A spectacular lunar graze

Slides:

Advertisements

Similar presentations

Lunar occultations Review/update on recent developments.

Advertisements

Occultations during 2009 David Dunham IOTA meeting, 2008 Sept. 14.

Restoring the Early Grazes: An International Cooperative Effort Dave Gault, Australia and Ken Coles, U.S.A.

Changing a Large Deployment at the Last Minute – more Eudora David Dunham July 16, 2011.

Hiraoka Occultation Pushing the limits on what a backyard observer can do with modest amateur equipment By Tony George Umatilla, Oregon.

Welcome to the International Occultation Timing Association 2010 November 17 IOTA/Middle East Conference David W. Dunham, President, IOTA.

European Symposium on Occultation Projects 2013 August CosmoCaixa, Barcelona, Cataluña, Spain David W. Dunham

The Review of the Archive of Lunar Graze Observations Presented at Trans Tasman Symposium on Occultations - 4 (March 2010 – Canberra Australia) and IOTA.

Finding Grazing Occultation Sweet Spots using Kaguya Profiles 2013 August 24, Barcelona, Spain 32nd European Symposium on Occultation Projects and 2013.

IOTA Meetings from 1998 – present have a new web page: Summary of Minutes of the 28 th Annual.

Basics of Observing and Timing Asteroidal Occultations presented 2014 July 12, UMD Obs., College Park, MD 32 nd Annual IOTA Meeting David W. Dunham.

Limovie for Lunar Occultations Analysis of a Double Star Occultation Video using LIMOVIE Light Curve, Event Times, Magnitudes. Limovie is written.

Observing Efficiently By Dave Gault Presented to 8 th Trans-Tasman Symposium on Occultations Friday, 18 th April 2014 Melbourne, Australia.

Lunar Grazing Occultations What are they? Why are they Valuable? Are they fun?

Basics of Observing and Timing Grazing Occultations presented 2014 July 12, UMD Obs., College Park, MD 32 nd Annual IOTA Meeting David W. Dunham.

Results of Recent Grazing Occultation Observations presented 2014 July 13, UMD Obs., College Park, MD 32 nd Annual IOTA Meeting David W. Dunham.

Varun Bhalerao Dual Channel Photometer for KBO search by occultations Varun Bhalerao Advisor: Shri Kulkarni 24 Sep 2007.

Measuring Motion Chapter 10.1.

August 21, 2017 Total Eclipse Plans of the International Occultation Timing Association (IOTA) David Dunham, Richard Nugent, D. Herald, P. Maley, Joan.

Introducing Astronomy Education into High School Physics Curriculum Through the Use of the University of North Dakota Observatory Caitlin Nolby Space Studies.

Lunar Grazing Occultations What are they? Why are they Valuable? Are they fun?

Polar Topographic Knowledge Prior to LCROSS Impact David E. Smith 1, Maria T. Zuber 2 1 NASA/Goddard Space Flight Center 2 Massachusetts Institute of Technology.

From RegentsEarth.com How to play “Earth Science Battleship” Divide the class into two teams, Red and Purple. Choose which team goes first. The main.

Occultations Do you need one more reason to add more toys for astronomy?

Grazing Occultation SAO Sunday, 2011 February 6 Maps showing possible observing sites in northern Upper Marlboro, MD, especially at the Presidential.

Balloon-based observations of stellar occultations Cathy Olkin Southwest Research Institute April 27, 2007.

Get out the Notes from Monday Feb. 4 th, Example 2: Consider the table below displaying the percentage of recorded music sales coming from music.

Steve Conard Ted Blank International Occultation Timing Association (IOTA) Oct 05, 2013.

Jyotirvidya Parisanstha (JVP), Pune India Oldest association of Amateur Astronomers of India Established in 1944 Presently active in Serious Astronomy.

Versatile Paver Mounts – Enabling Previous-Night Pre-Pointing and More 2015 Oct. 16, Las Vegas, Nevada International Occultation Timing Association - Annual.

FM13p.21 – Solar Diameter Measurements from Eclipses as a Solar Variability Proxy David W. Dunham*, Internat’l Occultation Timing Assoc. (IOTA); Sabatino.

Interference and Diffraction. Conditions for Interference Coherent Sources - The phase between waves from the multiple sources must be constant. Monochromatic.

Oh Where Oh Where Has My Little Dog Gone LATITUDE AND LONGITUDE.

DEp.1.08 – Plans to Observe the 2017 Total Solar Eclipse from near the Path Edges David W. Dunham* and Richard Nugent, International Occultation Timing.

DGp Close Double Stars from Occultation Video Recordings David W. Dunham, Anthony George, Brian Loader, and David Herald, International Occultation.

Workshop 3ieme zone janvier Serendipitous stellar occultations and the structure of the Kuiper Belt F. Roques, A. Doressoundiram (Observatoire.

Analysis of wind shear for the ExoMars mission using ultra-high resolution Large Eddy Simulation T. Bertrand, A. Spiga, A. Colaïtis.

