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


The list shows occultations of possible double stars during September. 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 September 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
Sep      No    v    ill      magnitudes sepn    PA?  OCC #    Visibility
 4 D    1869# 6.2    8+ : AB  6.18 8.78 0.65" 181.9  AGC   5  BRS
        1869:  B star is X125304  
 5 d   *** Kepler Stars occulted, light curves are desired    BCRS,AkChIW
 5 D    1978  6.6   14+ : **  7.4  7.4  0.10"  90.0  OCc1454  BCMRS,ChIW
 5 d  139582* 8.4   15+ : **  8.9  9.5  0.04" 129.0  OCc1023  CMRS
 5 d  139592  7.7   15+ : **  8.1  8.7  0.02"  97.0  OCc1024  M
 7 D    2184  7.3   29+ : AB  7.0       0.20" 153.5  CHR  44  ,Ak
 7 d X 39439 10.3   30+ : AB 11.1 11.2  0.18" 288.8  HDS2167  R
 8 d   *** Kepler Stars occulted, light curves are desired    BCMRS
 8 d  159822  7.8   40+ : **  8.6  8.6  0.10"  90.0  OCc  18  BR
 9 d  160209  8.7   49+ : AB  9.2  9.6  0.7"  192.7  HU  162  CMS,AkChIW
 9 D    2447* 8.0   49+ : **  8.2  8.7  0.04" 132.0  OCc1497  BCMRS
 9 d X 41797 10.2   49+ : AB 10.9 11.0  0.30" 182.3  RST3061  BCMRS
10 D    2555* 7.5   58+ : BA 10.3  7.6  1.0"  130.5  HU  186  ,AkChW
        2555: is shown as B star,  A star X144366, mag 10.3?
10 d  160900# 9.0   59+ : AB  9.0 11.4  7.6"   69.6  ARA 448  BR
10 d  160935  9.1   60+ : AB  9.9 10.0  0.30" 168.3  A  2254  BCMRS
10 d  160994# 8.4   60+ : AB  8.8  9.8  0.40" 153.8  A  2256  M
                        :AB,C 8.4 13.9  6.8"    4.0           M
                        :AB,D 8.4 13.0  7.2"  127.6           M
11 d   *** Kepler Stars occulted, light curves are desired    BCMRS,AkChIW
11 D  161834  7.5   69+ : AB  7.75 9.0  0.40" 153.2  RST3198  BCRS
11 d X 44833  9.4   69+ : AB  9.6 12.4  0.70"   0.0  RST3200  R
12 D    2871  7.3   78+ : AB  7.2  7.4  9.9"  236.1  S   722  CMS,AkChIW
        2871:  B star is 2870
12 d  162877* 8.7   78+ : **  9.3  9.9  0.04" 252.0  OCc 530  CMS,AkChIW
13 D    2995# 6.1   86+ : AB  6.8  7.0  0.13" 143.1  FIN 336  ,ChIW
13 d X 48675  8.4   86+ : AB  9.0  9.5  3.7"   24.8  HJ 1537  BCMRS
     X 48675:  B star is X175379  
13 d  163689  9.3   86+ : AB 10.1 10.1  0.32" 110.6  RST5551  R
13 D    3015  5.2   87+ : AB  5.38 7.31 0.32" 122.6  HU  200  BCMRS,Ak
13 d  163765  8.9   87+ : AB  9.1 10.9  0.60" 279.5  RST4066  CMS,AkChIW
13 d  163793  7.8   87+ : AB  7.8 11.0  2.90" 226.7  HO  135  CMS,AkChIW
14 d X 50212  9.3   92+ : AB  9.0 11.0  4.8"  255.1  HU  272  ,AkChIWW
14 D    3155  6.7   93+ : **  7.6  7.6  0.10"  90.0  OCc1605  BCMRS,Ak
14 d  164482  9.5   93+ : **  9.3 10.9  0.04" 235.7  OCc 580  C,AkChIW
15 d   *** Kepler Stars occulted, light curves are desired    BCMRS,Ak
15 d    3296  8.1   98+ : **  9.5  9.5  0.30"  90.0  OCc1626  BCMS,AkChIW
15 d    3306# 7.8   98+ : AB  7.8  8.6  8.8"  329.6  STF2913  BCMS,AkChIW
        3360:  B star is X182873
   ***  3306 is a Kepler2 star {ID = 206308169}
   ***  X182873 is a Kepler2 star {ID = 206308309}
 
