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Lunar Occultations of Close Double and Kepler2 Stars in October 2016 for Australia and NZ


The list shows occultations of possible double stars during October. 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 October 2016 and visible from parts of Australia or New Zealand are listed. 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.

NEW - ARCHIVING OF 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
Oct      No    v    ill      magnitudes sepn    PA?  OCC #    Visibility
 3 D    2043  6.5    5+ : **  7.4  7.4  0.10"  90.0  OCc  16  ,AkChW
 5 D    2279* 6.1   16+ : **  7.0  7.0  0.10"  90.0  OCc1485  BCMRS,ChI
 7 d  160580  8.7   32+ : AB  8.8  9.4  8.4"  194.2  HJ 2086  ,AkW
      160580:  B star is 160579
 7 d  160598  9.0   32+ : **  9.9  9.9  0.10"  90.0  OCc  11  ,AkChIW
 7 d  160661  9.2   33+ : AB  9.3 11.8  2.3"  251.0  DON 847  R
 7 D  160678# 7.6   33+ : Aab 8.2  8.8  0.10" 200.3  YSC 158  BCMRS,AkChIW
                        : AB  7.7 10.1  0.74"  91.8  HDS2485  BCMRS,AkChI
 7 d  1606863 9.3   33+ : AB  9.5 11.3  0.19" 130.0  HDS2486  BCMS
 8 d   *** Kepler Stars occulted, light curves are desired    BCRS,AkChIW
 8 d  161463# 8.4   42+ : AB  8.6 10.1  0.10" 117.3  CHR 236  BR
 8 D    2686  5.1   43+ : Aab 6.0  6.0  0.10"  90.0  OCc  22  M
 9 d   *** Kepler Stars occulted, light curves are desired    BCRS,ChIW
 9 d X 45703 10.0   51+ : AB 10.7 10.9  0.50"  93.0  TDT1329  ,AkChIW
   *** is a Kepler2 star {ID = 219122150}
 9 d X 45748  9.6   52+ : AB  9.7 10.1  1.8"    3.6  HU  262  BR,AkChIW
   *** X 45748 is a Kepler2 star {ID = 219031523 }
       X 45748:  B star is X166346
   *** X166346 is a Kepler2 star {ID = 219039768}
 9 d X 45924  9.7   53+ : AB 10.4 10.5  0.64"  50.2  HU  265  CMS
 9 D    2826*?3.9   53+ : **  4.2  6.7  0.04" 325.5  OCc 543  R
 9 d    2830  7.1   53+ : AB  6.9 13.0  5.0"  203.4, RST3223  BCM,AkChIW
 9 d  162584  9.1   53+ : **  9.6 10.5  0.02" 234.4  OCc 521  CMS
 9 d  162611  8.6   53+ : **  9.6  9.9  0.15" 228.0  OCc 475  CM
10 D  163418  7.5   63+ : AB  7.5 11.6  0.76"  71.3  HDS2894  BCMRS,AkChIW
11 D    3083# 7.3   72+ : AB  7.3 10.0  3.5"  184.6  STF2752  BCR
        3083:  B star is X177919
11 d    3109  6.6   74+ : AB  6.7 10.9  0.50" 253.4  YSC 118  R
11 d  164253* 9.1   74+ : **  9.4  9.4  0.10" 111.0  OCc 972  M
12 d  164784# 8.4   81+ : **  8.9  9.5  0.05" 234.0  OCc1670  ,ChIW
12 d    3226# 8.3   82+ : AB  9.85 8.62 0.19" 185.0  RST4095  ,ChIW
12 d   *** Kepler Stars occulted, light curves are desired    BCMRS,AkChIW
13 d  146348  9.0   89+ : **  9.7  9.7  0.10"  90.0  OCc 173  ,AkW
13 d  146419  8.4   90+ : AB  9.3  9.5  0.04"  69.0  HE16544  ,AkChIW
14 d  146960* 8.6   96+ : **  9.5  9.5  0.30"  90.0  OCc 125  BCMRS,AkChIW
14 D    3519  7.6   96+ : **  8.2  8.7  0.05" 269.0  OCc 126  BR
15 d   *** Kepler Stars occulted, light curves are desired    BCMRS,AkChIW
15 d  109439  8.8   99+ : **  9.4 10.0  0.05"  65.0  OCc1029  ,Ak
15 d X  1177? 8.5   99+ : AB  9.45 9.68 1.62" 231.3  HDO  37  BCMRS
   *** X  1177 is a Kepler2 star {ID = 220331205}

18 r   93652  9.2   91- : **  9.6  9.6  0.05" 116.0  OCc1224  BS
   *** 93652 is a Kepler2 star {ID = 210510363}
18 r   *** Kepler Stars occulted, light curves are desired    BCRS,AkChIW
18 r X  5224  9.5   90- : **  9.9 10.6  0.48" 101.4  OCc 617  R
19 r   94294  7.6   82- : **  8.7  8.7  0.10"  90.0  OCc  27  CM
20 r   95001* 8.1   73- : **  9.1  9.1  0.10"  90.0  OCc  28  ,AkChIW
20 R   95127  7.2   73- : **  8.4  8.4  0.02"   0.0  OCc 450  BR
20 r   95160  9.4   72- : Aab 9.6 11.7  0.09" 153.9  HDS 823  BCMRS
20 r   95183  9.2   72- : AB  9.3 11.3  0.51"  66.4  A  2443  BCMRS
20 r   *** Kepler Stars occulted, light curves are desired    CM
21 r    1060  7.3   62- : **  8.2  8.2  0.03"  30.0  OCc1340  BCMS,AkChIW
21 r   96343# 8.7   62- : AB  9.0  9.9  0.59" 270.4  BU  299  BR
   *** 96343 is a Kepler2 star {ID = 202059435}
21 r   96378* 8.1   62- : **  8.9  8.9  0.20" 100.0  OCc1342  BCMRS
21 r   *** Kepler Stars occulted, light curves are desired    BCMRS
22 r   97419  8.8   51- : AB  8.9 11.1  0.50" 282.0  HDS1133  BCRS,AkChIW
23 r   98220! 8.7   40- : **  9.3  9.6  0.05" 118.7  OCc1674  BCMS,Ak
   *** 98220 is a Kepler2 stargram {ID = 211682657}
23 r   *** Kepler Stars occulted, light curves are desired    CMS,ChIW
26 r   *** Kepler Stars occulted, light curves are desired    BS

======================================================================

Visibility codes:
Australia: B Brisbane, C Canberra, M Melbourne, R Rockhampton, S Sydney

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

==================================================================

Reporting Your Observations

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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