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Lunar Occultations of Close Double Stars

Lunar Occultations of Close Double Stars. Occultation of R946, 2011 November 14. The why and wherefore of observing these events. NACAA 2014 April 20 Occultations Session Brian Loader RASNZ Occultation Section. SAO 160149 2013 September 12. SAO 160149 Occultation Video Frame.

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Lunar Occultations of Close Double Stars

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  1. LunarOccultations of Close Double Stars Occultation of R946, 2011 November 14 The why and wherefore of observing these events NACAA 2014 April 20 Occultations Session Brian Loader RASNZ Occultation Section SAO 160149 2013 September 12

  2. SAO 160149 Occultation Video Frame

  3. Occultation Light Curve, Single Star

  4. Occultation Light Curve for SAO 160149

  5. Double Star Occultation, Light Curve Secondary Intensity Step Length (seconds) Primary Intensity

  6. Double Star Occultation, Light Curve 176 ± 78 Step Length (seconds) 1.16 s 367 ± 42

  7. Double – Fainter Star second

  8. Double Reappearance

  9. Double Star Programme Aims md Accurate times of both events Position Angle and Separation and Magnitudes Discovery of new doubles Confirmation / Rejection Publication of results

  10. Solution for R68 using OCCULT N E E Prediction: 0.092” 258.37°

  11. Possible Resolution 2 or 3 video frames, ca 0.1 second … … ca 30 to 35 milli arc-second... 60 m on the moon, 1AU at 100 light years.

  12. Total Number of Observations Archived as at 2014 April 6

  13. Numbers of Observations Receivedas at 2014 April 6

  14. Numbers of Observers by Country Australia 11 New Zealand 4 Japan 17 USA 9 Europe 7

  15. Publication Suitable observations are published in the on-line Journal of Double Stars Observations. http://www.jdso.org

  16. Discovery Papers

  17. JDSO July 2010

  18. JDSO July 2011

  19. JDSO October 2012

  20. JDSO April 2014

  21. Known doubles, PA and Separation Measured

  22. Occultation Discoveries

  23. Possible Double Stars shown to be single

  24. Observer Separation 10° round the Moon’s limb projected on the Earth’s surface is ca 3° latitude Hobart – Melbourne ca 5° Melbourne – Sydney ca 4.5° Sydney – Brisbane ca 6° Brisbane – Rockhampton ca 4.2° Perth Adelaide Murrumbateman

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