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Occul/A/Ion Aewsle//Er Occul/a/ion Aewsle//er Volume 7, Number 3 $5.00 North Am./$6.25 Other iZj Asteroid Chaldaea Occulting SAO 113315 and 113311 CJ 1^ ;' "" "" '" ' 0 ' " "' ''' "' ' '" """ " "" " ' . ' ° ' - XC) . " + a » " ' · P " 0 " Cb " 0 . 0 V) % . " .· H- ,. " t-) ' . · gu ". .. + . " · ' ' sao113304, 750 960 " - . ' ' . - " . 0 CJe> · · · . .· D . D . Lj " + - · . g . - " , , 990 " " " nCj " · g , - " ' sao1·1?31aj600 · , ' ' " .. · ..'. sao113315. 59'? · - " . , ' . g 6+ 0 ' · · . " . ' b . P . ' " . O · , . HD » 0 GJ " 0 0 ' P ·. CJm " ' 8 0 ° - + " b 0 · 0 , . G') 0 " F- L'} ' t . u , C?m : " ' " 0 ' 0 0 + . 0 0 , Di 0 " " - - 1¶0 h · . 'b . ' 0 . , D . * 00 . .' . D ° uonmc m vum^ m . uus^^.. TLvont P. 3¥1Tlm ^ _ _ A7 rJS_ ujn^r 6. 35mm ^ jusm ^ u:jn^r r 3/mr ~ 43sK + Ubh. sIm OIls SAO 113315 - SAD Mag: 6.1 HD: 40372 Spectral: A5 GSC 117:1338 (Stellar) Flamsteed-Bayer: 59 Orionis Magnitude: 5.9 International Occultation Timing Association, Inc. (IOTA) In This Issue Articles Page MOONLIMB - New Lunar Limb Data fiotn Ckmiltation Observations 4 Astropornical Tables Second Edition Rde=d 13 New EVANS Program - No XZ Numbers 13 Ncw Website fur RASNZ Occultation Section 14 Asteroid Ocailtation Predictions 1999: Availability or the Iutemet 15 Ckcultatiojts of Stars by Major and Minor Planets m 1999 15 Grazing Occultation Tips 18 1998 September 10 Occultatioa of PPM 172432 by Asteroid 1574 Mqyer 24 A Ccmplete Portable Astrovideography Setup 24 Advanced Video System with Real-Time GPS Video Tiine Insertion 27 Plans for the February 1999 Annular Eclipse 28 ZC741 Graze Results 30 Observation of August ]6, 1998 Graze of ZC741 (SAO 94227) 31 Triple Graze of 1998 September 12 in Teunessee, USA: Part 1 31 C%cial1 1998 Amual Business Meeting IOTA/ES 33 The 1998 IOTA Annual Meeting 34 Columns Page Grazing Occultatioa Observations 16 Reports of Asteroidal Occu!tatiow in 1996 19 Resources Pa e What to Said to Whom 3 MemberShip and Subscriptioa Idonnation 3 IOTA Publications 3 The gces and Officers of IOTA 39 IOTA European Service (IOTA/ES) 39 IOTA on the World Wide Web 40 IOTA's Telephone Network 40 For subscriptioo purposes, this is the first issue of 1998. On the covc¶ Asteroid ChakheamMing SAD 113315 and 113311, 6.0 magnitude with a dirqp of 5.4 magriitues lasting 14 seconds on 1999 January 7. (The chart was produced with TheSky Level IV v4.00.105.) 2 Occuhmion Newsletter, Volume 7, Number 3; November 1998 International Occultation Timing Association, Inc. (IOTA) What to Send to Whom Membership and Subscription Information " Send llCW md imewal inanbeiShips and subsaiptioHs, back issue All payments made to IOTA must be in Uiiited States requests, address cbange% anail address changes, graze prediction funds and drawn OIl a US bank, dt by credit cad charge to VISA reqiiests, rdmbursement requests, special requcst8 and other or MasterCard. If yju use VISA or MasberCard, include your IOTA business, but not observation reports,, to: account number, expiration date, and signature. (Do not send Craig A. and Terri A. McMknus crulitcartl infollnatioA through e-mail. It isnot secum Ror safe to Secretary & Treasurer do SO.) Make all puymellts to IOTA and send them to the 2760 SW Jewell Ave Secmary& Treasurer at the address on the left ManberShips atid Topeka KS 66611-]614 USA subsaipticms