The list shows occultations of possible double stars during May. Although the main emphasis remains on stars with separations < 2", now that the more detailed lunar limb profile from LOLA is available, some wider pairs are included. Doubles predicted to be occulted by the Moon during May 2017 and visible from parts of Australia or New Zealand are included. The listing is a very abbreviated version of predictions produced by Occult plus an indication of the region of visibility. Observers need to generate their own precise predictions using Occult.
The list below is generated by OCCULT for a 25cm telescope. Some of the events could be beyond the reach of smaller telescopes. Observations of all pairs in the list are highly desirable. Those showing an OCc number have been reported as non-instantaneous at a lunar occultation. Confirmation or otherwise of any double nature is wanted.
*** Kepler stars: the nights on which they are occulted are indicated. Individual Keplers are only shown if they are also a known or possible double. Light curve of occultations of all Kepler stars are desired.
Please send reports of all observations of these stars to Brian Loader at palbrl@clear.net.nz, including any made in earlier months and not so far reported. And of course if you observe a stepped event for a star, which is not a known double, please report this. More details about reporting follow the predictions.
ARCHIVING OCCULTATION LIGHT CURVES
For ALL lunar occultations: single, double and Kepler K2 stars a csv file should be prepared for archiving. This can be done through the OBSERVATIONS EDITOR of OCCULT.
It will be necessary to generate a light curve using LIMOVIE and save or copy its csv file. You will also need to note the time, hh:mm:ss.sss of one frame and the corresponding frame number.
Then in the Observations Editor select the entry for the star and use the menu bar option to create a Light Curve Report. Follow the instructions on the new screen which appears. There is a help file. It is suggested that light curve reports be emailed in batches rather than singly. They are sent directly to Dave Herald from the program.
******************************************************************************** d P Star Mag % Double details WDS or Area of May 1 D 96610# 8.1 30+ : AB 8.2 10.1 0.52" 61.0 COU 925 ,AkChW 1 d 96739 8.4 31+ : ** 9.1 9.1 0.05" 350.0 OCc1351 BCMRST,AkChIW 1 d 96790 8.9 31+ : ** 9.7 9.7 0.10" 90.0 OCc 31 BCMRST 1 d 96784 9.2 31+ : ** 9.8 9.8 0.10" 90.0 OCc 30 BCMST 2 d 97651 9.3 41+ : ** 9.7 9.7 0.10" 90.0 OCc 32 ,AkChIW 2 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 2 d 1255 8.2 42+ : ** 9.0 9.0 0.05" 350.0 OCc1385 BCMRST 5 D 1609 4.6 74+ : AB 4.7 11.0 4.9" 267.9 KUI 54 BCRST 6 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 7 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 8 D 1923 7.0 94+ : AB 7.0 10.9 0.40" 268.5 HDS1881 BCMRST,AkChIW 8 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 9 D 2035 7.2 98+ : AB 7.0 8.1 132.0 CHR 221 BCMRST,AkChW 9 d 139803 8.5 98+ : AB 9.38 8.98 0.51" 35.9 BU 139 BCMRST,AkChW 9 D 2043 6.5 98+ : ** 