2007JJ43 Bright star event > Tonight <

[Felipe Braga Ribas]

Dear colleagues,

this is a quick reminder about tonight's occultation by the TNO 2007
JJ43 (attached map), the occultation star is bright and the event can
last or 30 seconds, allowing observations with small telescopes.

2007 JJ43 - 05:39 to 05:50 - Gmag = 11.9
See more information and fiding charts at:
http://lesia.obspm.fr/lucky-star/campaigns/2019-07-11_2007JJ43.html

Observations are confirmed from SOAR, Itajubá/BR, UNESP and Trappist.

Clear skies,
Felipe.


Em qui, 4 de jul de 2019 às 14:48, Felipe Braga Ribas
<felipe...@gmail.com> escreveu:
>
> Dear colleagues,
> I hope you could have observed the beautiful stellar occultation by the Moon!
>
> In the coming days, we will have a few stellar occultations by outer
> solar system objects that I want to draw your attention and call for
> collaboration.
>
> Night - 05-06/July
> 2002 MS4 - 01:05 to 01:15 - Gmag = 15.3
> http://lesia.obspm.fr/lucky-star/occ.php?p=1088
>
> Night - 05-06/July (yes, same night!)
> Quaoar - 03:59 to 04:10 - Gmag = 15.4
> http://lesia.obspm.fr/lucky-star/occ.php?p=16569
>
> Night - 08-09/July
> 2002 MS4 - 04:19 to 04:20 - Gmag = 15.8
> http://lesia.obspm.fr/lucky-star/occ.php?p=1099
>
> Night - 10-11/July (Bright star!)
> 2007 JJ43 - 05:39 to 05:50 - Gmag = 11.9
> http://lesia.obspm.fr/lucky-star/campaigns/2019-07-11_2007JJ43.html
>
> Night - 30-31/July
> Makahon - 04:42 to 04:52 - Gmag = 13.5
> http://lesia.obspm.fr/lucky-star/occ.php?p=5982
>
> All the events will be observed from Itajubá/Brazil.
> We will use SOAR for 2002MS4 09/July and 2007JJ43 events.
> Hope you can join us.
>
> Aims:
> 2007 JJ43 - this is a big-sh TNO (~ 575 km) that is occulting a bright
> star, so we can use this event to learn about his size/shape and
> environment (rigns, atmosphere);
>
> 2002 MS4 - one of the biggest TNOs, crossing the Milky Way. Any
> detection would give a precise position and then we will be able to
> search for a very good event worldwide to study its physical
> properties. The first is on the same night as of Quaoar event, the
> second has its nominal prediction over the main telescopes in Chile.
>
> Quaoar - we had two nice detections this year already, the idea is to
> put them all together have a better shape determination.
>
> Makhaon - this event crosses an area with many telescopes and occults
> a bright star, so we can learn its size and shape.
>
> There are more interesting events on the campaign page, visit it:
> http://lesia.obspm.fr/lucky-star/campaigns.php
>
> Please let me know if you have any question on this.
>
> Clear skies,
> Felipe.