Enay be made for aue or two years, ody"- Email: [email protected] Occu/itahbn Newsletter subscriptions (I year = 4 issues) are US$20.00 per year for USA, CanaA and Mexico; and Send ONartides md editorial matters (hi electronic form) to: USS25.00 peryear fOr all others. Single issues, including baCk Rex L. Easton issw are 1/4 of Elie subscription price. Editor for Occu/tation Newsletter Meinberships include the Occuhation Newsletter and 2007 SW Mission Ave, Apt. I animal pre&tions md supplements. MemberShips are USS30.00 Topeka KS 66604-3341 USA peryearfarUSA C~ md Mexico; and USS35.00 per year for Email: [email protected] all oEhers. Ob$avers~E~ and the British Isles shouldjoin the European Service (IOTA/ES). See the inside back cover for Send Lunar Grazing (kcultation reports to: uiare information. Dr. Mitsuru SOnja VP. for Grazing Occultation Services IOTA Publications National AsEroucmical Observatory Although the foUowhtg are deluded in membership, nonmembers Osawa-2, Nlitaka-shi will be charged for: Tokyo }81-8588, Japm 0 Local Cimmstances for Appukes of Solar System Email: [email protected] objects with Stars predictious US$l.00 · Graze Limit ard Profile predictions US$l.50 per graze. Said iineresting stories of lunar grazing occuhations to: b Papers explaining the usc of the above predictions Richard P. Wilds USS2.50 7328 SW 23 Terr. · IOTA Observer's Manual USS5.00 Topeka KS 66614-6060 USA Email: [email protected] Asteraidal Occdtaticm SUppiiements will be available for US$2.50 hom the following regionO coordinators: Send Total Occultation arid copies ofLunar Grazing Occultation 0 South America--Orlando A. Naranjo; Universidad dc reports to: Ids Andes; Dept. dc Fisica; MCrida, Venezuela International Lunar Occultation Centre (ILOC) 0 Eumpe-Rdand Boninsegna; Rue dc Marielnbour& 33; Geodesy md Geophysics Division 8-6381 DOURBES; Belgiuni or IOTA/ES (see back Hy&ographic Depmniait «wer) Tsukiji-5, Chuo-ku · Southern Africa--M. D. Overbeek; Box 212; Edenvale Tokyo, 104-0045 Japan 1610; Republic of South Afiica Email: [email protected] · Australia and New Zealand--Gmham Blow; P.O. Box 2241; Wellingtow New Zedmd Send Asteroidal Appulse aad Asteroidal Occdtaticm reports to: · Japan--Toshiro Hirose; 1-13 Shimoinaruko l-chome; Jan Manek, VP. for Planetary Occultation Services Ota-ku, Tokyo 146, Japan Stefmik Observatory 0 All other a-jan Manek; (see address at left) Peuin 205 118 46 Praha I, Czech Republic Email: [email protected] ONPublication Information Occu/uuion Newsletter (ISSN 0737-6766) is published quarterly Smd observations ofocculmtions that indicate stellar dkiphcity to: by the hitematicml Ckcultation Tirning Association, Inc. (IOTA), 2760 SW Jewell Ave, Topeka KS 66611-1614, USA. IOTA is a Henk Bulder Noorderstraat IOE tax exalu)t arganizatioa under sectitms 50l(c)(3) and 509(a)(2) of NL-9524 PD Buinerveen the Iutemal Reivaiue Code USA and is incorporated in the state of Tcxas. First class postage paid at Topeka KS, USA. Hinting The Netherlands by Tony Murray of Georgetoµ GA, USA. CirciUation: 400. Email: [email protected] Occu/tation Newsletter, Volume 7, Number 3; November 1998 3 International Occultation Timing Association, Inc. (IOTA) MOONLIMB - New Lunar Limb Data &om Occultation Observations (Dieunar Butma", ZeunastraBe 7, D-091I7 Chenmitz) ,.' Introduction: Occultaticm obsavations have revealed tiuie and time again