7.4 7.4 0.10" 90.0 OCc 16 BRST 11 r 159415# 8.2 100- : AB 8.78 9.09 0.04" 102.3 HDS2210 ,AkChW 11 r 2279* 6.1 99- : ** 7.0 7.0 0.10" 90.0 OCc1485 M 12 r 2365 7.3 98- : AB 7.60 8.78 0.27" 52.1 RST3950 ,AkChIW 12 r *** Kepler Stars occulted, light curves are desired CMRST,AkChIW 12 r X 41431 8.9 97- : AB 9.7 9.8 3.4" 85.0 SKI 10 CM 13 r 2495# 6.0 94- : AB 6.34 7.56 2.42" 263.5 BU 126 CMST,AkChIW 2495 B star is X141441 : AC 6.34 11.2 12.1" 137.5 BU 126 CMST,AkChIW *** 2495 is in the Kepler2 program {ID = 233441374} 13 r 160513 8.6 94- : ** 9.2 9.2 0.10" 90.0 OCc 14 BCMST,AkChIW 13 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 14 r X 43398 7.4 89- : ** 8.8 8.8 0.05" 350.0 OCc1528 ,AkChIW 14 r 161179 9.2 88- : AB 9.4 9.8 7.4" 85.9 VAT 2 ,AkChIW 14 r X152648 8.6 88- : 8.6 9.4 7.7" 120.6 OCC1538 BCMRST,AkChIW 14 r X152651 9.4 88- : 9.4 8.6 7.7" 300.6 ,AkChIW *** X152651 is in the Kepler2 program {ID = 227173061} 14 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 14 r X152851 9.4 88- : AB 9.5 11.3 6.7" 46.6 B 2859 ,AkW : AC 9.5 12.3 11.5" 148.8 STN 108 ,AkW *** X152851 is in the Kepler2 program {ID = 227065848} 14 r X 43463# 8.3 89- : ** 8.5 10.8 0.25" 121.5 OCc1822 ,I 14 r X 43583 8.1 88- : AB 8.1 12.7 4.6" 151.5 RST3167 BCMRST,AkChIW 14 r 161229 8.8 88- : ** 9.6 10.6 0.05" 296.0 OCc 566 BCMRST,AkChIW 14 r 161245* 8.9 88- : AB 8.9 11.9 2.5" 257.0 B 1885 BCMRST,AkChIW 14 r X153948# 9.4 88- : ** 9.9 10.5 0.07" 54.0 OCc1748 BCMRST,AkChIW 14 R 161255* 7.4 88- : Aab 6.8 9.3 265.0 SNA 85 BCMRST,AkChIW : AC 6.7 12.6 5.1" 88.0 SNA 85 BCMRST,AkChIW 14 r 161257*?7.7 88- : ** 9.0 9.0 0.05" 350.0 OCc1539 BCMRST,AkChIW 14 R 2658# 5.8 87- : ** 6.2 6.2 0.05" 350.0 OCc1542 MS,AkChIW 14 r 161399 9.2 87- : AB 9 8 10.7 0.10" 192.0 CHR 235 ,AkChIW 14 r 161400# 9.2 87- : ** 9.4 10.1 0.20" 228.0 OCc 474 BCMRST,Ak 15 r *** Kepler Stars occulted, light curves are desired BCMRST,ChW 15 r 2764# 6.4 82- : ** 7.1 7.1 0.10" 90.0 OCc1561 ,AkChIW 15 R 2787? 6.3 81- : AB 6.35 9.16 0.70" 108.6 HDS2710 BCMRS,AkChW *** 2787 is in the Kepler2 program {ID = 218473951} 15 R 2794# 6.6 81- : ** 7.5 7.5 0.10" 90.0 OCc1569 BCRST,AkW 16 r 163176* 9.3 73- : AB 9.5 0.40" 94.0 ARU 18 BRT 16 r 163192 7.9 72- : ** 9.1 9.1 0.25" 90.0 OCc 340 BCMST,AkChW : AB 8.0 8.3 15.8" 134.8 HJ 2918 BCMST,AkChW 16 r 163194 10.0 72- : AB 10.1 0.40" 159.0 ARU 19 BR,Ak 17 r 3029 7.0 64- : ** 7.7 7.7 0.10" 90.0 OCc 290 ,AkChIW 17 r 163882* 9.3 64- : ** 9.9 9.9 0.10" 83.0 OCc1007 ,AkChIW 17 r 164051 9.0 62- : ** 9.7 9.7 0.05" 109.0 OCc1006 M 18 r 164652 9.1 53- : AB 8.7 10.0 0.56" 77.8 HWE 58 R : CA 9.1 8.7 4.0" 262.1 STF2826 R 19 r 165111 8.7 44- : Aab 8.8 11.4 0.40" 71.0 HDS3183 ,Ak *** 165111 is in the Kepler2 program {ID = 206189649} 19 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 19 r 3301 8.8 44- : AB 8.8 11.7 8.7" 292.5 BU 174 ,ChIW 19 R 3325 6.9 42- : ** 7.5 7.5 0.004"350.0 OCc1628 BRT *** 3325 is in the Kepler2 program {ID = 206225297} 20 r *** Kepler Stars occulted, light curves are desired BCMST,AkChIW 20 R 3472 6.9 31- : ** 7.8 7.8 0.10" 90.0 OCc1644 CMRT *** 3472 is in the Kepler2 program {ID = 246231360} 