The list shows occultations of possible double stars during March. 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 March 2019 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 brian.loader@slingshot.co.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.

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 d P    Star  Mag    %         Double details        WDS or   Area of
Mar      No    v    ill      magnitudes sepn    PA°  OCC #    Visibility
 1 R    2797*?2.9   21- : AB  3.6  3.6  0.10" 194.4  FIN 911  ,AkWChI
                        : AC  3.0  6.0  0.30" 136.0  FIN 911  ,AkWChI
 1 r X164933  9.2   21- : AB  9.2 12.1 15.2"  146.2  ARA1564  ,Ak
   *** X164933 is in the Kepler2 program {ID = 217020374}
 1 r X 45706  9.9   20- : AB 10.4 10.7  0.50"  96.0  TDT1330  RBTSCM,Ak
   *** X 45706 is in the Kepler2 program {ID = 217163685}
 1 r   *** Kepler Stars occulted, light curves are desired    SCM,AkWChI
 2 r X 47692 10.2   12- : AB 10.2 12.2  5.1"   31.2  SEE 409  RBTSCM
 2 R  188984  8.9   12- : AB  8.1 12.0  0.48"  64.6  BEU  21  RB

 9 d   *** Kepler Stars occulted, light curves are desired    RBTM,Ak
 9 d  109709  9.5    6+ : AB  9.6 12.8  0.9"  310.9  A  2312  ,Ak
   *** 109709 is in the Kepler2 program {ID = 220320838}
10 d     298* 7.1   13+ : **  8.0  8.0  0.10"  90.0  OCc1172  SCM
11 d   93130  9.6   20+ : Aab10.2 10.6  0.10" 350.0  OCc9078  RBTSCM
11 d   93131  9.7   20+ : Bab 9.5  9.8  0.20" 162.6  CHR 201  BTSCM
        93131 was OCc 651
12 d   *** Kepler Stars occulted, light curves are desired    ,AkWChI
12 D     523  6.4   28+ : **  7.3  7.3  0.10"  90.0  OCc1208  RB
   ***    523 is in the Kepler2 program {ID = 210501067}
13 D     668* 3.5   38+ : Aab 3.6  6.0  0.20" 108.0  WSI  53  ,ChI
14 d   77176  9.6   49+ : ** 10.3 10.3  0.05" 108.0  OCc1039  ,Ak
14 d   77182  9.0   49+ : **  9.6  9.6  0.05" 350.0  OCc1260  BTS,AkWChI
14 d X  6975  9.9   49+ : ** 10.7 10.7  0.05"  60.0  OCc1040  RBTS
14 d   77287* 8.3   51+ : AB  8.4 11.1  3.3"  328.8  A  2107  RB
14 d   77293  7.6   51+ : AB  7.6 10.8  9.4"  267.0  MZA  17  M
15 D   78352# 7.2   60+ : AB 7.33  9.38 0.6"  262.3  STT 139° ,AkWChI
15 d   78507  7.4   61+ : **  8.5  9.1  0.02" 254.2  OCc 310  RBT
17 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
17 d   80249  8.7   81+ : AB  9.18 9.77 0.60" 134.9  HDS1223  RBTSCM,AkWChI
   ***  80249 is in the Kepler2 program {ID = 212008170}
17 d   80317  8.3   82+ : **  8.3 10.6  0.04"  98.7  OCc 637  RBTSCM
   ***  80317 is in the Kepler2 program {ID = 211984243}
17 d   80327  7.8   82+ : AB  7.9  9.6  0.63" 138.1  COU  47  RBTSCM
   ***  80327 is in the Kepler2 program {ID = 211989558}
17 d   80331  9.0   82+ : Cab 9.2       0.30"  22.0  PAT  44  RBTSCM
   ***  80331 is in the Kepler2 program {ID = 211986176}
17 D    1296  6.6   82+ : Bab 6.6       0.40" 182.3  CHR  28  RBTSCM
   ***   1296 is in the Kepler2 program {ID = 211982469}
17 d   80340  7.9   83+ : **  8.8  8.8  0.05" 111.0  OCc1074  RBTSC
   ***  80340 is in the Kepler2 program {ID = 211973658}
17 d   98020  7.6   83+ : **  9.1  9.1  0.05" 350.0  OCc1392  RB
   ***  98020 is in the Kepler2 program {ID = 211964025}
17 D    1302  6.8   83+ : **  7.5  7.5  0.05" 350.0  OCc1393  RBT
   ***   1302 is in the Kepler2 program {ID = 211966197}
17 D    1298  6.4   83+ : AE  6.5 12.5  15.1" 153.8  SMR  30  R
   ***   1298 is in the Kepler2 program {ID = 211962912}
17 d    1305  6.9   83+ : **  7.2  9.1  0.02" 102.1  OCc 638  RBTSCM
   ***   1305 is in the Kepler2 program {ID = 211976270}
18 d   98744  8.9   91+ : **  9.6  9.6  0.25" 113.0  OCc1123  R
19 d   *** Kepler Stars occulted, light curves are desired    RBTSCM
20 d  118922  8.5   99+ : AB  8.6 12.4  0.40" 215.0  HDS1639  RB,Ak