Best Grazing Occultations of the Coming Year David Dunham IOTA Meeting, Stillwater, Oklahoma 2016 July 30.

Determining asteroid diameters from occultations Dave Herald.

The Best-Observed Lunar Grazing Occultations since the Last Meeting David Dunham IOTA Meeting, Stillwater, Oklahoma 2016 July 30.

Occultations of Regulus by Asteroids, especially by 134-km (268) Adorea on 2016 October 13 David Dunham IOTA Meeting, Stillwater, Oklahoma 2016 July 30.

– Results of Observations of Occultations of Stars by Main-Belt and Trojan Asteroids, and the Promise of Gaia David W. Dunham*, David Herald, Steve.

Lunar Profiles for the Aldebaran Graze, March 4, 2017

Aldebaran Graze Planning Meeting OSU, Stillwater, OK, July 28, 2019

IOTA Plans for 21 August 2017 Eclipse

OSU, Stillwater, Oklahoma

Uploading light curves to Occult4

Two Recent Aldebaran Grazes (and one of gamma Librae) David Dunham IOTA meeting, Carson City, NV, 2017 Sept July 29th am Aldebaran; graze in TX.

The 2017 Solar Eclipse: IOTA effort, outreach, & sites; discussion

Upcoming Grazing Occultations

Lunar Occultations of Close Double Stars

Mid-Atlantic Occultations, 2014 February - March David Dunham

1) You run from your house to a friend's house that is 3 miles away

2016 July 30, Stillwater, Oklahoma

Hiding under a freeway overpass will protect me from a tornado.

First Assessments of EUVI Performance on STEREO SECCHI

Titan tholin properties from occultation and emission observations

Occultation of Regulus by (268) Adorea 2016 October 13 David and Joan Dunham Previous attempts with occultations of Regulus by asteroids 2005 Oct.

STELLAR OCCULTATIONS Version 01, 14/10/2016

Three Asteroidal occ’ns in central USA, Aug

Grazing Occultations, David Dunham IOTA Annual Meeting 2018 April 20, Suffern, NY Covering since the last IOTA meeting in 2017 September to.

Asteroidal Occultations: Results May

Asteroidal & Lunar Occultations: Results

Occultation of Venus by 15% waning Moon, 2015 May 24

International Occultation Timing Association

An Unusual Occultation…. or was it a Grazing Occultation ?

Grazing with Team Occultation (N.S.W. Chapter)

Ken Creager, Wendy McClausland and Steve Malone

15-1: Interference Interference, a phenomenon that occurs when two light beams meet. If the two beams enhance each other to give a brighter beam, it is.

The waves spread out from the opening!

Presentation transcript:

A spectacular lunar graze 2015 Nov 17 Dave Herald

Lunar grazes have multiple events as the star skims along the lunar limb When grazes were commonly observed, it was not possible to accurately predict where a large number of events could be observed This has changed with the advent of data from the Kaguya, and subsequently the LRO LOLA missions 28/11/2018

Lunar graze profile Occult can now generate lunar limb graze profiles having very detailed resolution Enables the observer to position themselves to observe large number of events Enhanced opportunities to measure stellar diameter, or double star properties 28/11/2018

Profile changes with longitude The graze profile varies along the path To maximise the number of events, consider selecting the site longitude The example shows the changes at steps of 0.5° (about 30 miles) along the path GrazeProfile 635cG8 2016 Feb 16.gif 28/11/2018

Graze on 2015 Nov 17 On 2015 Nov 17, a good graze occurred close to my home. David & Joan Dunham had recently arrived in Canberra from Alice Springs – but had not yet unpacked…. On the night, over a distance of 272 meters: Joan was set up in time, but could only record the first half because of increasing cirrus David was unable to set up in time I observed through thin but increasing cirrus

Predicted path

Graze profile, with Dunham’s home site indicated Found an observing location to maximise the number of events – at about 4.7km in

Video of the event The video of the graze is on YouTube. Address is https://www.youtube.com/watch?v=ucAP5FAx9uA 28/11/2018

