Occultation observations from around the world july 2012 to sept 2013
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Occultation observations from around the world July 2012 to Sept 2013. Dave Herald. Part 1. Lunar Occultations. Summary of observations July 2012 – Sept. 2013. # Observations by region. Nth America458 Australasia1140 Japan4158 Europe1451 MiddleEast 25.

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Occultation observations from around the world July 2012 to Sept 2013

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Occultation observations from around the world july 2012 to sept 2013

Occultation observations from around the worldJuly 2012 to Sept 2013

Dave Herald


Part 1

Part 1

Lunar Occultations

Summary of observations

July 2012 – Sept. 2013


Observations by region

# Observations by region

  • Nth America458

  • Australasia1140

  • Japan4158

  • Europe1451

  • MiddleEast25


Double star observations

Double star observations

Reports collected and analysed by Brian Loader, New Zealand

  • WDS stars measured78

  • Discoveries22

  • OCC stars +’ve measures7

  • Wide doubles (>2”)8

  • OCC stars NOT double99

  • WDS observed as single24

  • Doubtful16

    TOTAL254


Part 2

Part 2

Asteroidal Occultations

Summary of the best events

Jul 2012 – Sept 2013


The number of events is falling

The number of events is falling....


Number of successful events by region and max sites 2012 07 2013 08

Number of successful events by region, and max # sites: 2012/07 2013/08

  • Australasia23 + 41(11 sites)

  • Europe32 + 33(34 sites)

  • Japan 7 + 14(14 sites)

  • US27 + 50(11 sites)

    Japan has a much smaller land area than the other regions;

    Australasia has a much smaller population


Satellite discoveries 1 agamemnom 2012 jan 19

Satellite discoveries#1 Agamemnom– 2012 Jan 19


Satellite discovery 2 viipuri 2013 aug 3 single integrated frame event

Satellite discovery#2 Viipuri– 2013 Aug 3(?? - single integrated frame event)


Double stars discovered in asteroidal occultations

Double stars discovered in asteroidal occultations

  • New double stars can be discovered in an asteroidal occultation

  • Separations are usually in the range 0.1” to 0.001”

  • If several observers, the uncertainty in separation can be less than 1 milli-arcsecond


7 double stars discovered since june 2012

7 double stars discovered since June 2012

Star number Sep (mas) P.A. Date Asteroid

6223-00442-1 37.8 -69.8 2012 Aug 12 52 Europa

HIP104465 9.2 ± 0.8 171.5 ± 1.2 2012 Nov 25 168 Sibylla

2U42913552 28.2 ± 0.5 107.6 ± 3.6 2012 Dec 3 388 Charybdis

2U46691743 43.0 ± 0.6 237.0 ± 1.2 2013 Jan 27 536 Merapi

1950-00148-1 28.3 ± 0.4 12.3 ± 0.8 2013 Feb 6 92 Undina

6258-00144-2 1.0 -4.0 2013 Jul 24 1271 Isergina

2U30429828 380.0 240.0 2013 Aug 15 611 Valeria


Valeria 2013 aug 15 wide double star 380mas time diff 66 secs

Valeria - 2013 Aug 15 Wide double star (380mas)Time diff: 66 secs


The 9 best results for the period

The 9 best results for the period


430 hubris 2012 aug 14 europe

430 Hubris 2012 Aug 14, Europe


Pluto 2012 aug 6 australia

Pluto2012 Aug 6, Australia


521 brixia 2012 oct 22 usa

521 Brixia2012 Oct 22, USA


87 sylvia 2013 jan 6 europe

87 Sylvia2013 Jan 6, Europe


45 eugenia 2013 may 20 usa

45 Eugenia2013 May 20, USA


576 emanuela 2013 july 26 australia

576 Emanuela2013 July 26, Australia


387 aquitania 2013 jul 26 usa

387 Aquitania2013 Jul 26, USA


489 comacina 2013 aug 24 usa

489 Comacina2013 Aug 24, USA


139 juewa 2013 aug 31 australia

139 Juewa2013 Aug 31, Australia


Any questions

Any questions?


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