21 r   *** Kepler Stars occulted, light curves are desired    SCM,WChI
22 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
24 r    2184  7.3   84- : AB  7.0       0.20" 151.8  CHR  44  RBTS,AkWCh
24 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
25 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
26 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
26 R    2448  6.3   66- : **  7.2  7.2  0.10" 270.0  OCc  40  ,AkWChI
26 r X 41932  9.6   65- : AB 11.3 11.4  1.3"   24.6  HU 1175  ,ChI
   *** X 41932 is in the Kepler2 program {ID = 230792408}
26 r  160296  8.1   65- : AB  8.8  8.8  0.70" 181.0  ARG  78  BTSCM,AkWChI
   *** 160296 is in the Kepler2 program {ID = 230779691}
26 R    2463# 6.9   65- : AB  7.18 8.71 0.10" 120.9  MCA  46  RBTSCM,AkWChI
   ***   2463 is in the Kepler2 program {ID = 230756009}
26 r X140352 10.1   64- : AB 11.3 11.4  1.3"   24.6  B   334  ,AkWChI
   *** X140352 is in the Kepler2 program {ID = 230740586}
27 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
27 r X 43203  8.4   55- : AB  8.6  9.7  2.2"  266.3  HLD 140  BTSCM,AkWChI
      X 43203:  B star is X147791
27 r  186257  8.6   54- : AB  8.8 11.4  0.70" 262.5  RST5100  RBTSCM,AkWChI
27 r X150313#10.1   54- : AB 10.9 11.0  0.59"  40.8  RST5101  RBTSCM
28 r X162472 10.1   45- : AB 10.2 12.7  5.9"  261.0  B  2870  ,AkW
   *** X162472 is in the Kepler2 program {ID = 216776305}
28 r   *** Kepler Stars occulted, light curves are desired    RBTSC,AkWCh
28 r  187538#?8.6   44- : Aab 8.7 10.9  0.30" 150.0  HDS2693  M,I
   *** 187538 is in the Kepler2 program {ID = 217066606}
28 R    2778# 7.3   43- : AB  7.87 8.06 1.25" 182.5  H H 126° M
         2778:  B star is X163643
29 R    2892* 6.8   35- : AB  7.0  8.9  0.20"  18.0  HDS2815  RBTSCM,AkWChI
30 r X176058 10.1   26- : CD 10.1 11.0  4.5"  188.0  HLD  40  RB
30 r X 48905  9.6   26- : AB  9.6 10.3  5.2"  357.0  HLD  40  RBT
      X 48905:  B star is X176075
30 r X 48909 10.1   26- : AB 10.2 10.5  1.8"   84.8  HU  270  TSCM,I
      X 48905:  B star is X176079
31 r  164504  8.8   18- : AB  8.9 12.3  8.9"  147.9  FAL  72  CM


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

NZ (following a ,) Ak Auckland, W Wellington, Ch Christchurch, I Invercargill.

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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 brian.loader@slingshot.co.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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