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IOTA: July 21 asteroid occ'n of 31 Psc in w. Europe; other events to Aug. 13
I received the following notice of upcoming asteroid occultations this morning
from David Dunham of the International Occultation Timing Association (IOTA), and wanted to pass it along. Ed Flaspoehler, President American Association of Amateur Astronomers http://www.astromax.com/ Early this coming evening (July 15th local time, 16th UT), 9.5-mag. SAO 158075 will be occulted by the small asteroid (1561) Fricke for observers in southern Mexico, northern Central America, northern Venezuela, and Trinidad and Tobago. Next week, early on July 21st, 6.4-mag. 31 Piscium will be occulted by the 95-km asteroid (773) Irmintraud as seen from a south-to-north path crossing Africa and western Europe, including Catalonia, w. France, s.w. England, and Ireland, a good binoculars event and probably the best asteroidal occultation in Europe this year. Updated information about these and other asteroidal occultations visible from North and South America, Europe, Asia, New Zealand, & Australia and other areas through Aug. 7th, and one later event, are summarized according to calculations by Steve Preston (comprehensive here only for North America; occultations of brighter stars given for other areas) and Jan Manek (for Europe) in the tables for asteroidal occultations, and then for planetary occultations, below. Updated path maps, finder charts, and other detailed information about these events can be found at the Web sites at the end of this message; Steve Preston's Web site also has path updates for South America, Australia, New Zealand, Japan, and often other areas, while Jan Manek's site covers Europe and southern Africa (but some European events are instead on Preston's site, especially trans-Atlantic events); you should consult them since I mainly list the better foreign and North American events here. Under "Approx. location", places are spelled out when they can be, but usually it is necessary to use the standard two-letter postal abbreviations for the States of the USA and provinces of Canada (for example, AB = Alberta, NB = New Brunswick, NE = Nebraska) or the two-letter country abbreviations used in Web and e-mail addresses (FR = France, DE = Germany, NZ = New Zealand, etc.). A complete list of these codes is at http://www.nwhealth.edu/it/employs/abbrev.html . "cen." or "c" means central, and small letters, with or without ".", indicate the part of the State, Province, or country, such as sCA = southern California, nON = northern Ontario, sTX = southern Texas, etc. Rarely, 3-letter airport abbreviations are used, and I use "Sib" for Siberia, NN for New England, and CS for the Canary Islands (rather than just "ES" to distinguish them from mainland Spain; can't use CI because that's Cote d'Ivoire (Ivory Coast). Often, not every place crossed by a path is mentioned, so if you are between two listed states or countries, the event may occur in your location; also, due to remaining path errors, if you are in adjacent areas, you should also watch since the actual path might occur at your location. Unless otherwise specified in the notes, the magnitude drop in case of an occultation is 1.0 or more. Those especially in the Americas are reminded that the dates and times below are U.T., and that local dates may be a day earlier. NOTE that the times are U.T.; especially in the Americas, events often occur the evening of the PREVIOUSLY-LISTED date, local time. 2004 Asteroid S t a r Date U.T. Diam., R.A.