will be carried out when needed.

Please be aware there are possibly creepies and crawlies in the nooks and crannies. The geckos, lizards and birds have been doing a fine job of ousting them but there are some that even our little allies give a wide berth. Gloves are essential safety gear.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreFriday, March 10th, 2017 at 2:20pm
Pan - Fantastic images
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared Antonio De Franca's photo.Thursday, March 9th, 2017 at 9:41am
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreThursday, March 9th, 2017 at 9:36am
Most interesting and informative presentation on the Hartman Mask by Charlie Fleming and excellent presentation on the odd variable star QZ Carinae by Dave Blane at the monthly meeting 8 March 2017..
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a post.Wednesday, March 8th, 2017 at 8:32pm
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreMonday, March 6th, 2017 at 1:53pm
Monthly Meeting

Date : 8 March 2017

Time : 19h15

Venue : Auditorium - Johannesburg Observatory, 18A Gill street, johannesburg

Speaker : Charlie Fleming

Topic : Hartman Masks
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a photo.Monday, February 27th, 2017 at 12:37am

Twitter

Saturday, May 20th, 2017 at 1:01pm
New Nova discovered by ASSA-SN Cassius telescope. May brighten to mag V8.
https://t.co/aK6zJdWD8X
Friday, May 19th, 2017 at 11:04am
ASSAJHB
Public Viewing
JHB Observatory
18A Gill Street, Observatory
19h30 -22h00
Friday, May 5th, 2017 at 9:02am
ASSAJHB - JHB Observatory - The public viewing for 5 May has to be cancelled due to poor weather forecast for this evening.