Results Mean residual of events: 0.01" ±0.03" Telescopes: Aperture Longitude Latitude Alt # cm o ' " o ' " m A 20 +149 0 9.1 -35 9 57.5 591 B 20 +149 0 7.1 -35 10 6.2 597 ref Tel Observer Star No. y m d h m s PhGrMrCeDb O-C 001 A D. Herald S 163293 2015 11 17 10 38 52.18 DD G G 2 0.03 002 A D. Herald S 163293 2015 11 17 10 38 52.30 RD G G 2 0.03 003 A D. Herald S 163293 2015 11 17 10 38 52.94 DD G G 1 0.01 004 A D. Herald S 163293 2015 11 17 10 38 59.94 RD G G 1 -0.01 005 A D. Herald S 163293 2015 11 17 10 39 0.14 DD G G 1 -0.01 006 A D. Herald S 163293 2015 11 17 10 39 3.40 RD G G 1 0.00 007 A D. Herald S 163293 2015 11 17 10 39 3.82 DD G G 1 0.00 008 A D. Herald S 163293 2015 11 17 10 39 4.26 RD G G 1 0.01 009 A D. Herald S 163293 2015 11 17 10 39 5.02 DD G G 1 0.01 010 A D. Herald S 163293 2015 11 17 10 39 13.44 RD G G 1 -0.02 011 A D. Herald S 163293 2015 11 17 10 39 29.62 DD G G 1 -0.01 012 A D. Herald S 163293 2015 11 17 10 39 29.66 RD G G 1 -0.01 013 A D. Herald S 163293 2015 11 17 10 39 29.92 DD G G 1 -0.02 014 A D. Herald S 163293 2015 11 17 10 39 35.60 RD G G 1 -0.04 015 A D. Herald S 163293 2015 11 17 10 39 37.30 DD G G 1 0.01 016 A D. Herald S 163293 2015 11 17 10 40 54.02 RD G G 1 0.01 017 A D. Herald S 163293 2015 11 17 10 40 55.98 DD G G 1 0.00 018 A D. Herald S 163293 2015 11 17 10 40 59.78 RD G G 1 0.01 019 A D. Herald S 163293 2015 11 17 10 41 0.02 DD G G 1 0.01 020 A D. Herald S 163293 2015 11 17 10 41 0.08 RD G G 1 0.02 021 A D. Herald S 163293 2015 11 17 10 41 0.30 DD G G 1 0.02 022 A D. Herald S 163293 2015 11 17 10 41 0.38 RD G G 1 0.02 023 A D. Herald S 163293 2015 11 17 10 41 0.42 DD G G 1 0.02 024 A D. Herald S 163293 2015 11 17 10 41 1.38 RD G G 1 0.02 025 A D. Herald S 163293 2015 11 17 10 41 1.62 DD G G 1 0.01 026 A D. Herald S 163293 2015 11 17 10 41 1.74 RD G G 1 0.01 027 A D. Herald S 163293 2015 11 17 10 41 2.14 DD G G 1 0.01 028 A D. Herald S 163293 2015 11 17 10 41 8.74 RD G G 1 0.04 029 A D. Herald S 163293 2015 11 17 10 41 8.94 DD G G 1 0.05 030 A D. Herald S 163293 2015 11 17 10 41 9.14 RD G G 1 0.05 031 A D. Herald S 163293 2015 11 17 10 41 9.26 DD G G 1 0.03 032 A D. Herald S 163293 2015 11 17 10 41 9.78 RD G G 1 0.02 033 A D. Herald S 163293 2015 11 17 10 41 9.90 DD G G 1 -0.07 034 A D. Herald S 163293 2015 11 17 10 41 10.10 RD G G 1 -0.07 035 A D. Herald S 163293 2015 11 17 10 41 10.18 DD G G 1 0.02 036 A D. Herald S 163293 2015 11 17 10 41 10.26 RD G G 1 0.01 037 A D. Herald S 163293 2015 11 17 10 41 10.74 DD G G 1 0.02 038 A D. Herald S 163293 2015 11 17 10 41 11.86 RD G G 1 0.01 039 A D. Herald S 163293 2015 11 17 10 41 11.98 BD G G 2 0.01 040 A D. Herald S 163293 2015 11 17 10 41 12.46 DD G G 2 -0.01 041 A D. Herald S 163293 2015 11 17 10 41 15.02 RD G G 2 0.00 042 A D. Herald S 163293 2015 11 17 10 41 15.70 DD G G 2 0.00 043 A D. Herald S 163293 2015 11 17 10 41 16.46 RD G G 1 0.00 044 A D. Herald S 163293 2015 11 17 10 41 22.30 DD G G 1 0.02 045 A D. Herald S 163293 2015 11 17 10 41 23.18 RD G G 1 0.01 046 A D. Herald S 163293 2015 11 17 10 41 24.10 DD G G 1 0.06 047 A D. Herald S 163293 2015 11 17 10 41 24.38 RD G G 1 0.10 048 A D. Herald S 163293 2015 11 17 10 41 25.86 DD G G 1 -0.02 049 A D. Herald S 163293 2015 11 17 10 41 39.78 RD G G 2 0.00 050 B J. Dunham S 163293 2015 11 17 10 39 7.09 DD G G 1 0.01 051 B J. Dunham S 163293 2015 11 17 10 39 12.00 RD G G 1 0.00 052 B J. Dunham S 163293 2015 11 17 10 39 30.75 DD G G 1 -0.02 053 B J. Dunham S 163293 2015 11 17 10 39 34.45 RD G G 2 0.00 B J. Dunham S 163293 2015 11 17 10 40 33.8 RD G G 1 0.00 Mean residual of events: 0.01" ±0.03"

Reduction plot 49 events detected at one site – a record Plot also shows path for Joan Dunham – located just 272 metres south 28/11/2018

Enlarged profile plots