(2000)Dec. July h m m # Name km mag. h m o / Approx. location 16 1:20-:24 1561 Fricke 26 9.5 13 39.9 -10 41 sMX,GT,HN,NI,nVE,TT 18 4:22-:31 41 Daphne 174 11.9 21 12.5 +03 23 NF,NS,MA,VA,AL,TX,MX 19 4:11-:18 61 Danae 82 11.3 19 38.3 -41 29 nBR,sVE,HN,eMX,sTX,NM 20 4:26-:27 1404 Ajax 81 11.6 14 05.6 -32 34 MX-Hermos.; sw&ne NM 20 16:23-:33 3 Juno 233 7.6 18 55.9 -05 45 seSib,n&wCN,nIN,PK,SA 21 1:08-:19 773 Irmintraud 95 6.4 00 02.4 +08 57 GA,DZ,eES,wFR,swUK,IE 21 3:15-:19 235 Carolina 57 11.7 19 07.3 -32 26 BS,sFL,nCU?,sTX?,nMX 21 11:08-:25 481 Emita 116 11.4 21 04.4 -30 23 nNM,sAZ,nwMX,nAU-Q,NT 21 19:10-:24 856 Backlunda 52 9.5 18 43.4 -15 43 wChina,nwIN,SO,Angola 22 7:40-:61 494 Virtus 85 7.2 18 30.0 -33 03 BR,wPY,nAR,nCL,AU-seQ 23 7:53-:53 554 Peraga 95 9.5 11 29.3 +00 44 AU-sTas.;NZ-StewartI? 24 5:01-:06 1843 Jarmila 25 11.5 21 11.3 -05 09 sGA,MS,nTX,NM,AZ,cCA 25 3:49-:56 163 Erigone 72 11.6 17 13.6 -16 44 sNC,sSC,sGA,wFL,Mex. 25 10:01-:02 924 Toni 85 11.5 19 30.5 -13 39 nAR,sOK,n&wTX,nwMex. 25 10:07-:08 270 Anahita 50 11.3 19 31.6 -18 21 WY,seID,nUT,nNV,nCA 26 3:35-:37 419 Aurelia 129 9.1 14 11.6 -11 54 sMX,nGT,nBZ,JM,HT,DO 26 11:59-:106 1082 Pirola 43 7.2 22 50.8 -07 19 sBaja,AU-cQ.,sNT 26 16:53-:56 1685 Toro 12 9.7 01 15.5 +36 27 seSib.,sKorea,nwTW? 26 20:06-:08 419 Aurelia 129 9.6 14 12.6 -11 58 TR,Greece,sIT,Spain 27 0:26-:49 363 Padua 52 8.9 22 18.6 -20 16 nIR,IQ,nSA,SD,CM 27 22:11-:21 1719 Jens 18 7.8 21 27.5 -20 13 wCN,nIR,nIT,nFR,sUK 29 2:11-:06 418 Alemannia 34 11.4 17 35.0 -18 11 cFL,sMS,cLA,neTexas 29 17:10-:15 1832 Mrkos 30 8.4 01 27.9 +25 41 AU-sWA,NT;PNG,Micron. 30 11:01-:03 626 Notburga 100 11.4 21 59.2 -35 57 seCO,NM,AZ,nBaja,SDO? 31 9:29-:30 373 Melusina 95 11.5 05 28.8 +34 52 s.Mexico,cen.Florida 31 9:45-:47 304 Olga 67 10.2 20 20.3 -01 16 cen.Florida,c.Mexico Aug. 2 2:03-:04 1945 Wesselink 12 5.5 02 24.8 +10 37 South Africa 3 12:00-:00 1519 Kajaani 26 8.8 19 03.1 -41 53 cen. Honshu, Japan 4 3:51-:57 2060 Chiron 166 13.8 19 30.4 -14 16 MR,GF?,GY,VE,CO,EC 4 8:35-:37 313 Chaldaea 96 12.2 19 39.1 -06 29 ON,WI,sMN,nCO,sNV,sCA 5 18:56-:62 36215 1999TG214 12 4.5 23 42.7 -14 33 Australia-nQ.,sNT,sWA 6 9:36-:36 756 Lilliana 71 10.0 06 19.4 +09 16 sSC,sGA,sAL,sMS,cLA 7 4:20-:40 838 Seraphina 59 11.7 17 50.0 -13 22 sQC,MI,sWI,IA,CO,cCA 7 9:07-:10 1625 The NORC 28 11.3 21 16.4 -18 52 nFL,sTX,nMX,s.Baja 7 9:54-:73 989 Schwassm. 12 7.4 21 32.2 +10 55 nChile,AU-n.Qld.,nNT 7 10:47-:48 632 Pyrrha 16 5.6 02 56.4 +18 01 nPeru,sEC,seColombia 13 11:23-:24 1685 Toro 12 7.9 04 49.7 +49 35 nBaja,AZ-nTUC,NM-sABQ Notes for Individual Events: Information for several other updated occultations from xxxxx to Aug. 7 are on Steve Preston's web site; they will be summarized in a future message. July 16: The star is SAO 158075, spectral type K0. July 18: The mag. drop will be only 0.34, which we should be able to find in video records, but that won't be noticable visually. The n. limit is over Boston, New York City, Knoxville, & just n. of Philadelphia, Baltimore, & DC; Austin, TX is just n. of it and San Antonio is s. of it. Close to the s. limit are Norfolk, Charlotte, Atlanta, Baton Rouge, & Corpus Christi. July 19, Danae: The mag. drop will be 0.8. July 20, Juno: The star is SAO 142809 = HIP 92918, sp. type G5. The path also crosses the United Arab Emirates and se Iran. July 21, Irmintraud: The star is 31 Piscium = ZC 3538 = HIP 186, spectral type A5. Europeans are making a major effort to observe this outstanding event, possibly the best of 2004. The updated path is just over 3 path-widths east of Goffin's path plotted on pages 103 and 105 of the March issue of Sky and Telescope. July 21, Backlunda: The star is SAO 161763, spectral type K0. July 22: The star is SAO 210235, spectral type A3. The star is too bright for UCAC2 and is not a HIP star, so its position may be in error by more than the predicted amount. July 23: The star is SAO 118889, spectral type A5. July 24: The path also passes over sAL, nLA, and sNV. It