20 r 146777 9.2 31- : AB 9.3 11.2 0.76" 71.8 HDS5537 R 21 r X 376 9.7 22- : AB 9.8 11.0 3.5" 167.0 BU 777 ,ChIW 21 R 55# 6.4 21- : AB 6.47 8.91 0.40" 281.0 HDS 61 M 22 R 109800 7.6 13- : AB 7.7 10.8 1.15" 336.7 BAR 2 CMS 109800: B star is X58211 22 r *** Kepler Stars occulted, light curves are desired ,AkChIW 23 r X 3092 10.0 6- : AB 10.5 10.8 0.60" 145.0 HEI 438 CMST 23 R 110398 9.3 6- : ** 9.1 10.1 0.20" 277.0 OCc1179 ,AkChIW 24 r 464* 6.1 2- : AB 6.1 0.50" 23.0 CHR 8 ,Ak 27 d X 7660 9.0 3+ : ** 9.1 11.3 0.01" 257.0 OCc1279 M 28 d 78788 8.4 9+ : ** 9.2 9.2 0.10" 104.0 OCc 890 B,I 29 d 97350 9.1 17+ : AB 9.2 12.7 7.6" 320.2 COU 44 BR 29 d 97409 9.6 18+ : AB 10.3 10.5 0.50" 110.0 TDS5380 BR 30 d 98189 9.2 26+ : AB 9.7 10.2 0.30" 62.7 A 2474 BST,AkChW 30 d 98193 9.5 27+ : ** 9.9 9.9 0.10" 331.0 OCc 806 BRT,AkW *** 98193 is in the Kepler2 program {ID = 211736487} 30 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 30 D 98223 8.3 27+ : Aab 9.0 9.2 0.25" 170.7 TOK 196 BCMRST,AkChIW 98223 Ab is X112300 : AB 9.0 9.2 1.7" 167.4 AG 338 BCMRST,AkChIW *** 98223 is in the Kepler2 program {ID = 211750200} 30 D 98229 8.1 27+ : ** 9.2 9.2 0.10" 345.0 OCc 807 BRT,Ak *** 98229 is in the Kepler2 program {ID = 211721876} 31 d X 14772 10.1 37+ : AB 10.2 10.8 2.5" 343.2 HEI 58 ,AkChIW ====================================================================== Visibility codes: Australia: B Brisbane, C Canberra, M Melbourne, R Rockhampton, S Sydney, T Tamworth NZ (following a ,) Ak Auckland, W Wellington, Ch Christchurch, I Invercargill. ---------------------------------------------------------------------- Stars with previous occultation observations: #: Observations indicating double - these need further checking *: Observations not showing double - need confirmation !: Recent video discoveries - confirmation needed. ?: Uncertain double observation, confirmation or otherwise needed ==================================================================
The most convenient way of reporting is to use Dave Herald's OCCULT which has a Double Star report option in the Observations editor. Before using it, generate a light curve with Limovie and copy to the clip board. Your graph will be attached to the email which you can then send to palbrl@clear.net.nz.
Otherwise in reporting please include your name and positional data as for other occultations reports, also your telescope type and method of observing and timekeeping.
For each event give the star name and the times of each step of the event with the corresponding accuracy. The limb PA, Rv and Cct of the event would also be useful.
In addition to measures of the PA and separation of binary stars, there is also a need for an estimate of the magnitude difference. An estimate of this can be made from the step sizes shown by Limovie data. So if possible a determination should be made of the size of each step together with an estimate of accuracy.
Please also report cases where a double event is predicted but none detected. These are especially likely with stars shown with an OCc designation
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