The list shows occultations of possible double stars during June. 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 June 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 Jun No v ill magnitudes sepn PA? OCC # Visibility 2 d 118888 9.6 57+ : AB 9.9 10.6 0.89" 146.4 HEI 851 ,AkChIW 2 d 118987 8.3 60+ : AB 8.3 12.9 1.9" 128.3 J 87 CMST *** 118987 is in the Kepler2 program {ID = 201777168} 2 d *** Kepler Stars occulted, light curves are desired BCMRST 3 d *** Kepler Stars occulted, light curves are desired CMS,AkChIW 4 d X 35802 10.0 77+ : AB 10.6 10.7 0.50" 308.0 TDS8701 ,Ak 4 d 139224 9.3 78+ : ** 9.9 9.9 0.10" 141.0 OCc 642 BCMST,AkChIW 5 d *** Kepler Stars occulted, light curves are desired CMS,AkChIW 6 d 2113# 7.6 92+ : AB 7.92 9.21 0.42" 310.5 HU 141? BCST,AkChIW 7 d 159305 9.3 96+ : Aab 9.6 9.6 0.10" 90.0 OCc 21 BR,Ak 7 d 159415# 8.2 96+ : AB 8.78 9.09 0.04" 101.6 HDS2210 CMS,AkChChW 8 d 159822 7.8 99+ : ** 8.6 8.6 0.10" 90.0 OCc 18 BCST,AkChW 8 d *** Kepler Stars occulted, light curves are desired ,AkChIW 8 d 2365 7.3 99+ : AB 7.60 8.78 0.27" 51.9 RST3950? ,ChIW 9 d *** Kepler Stars occulted, light curves are desired ,Ch 10 r 160980 7.9 99- : ** 8.4 8.4 0.05" 60.0 OCc1522 BR 10 R 2596 7.5 99- : ** 0.04" 163.0 OCc1523 BCMRST,AkChW *** 2596 is in the Kepler2 program {ID = 227049676} 10 r 161033 9.6 99- : Aab 9.8 9.8 0.40" 87.0 OCc 537 BCRST,Ak : AB 9.7 11.5 9.7" 284.3 B 2431 BCRST,Ak 10 r 161043 9.1 99- : ** 9.9 9.9 0.10" 53.0 OCc 536 CMST,AkChIW 10 r 161083 9.5 99- : AB 9.9 10.0 0.40" 123.3 A 2258 BR 10 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 10 r X152648 8.6 98- : 8.6 9.4 7.7" 120.6 OCc1538 M 11 r 161872 8.0 96- : ** 9.0 9.0 0.05" 40.0 OCc 454 BCMST,AkChIW 11 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChW 11 R 2733* 6.8 96- : ** 7.2 7.2 0.20" 90.0 OCc 455 BCMRST,AkChIW 11 r 162033 8.8 96- : ** 9.0 10.0 0.25" 53.0 OCc1559 BCMRST,Ak 11 r 162065 9.0 96- : ** 9.5 10.5 1.0" 46.0 OCc 346 BRST *** is in the Kepler2 program {ID = 218160323} 11 R 2773 6.2 96- : AB 6.2 9.0 8.2" 90.0 HJ 5082 BR : BC 9.0 10.8 12.7" 128.2 HJ 5082 BR 2773: B star is X163384 13 r 2997# 7.2 86- : AB 7.94 8.04 0.28" 128.0 SEE 512? BCMST,AkChIW 13 r 163737 9.7 85- : ** 10.0 10.0 0.10" 101.0 OCc 827 BR 15 r *** Kepler Stars occulted, light curves are desired BCMRST 16 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 16 r 146534 8.1 58- : AB 8.1 10.4 4.6" 107.0 STF2980 BRST *** 146534 is in the Kepler2 program {ID = 246092072} 16 r 146575 10.0 57- : AB 10.4 11.1 0.70" 195.0 RST4718 ,AkChIW *** 146575 is in the Kepler2 program {ID = 246138854} 16 r 146607 9.1 57- : ** 9.6 9.6 0.10" 82.0 OCc 731 M *** 146607 is in the Kepler2 program {ID = 246154141} 17 R 3537 6.9 47- : ** 7.6 7.6 0.10" 90.0 OCc1134 BCMRST 17 R 15# 7.1 46- : AB 7.1 0.9" 109.0 LSC 4 R 17 r 128583 8.8 46- : AB 8.9 11.7 0.19" 342.7 HDS 9 CMST,I 18 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 18 r 109573 8.9 35- : AB 9.0 11.7 23.5" 356.1 GRV 56 BCMRST,I *** 109573 is in the Kepler2 program {ID = 220301335} 19 r 110126 9.9 26- : ** 9.8 9.8 0.10" 90.0 OCc 46 ,ChIW 19 r 110164 8.5 25- : ** 9.0 9.5 1.0" 10.0 OCc1169 BR 19 r 110161 10.4 25- : AB 10.7 11.4 0.2" 56.8 HEI 836 BCMST,AkChIW 19 r 110169 9.1 25- : AB 9.2 11.8 0.5" 24.1 HDS 250 BCMRST 19 r 110199 9.4 25- : ** 9.6 9.6 0.1" 41.0 OCc1009 BCMRST 20 r 93088 9.2 16- : ** 10.0 10.0 0.3" 21.0 OCc1010 BR 20 R 401 6.3 16- : AB 6.3 6.5 247.0 CHR 200 ,Ak 21 R 93617 8.7 8- : AB 9.21 9.40 1.2" 329.6 HO 324 BRST 93617: B star is X67423 *** X 67423 is in the Kepler2 program {ID = 210474569} 21 r *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 22 r 94120 8.5 3- : AB 6.9 10.8 0.07" 283.3 PAT 17 ,W *** 94120 is in the Kepler2 program {ID = 247056735} 26 d X207403 11.2 7+ : AB 11.3 11.3 7.8" 307.5 HJ 450 CMS *** X207403 is in the Kepler2 program {ID = 211845945} 26 d X109512 10.2 7+ : AB 10.2 10.3 0.9" 32.9 COU 953 ,AkChIW X109512: B star is S97813 26 d X109716 9.9 7+ : AB 9.9 10.7 2.6" 138.6 BRT2387 BR X109716: B star is X109717 *** X109716 is in the Kepler2 program {ID = 211811403} 26 d *** Kepler Stars occulted, light curves are desired BCMRST,AkChIW 27 d 98570 9.2 14+ : ** 9.8 9.8 0.1" 90.0 OCc 198 ,AkChIW 29 d X 17027 9.6 33+ : AB 9.6 11.7 2.2" 205.7 BU 791 BCMRST 30 d X 18086 10.0 43+ : AB 10.6 10.8 0.4" 96.0 TDS8237 M 30 d *** Kepler Stars occulted, light curves are desired ,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 A double number followed by ° indicates double has a known orbit.
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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