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


The list shows occultations of possible double stars during November. 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 November 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.

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 d P    Star  Mag    %         Double details        WDS or   Area of
Nov      No    v    ill      magnitudes sepn    PA?  OCC #    Visibility
 2 D    2365  7.3    6+ : AB  7.60 8.78 0.27"  53.4  RST3950  B,AkChW
 2 d  159944 10.4    6+ : AB 10.4 11.6  8.4"    2.2  J  1591  S,ChI
   *** 159944 is a Kepler2 star {ID = 205641904}
 3 D#   2495  6.0   11+ : AB  6.34 7.56 2.42" 263.5  BU  126  BCRS,AkChIW
        2495:  B Star is X141441
 3 d  160486  9.4   12+ : AB  9.6 12.3  5.1"  327.5  ARA 249  BRS
 4 d   *** Kepler Stars occulted, light curves are desired    BCMR,AkChIW
 4 d X150675 10.7   18+ : AB 10.7 12.5  8.8"   56.6  ARA 453  ,Ak     
 4 d X151837 10.9   18+ :    10.9 11.2  1.1"  240.6  OCc1531  MS
 4 d X151825  9.7   18+ : AB 10.1 11.8  6.1"  278.7  HJ 2820  BCRS
     X151825:  B star is 151821              
   *** X151825 is a Kepler2 star {ID = 227345588}             
 4 d X152311 10.7   18+ : AB 10.8 11.7  2.2"  253.0  TDT 739  BCMS
 4 d X152730#10.2   19+ : AB 10.7 11.0  0.50"  91.0  TDT 754  CM
 4 d X152961 10.4   19+ : AB 10.6 11.3  1.3"  250.0  TDT 759  CM
 5 d   *** Kepler Stars occulted, light curves are desired    CMRS,AkChIW
 5 d  162160*  8.4   27+ : **  9.4  9.6  0.12"  26.0  OCc 546  BCMS,AkChI
 5 d  162183  8.5   27+ : **  9.2  9.2  0.10"  94.0  OCc 540  BM
 6 D    2903* 7.7   35+ : **  8.7  8.7  0.05" 161.0  OCc 918  B,AkChIW
 7 d  163844  8.8   45+ : AC  9.0 10.9  0.07" 108.9  ????     R,AkChIW
                        : **  9.0  9.6  0.10"  90.0  OCc  20  R,AkChIW
                        : AB  9.0  9.6  0.10" 350.0  ????     R,AkChIW
 8 d  164546  9.6   56+ : AB 10.3 10.6  0.20"  29.5  VBS  34  BR
                        : AB,C 9.7 12.5  0.8"  18.0  B  2897  BR
 9 d   *** Kepler Stars occulted, light curves are desired    BR,AkChW
 9 D    3306#  7.8   66+ : AB  7.8  8.6  8.8"  329.7  STF2913  ,AkChIW
        3306:  B star is X182873
   ***  3306 is a Kepler2 star {ID = 206308169}
 9 D    3322  6.4   68+ : AB  6.64 8.11 0.13" 273.1  A  2695  BCMRS
10 d  146772  9.2   78+ : **  9.8  9.8  0.10"  90.0  OCc 155  CMS
11 d  109113  7.9   85+ : AB  7.9 10.3  9.9"  214.0  STF  23  ,Ak
11 d X   316  9.4   85+ : AB 10.1 10.2  0.40"  67.0  TDS1388  ,AkChW
11 d      67  8.8   87+ : **  9.2  9.2  0.10"  90.0  OCc1142  M
12 d   *** Kepler Stars occulted, light curves are desired    BCMRS,AkChIW
12 d  109888  9.3   94+ : **  9.4  9.4  0.10"  90.0  OCc  74  BCMR
      109888:  B star is X182873  
   *** 109888 is a Kepler2 star {ID = 220480623}
12 d  109901  8.7   94+ : **  9.6  9.6  0.10"  90.0  OCc  75  BCMR
   *** 109901 is Kepler2 star {ID = 220484407}
13 d     334  8.5   98+ : **  9.0  9.6  0.10" 352.0  OCc 574  BCRS,Ak
13 D     352* 7.1   98+ : AB  7.2 10.0  0.67"  23.9  CHR 199  R
13 D     354* 5.5   98+ : **  6.3  6.3  0.05"  46.0  OCc 984  BCMRS,AkChIW
13 d   92953  8.3   98+ : **  9.3  9.3  0.10"  87.0  OCc 981  BR
13 d   92964  8.6   99+ : **  9.5  9.5  0.10"  27.0  OCc 982  BCMRS

15 r     636# 7.0   99- : AB  7.26 8.62 0.59"   8.6  STT  79  R
15 R     648* 3.8s  98- : Aab 3.9  9.5  0.70"   8.9  CHR 262  ,ChIW
15 R     653* 4.8   98- : **  5.6  5.6  0.04"  53.0  OCc 952  CM,AkChIW
                        : AC  4.4  9.6 10.8"   83.0  DRS  37     CM
15 r   *** Kepler Stars occulted, light curves are desired    BCMS,AkChIW
15 r   93914  7.8   98- : AB  6.4  9.1  1.3"  242.3  PAT   6  BR
15 R   93913  7.0   98- : **  7.6 10.6  0.18" 108.8  OCc 615  BCMRS
15 r   93958  7.8   98- : **  9.0  9.0  0.50" 279.0  OCc 532  BCMRS
15 R   93962  7.0   98- : **  7.0       0.01" 210.9  OCc1235  BCMRS,AkChIW
15 r   93963  6.9   98- : **Aa 7.7 7.7  0.03" 337.0  OCc1036  ,AkChIW
15 r   93967# 7.8   98- : AB  9.37 8.09 0.06" 233.3  COU 567  BCMRS,AkChIW
15 R     684  6.2   98- : AB  6.97 7.02 3.10" 277.0  STF 559  M
         684,  B star is X 70265, dT = -14sec
16 R   94684  7.2   93- : AB  7.2 10.9  0.80"  69.4  HDS 749  CMS
17 R    1006* 7.1   86- : **  7.7  7.7  0.05" 350.0  OCc1323  BCMRS,AkChW
17 r   95919  8.4   86- : AB  8.5 13.0  5.2"    8.7           BCMRS
17 r   95988  9.2   86- : **  9.3 10.2  0.02" 162.7  OCc 366  CMS
18 r   96962* 8.5   78- : **  9.3  9.3  0.10"  45.0  OCc 326  ,Ak
19 r   *** Kepler Stars occulted, light curves are desired    BR
19 R   98007  7.6   67- : **  7.9  9.0  0.13" 242.2  OCc1390  R
   *** 98007 is a Kepler2 star {ID = 211716813}
20 r   98587  7.8   57- : **  8.1  9.5  0.02" 292.0  OCc1018  BR
21 r   99050  9.1   47- : **  9.4  9.4  0.10" 331.0  OCc 757  ,AkW
22 r  118656  8.7   37- : AB  8.8 10.2  8.3"  164.0  STF1507  ,Ak
23 r  119120  8.9   28- : **  9.7  9.7  0.15" 140.0  OCc1082  ,AkChIW
23 r   *** Kepler Stars occulted, light curves are desired    BCMRS
24 r   *** Kepler Stars occulted, light curves are desired    ,ChW

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

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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