Visitors to the Observatory must fill in an indemnity form.
The forms are available from the ASSAJhb coordinator at the event or can be downloaded from the link.
Completed forms must be handed to the ASSAJHB coordinator.

Notice of Next Meeting

Our next monthly meeting takes place on:

Indemnity Form Download.

  • Date: Thursday 18 January 2018
  • Time: 19h30
  • Location: Jhb. Observatory
  • Presenter: Sheldon Herbst
  • Topic: Beginners Guide to General Relativity
  • Donation: R20 pp for tea and snacks

Meetings generally last about one and a half hours, and include a 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:

Indemnity Form Download.

  • Date: Sunday 28 January 2018
  • 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:

Indemnity Form Download.

  • Jan –
  • Feb –
  • Mar –
  • Apr –
  • May –
  • May –
  • Jun –
  • Jun –
  • Jun –
  • Jul –
  • July –
  • Aug –
  • Aug –
  • Sep –
  • Sep –
  • Oct –
  • Oct –
  • Nov –
  • Donation: R20 pp. Children under 15 free.

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

Facebook

Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre added 3 new photos.Wednesday, December 6th, 2017 at 10:13am
What did I use for the M42 Photo?
Lots of patience.😁

Allmost 39 Hours of total Exposure Time

Equipment used:

William Optics GTF102 refractor
2 x William Optics ZenithStar 71 refractor telescopes
SBIG STL11000M CCD Camera
SBIG ST8300M CCD Camera
Canon 60D Camera
Ha, OIII, Hb, SII, CLS Filters used
Celestron CGEM Mount
Orion Star Shoot Auto Guider

Software used:

Sequence Generator Pro
PixInSight

Exposures:

Canon 60D Using the CLS Filter

20 x 15 second Split into LRGB
20 x 30 second Split into LRGB
20 x 150 second Split into LRGB
20 x 300 second Split into LRGB

SBIG STL11000M

20 x 120 second on each filter OIII, Hb, SII
20 x 300 second on each filter OIII, Hb, SII
20 x 600 second on each filter OIII, Hb, SII
10 x 1200 second on each filter OIII, Hb, SII

SBIG ST8300M

20 x 120 second filter Ha
20 x 300 second filter Ha
20 x 600 second filter Ha
10 x 1200 second filter Ha

100 x Darks and Bias also used
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg CentreWednesday, December 6th, 2017 at 8:18am
The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2,000 times that of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared NASA - National Aeronautics and Space Administration's video.Saturday, December 2nd, 2017 at 12:13pm
Astronomy - ASSA Johannesburg Centre
NASA - National Aeronautics and Space Administration
‘This Week @NASA’, a giant black hole pair photobombed the Andromeda galaxy, the next International Space Station crew made preparations for their Dec. 17 launch and more! Watch: https://youtu.be/O-woH3u7hJk
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a link.Saturday, December 2nd, 2017 at 12:04pm

Twitter

Friday, November 24th, 2017 at 4:55am
ASSAJHB
Public Viewing
JohannesburgObservatory
24/11/17
CANCELLED due to poor weather
https://t.co/Wt1nkBhI5c
Friday, October 27th, 2017 at 8:58am
ASSAJHB
Public Viewing
Johannesburg Observatory

Cancelled due to weather.
Friday, September 29th, 2017 at 8:07am
ASSAJHB
JHB Observatory
Public Viewing 29 September
Cancelled due to poor weather
Sunday, September 24th, 2017 at 10:47am
ASSAJHB
Sky and Braai - Cancelled - weather deteriorating -clouds and particulate in atmosphere.
Tuesday, September 5th, 2017 at 12:45pm
ASSAJHB
Monthly Meeting
Date : 13 Sep
Speaker : Heystek Grobler - HartRAO
Topic : Introduction to Radio Astronomy
https://t.co/KqnHrWs75c

In the Night Sky

Night Skies for November.

 

Change is constant and most constantly, Gauteng Astronomers are affected by our summer weather patterns. Over and above that, astrnomers are people who never give up. Their desire to know more, their desire to see more, is surely the grit that makes them try and try again. Changes will come but without a doubt we will continue searching and seeing with passion.

For the month of November we have  Saturn in the west, Mars and Venus in the East and if we are lucky, a fast last gaze at Jupiter.

With regard to constellations, all our known favourites are back in their summer places and all around them are the beautiful nebula and galaxies, so beautiful and so mystical, ready to amaze us night after night.

May the light of stars: Aldebaran, Betelgeus, Sirius, Canopus, Achernar, Formalhaut and more shine brightly upon all.

Looking Upward!

Moon Phases:

Universe Today

It is a well known fact among astronomers and cosmologists that the farther into the Universe you look, the further [...]

Sat, Dec 09, 2017
Source: Universe Today

Welcome to another edition of Constellation Friday! Today, in honor of the late and great Tammy Plotner, we take a [...]

Fri, Dec 08, 2017
Source: Universe Today

     Space.com

Six people recently returned from an eight-month long isolation experiment to test human endurance for long-term space missions. [...]
Sun, Dec 10, 2017
Source: SPACE.COM
The new moon will rise on the morning of Dec. 18, and while you won't be able to find it [...]
Sun, Dec 10, 2017
Source: SPACE.COM

Astronomy.com

Astronomers have produced the most detailed three-dimensional map ever for the motions of nearby galaxies. [...]
Thu, Dec 07, 2017
Source: Astronomy.com
The Liberty Science Center in Jersey City is opening the fourth largest planetarium in the world on December 9, 2017. [...]
Thu, Dec 07, 2017
Source: Astronomy.com

APOD

December's Full Moon phase occurred near

December's Full Moon phase occurred near


[...]
Source: APOD
Have you ever watched the Moon rise?

Have you ever watched the Moon rise?


[...]
Source: APOD