passes north of Jacksonville (FL), Shreveport, and Dallas-Ft.Worth, all of which could have an occultation. Albuquerque is on the n. edge of the updated path, Las Vegas is in the middle, Fresno is at the s. edge, and San Jose, CA is at the n. edge (so the whole S.F. Bay area has a chance for an occultation). July 25, Anahita: The mag. drop will be 0.36, needing video. July 26, Aurelia (1st): The star is SAO 158413 = HIP 69348, sp. type K5. July 26, Pirola: The star is SAO 146347 = HIP 112813, sp. type K0. July 26, Toro: This is a near-Earth asteroid in an orbit with a 5:8 resonance with Earth's orbit. July 26, Aurelia (2nd): The star is SAO 158424, spectral type K0. The updated path is about 2 path-widths south of the path shown on p. 103 of the March issue of Sky and Telescope. July 27, Padua: The star is SAO 191042, spectral type A3. July 27, Jens: The star is ZC 3143 = SAO 190356 = HIP 105953, spec. type K1III. The path also passes over nPK,AF,TR,sHR,nCH, and nIE. July 29, Mrkos: The star is SAO 74737 = HIP 6830, spectral type F5. Aug. 2: The star is xi Arietis = ZC 354 = HIP 11249, spec. type B5. Aug. 3: The star is PPM 324717 (non-SAO), spectral type K0. Aug. 4, Chiron: Chiron is probably a giant comet rather than a rocky asteroid since previous observations show a coma and jets. Aug. 5: The star is omega2 Aqr = SAO 165842 = HIP 116971, spectral type B9.5V. It has a 9.9-mag. companion 4.8" away in PA 80 deg. The updated path, still with uncertainty much larger than the narrow path-width, is close to my path shown on p. 107 of the March issue of Sky and Telescope. Aug. 7, Seraphina: The path also passes over sON (just nw of Ottawa and over the Bruce Peninsula), nwIL, NE (Omaha), sUT, & sNV just n. of Las Vegas. Quebec City is at the s. limit while Milwaukee, Fresno, and Omaha are near the center, and Denver and Santa Cruz are near the n. limit. Aug. 7, Schwassmannia: The star is SAO 107209 A = HIP 106337 A. It has a 9.1-mag. companion 0.10" south of the primary that will be occulted along a path north of that for the primary, but since the pair will not be resolved, the occultation of the 2nd star will not be observable. The primary star will appear to drop in brightness by 1.7 mag. to the mag. 9.1 of the secondary when it is occulted. Aug. 7, Pyrrha: The star is rho3 Ari = ZC 433 = HIP 13702, sp. F5. Aug. 13: See July 26, Toro. The star is SAO 39780 = HIP 22433, spectral type A3. The path also crosses the west end of the Oklahoma panhandle and, in brightening twilight, diagonally crosses Kansas from sw to ne, passing just n. of Topeka. This prediction by Steve Preston is not yet on his Web site but can instead be found at http://iota.jhuapl.edu/0813_1685_2792.htm . For more about these events, see Steve Preston's site at http://www.asteroidoccultation.com for updated path maps and other details. Also, see the asteroidal occultation section of the main IOTA site at http://www.lunar-occultations.com/io...ds/astrndx.htm for annotated versions of E. Goffin's good finder charts for North American events and links to sites covering other areas. For Europe, see also L. Vasta & J. Manek's site at http://mpocc.astro.cz/mp . I just list the events in the table above; see the Web sites for the updated maps to see the closest approach time for your location, and more accurate coordinates of the star and its designation. You must display this message with a fixed-space font such as Courier for the columns of the table to line up. The U.T. time range is given, with only the minutes of the hour given for the end time (subtract 60 and add 1 to the hour for end minutes greater than 59). Good luck with YOUR observations of occultations. David Dunham, 2004 July 15, 5h UT |
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