17 r  109113  7.9   99- : AB  7.9 10.3  9.9"  214.2  STF  23  CM,AkChIW
17 r X   316  9.4   99- : AB 10.1 10.2  0.40"  67.0  TDS1388  ,AkW
18 r   *** Kepler Stars occulted, light curves are desired    BCMS,AkChIW
18 r  109888  9.3   95- : **  9.4  9.4  0.10"  90.0  OCc  74  BCMS
   *** 109888 is a Kepler2 star {ID = 220480623}
18 r  109901  8.7   95- : **  9.6  9.6  0.10"  90.0  OCc  75  BCMRS
   *** 109901 is a Kepler2 star {ID = 220484407}
19 r     334  8.5   89- : **  9.0  9.6  0.10" 352.0  OCc 574  BCMRS,AkChIW
19 R     352* 7.1   88- : AB  7.2 10.0  0.67"  25.0  CHR 199  BCMRS
19 R     354* 5.5   88- : **  6.3  6.3  0.05"  46.0  OCc 984  BCMRS,I
19 r   92953  8.3   88- : **  9.3  9.3  0.10"  87.0  OCc 981  BCMRS
19 r   92964  8.6   87- : **  9.5  9.5  0.10"  27.0  OCc 982  M
20 r     464* 6.1   81- : AB  6.1       0.50"  23.0  CHR   8  ,Ak
20 r   93411  8.7   79- : **  9.3  9.3  0.10"   9.0  OCc 626  R
21 r   *** Kepler Stars occulted, light curves are desired    CMS,AkChIW
21 R     636# 7.0   69- : AB  7.26 8.62 0.59"   8.4  STT  79  BCMRS
21 r   93884  9.2   69- : **  9.8  9.8  0.10" 350.0  OCc 528  BCMR,AkChIW
21 r   93901  8.1   69- : **  8.6  8.6  0.10" 205.0  OCc 527  R
21 R   93914  7.8   68- : AB  6.4  9.1  1.3"  242.1  PAT   6  BCRS
21 R   93913  7.0   68- : **  7.6 10.6  0.18" 108.8  OCc 615  BCRS
22 r     785* 9.2   59- : **  9.2 10.1  0.04" 281.1  OCc 486  ,Ak
22 r     787# 7.1   59- : AB  7.7  8.3  2.7"  164.9  STF 670  BCS,AkChIW
         787:  B star is X73437.  See also next
22 r X 73437# 8.3   58- : Bab 8.5 11.0  0.70" 161.3  COU2580  ,AkChIW
22 r X 73658  9.4   58- : AB  9.5 11.5  6.1"  308.7  COU  39  ,AkChW
22 r     800# 7.9   58- : Aab 8.22 9.3  0.26"  21.6  HDS 705  ,AkChI
23 R     947  5.2   47- : AB  5.2 11.2  6.9"  185.3  HJ 2302  ,AkChIW
23 r   95475  7.2   47- : AB  7.3 11.6  5.1"  134.6  BU  894  B,AkChIW
23 r   *** Kepler Stars occulted, light curves are desired    BR
24 r   96687  8.2   36- : AB  8.61 9.38 0.20" 331.8  CHR 217  ,Ak
25 r   *** Kepler Stars occulted, light curves are desired    BRS,AkChIW
25 r X 12461  9.3   25- : AB  9.1 10.9 17.6"  251.9  SLE 885  BCMRS
   *** X 12461 is a Kepler2 star {ID = 211767986}
26 r   *** Kepler Stars occulted, light curves are desired    BCR
26 r   98357  9.2   17- : ** 10.7 10.7  0.40"  90.0  OCc1014  ,AkChW
   *** 98357 is a Kepler2 starm {ID = 211618308}
28 r  118541  8.6    4- : AB  8.7 11.2 0.70"   3.9   HDS1550  R

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

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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