that the Watts' Charts, though being the only coinprehensive sourcefor hmarlhitb datit am seriously iii emjrhllnauycases. Regrettably, grazh'g occultatian expediUcms often suGeredhom havMg no contacts due to bad prohk predictions. Thanks to the progress in positional astronomy during the last years very precise lunar ephemerides md sUlar positims are available. Theyr'ender tbe Iiinb conmions to be the most inaccurate componem in pMicting and analyzing occultatitms. MOONLIMB is the first known project to derive ilew limb correctiow hem accukatimis at a comptUensive extent. It is primarify moby DietmarButtnamithconsiderabk=^mons 6tom ReiiiholdBiichner md Eberhard Riedel all meuibers ofIOTA/ES. Principle of golution: The nl8ul idea ofMOONLIMB is to evaluate alE available observations oftota1 and grazi11goccultations witlU acouuncm aimlysis usingthe sainedatabases anddg(nthns hithisrndhcdthe data Hom graze expeditions am not consideM ody wi&in one particularcase, but theycb cUmhlLlarcaEupkmanQne mother. The creation of!iinb data is quite mdepmdalt hum the Watts charts, i.e. it is not a partial or total correcUm of Watts data. This enables a coucise soluticm without all oonMsing mpirical corrections. For each observation the residual to a cimlar lunar limb is takeii as a possible limb conecticm. Eu this µrucedure the positNms of the stars atdoftheMcm are cxmsidenaltobe hee of any error. Even ifthis may be ucjt quite correct, it provides a defiaed relation to the modem sysmofastmmiicmd constants and allows correct predictions by programmes uskg the same constmts. The profile nccmstruction is made iu the same way as the observations were achieved and as the data are needed for fiiture pmlictions, namely as a specihc view of die limbfora given hbraticmat a givmWattsmgk (WA). This is a canect solution of the 3-D-pmblem, whereas the sometime used P-D- systein is only a 2-D-approximaumL Obxrvation data base: Forthe hrsttwovasions ofMOONLIMB the followMg data collected and provided by the ILOC were used. Time span: 1972-1993 Total number of observations provided by the ILOC: ]53,991 Number of observaUons ranaining after the initial error checks: 144,333 Number of observations ±30° around the N/S poles: 29,809 Number ofobservatiow used: 10,166 (includiiig 8,316 knoyn graze contacts) Nuinber ofdaived pTofde points: 5,010 Number of recxmstructed proMe segnents: 182 The evaahlationshaveb=liautedto the polar regions (WA ±30° around the poles) because limb data onlyin these regicms are needed for grazing occultation predictions. The observations are rather unevedy distributed resulting hum mare disappearaaces thm reappearaitces, fixm occultations of bright stars and of star clusters like the Pkiades. Cmpared to the Watts charts with their evenly distributed points in a 0.2° grid oflibration aud WA the cuwent MOONLIMB set contains only 0.1 %of points. But the muchhigher number of points in the Watts data files feigns a none exi&g resolution because the data there are pmly inter- or emapolated over intervals ofsem!degrees. The 1° gridforthe HMationsusdl by MOONLIMB causes no real loss in prohle Tesolutioa butneeds much fewer observations. Redhation of the profile =onstru¢tma: The task was performed Iii three dearly distinguiShed steps: a) detailed emir checks in the observation data base (by R.
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