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

********************************************************************************
 d P    Star  Mag    %         Double details        WDS or   Area of
May      No    v    ill      magnitudes sepn    PA°  OCC #    Visibility
 2 r   *** Kepler Stars occulted, light curves are desired    SCM,AkWChI
 2 R     178  6.6    4- : AB  6.5  9.5  1.3"  133.0  STT  27  CM
   ***    178 is in the Kepler2 program {ID = 220292272}

 7 d   *** Kepler Stars occulted, light curves are desired    RBTSC,AkI
 7 d X 71668 11.3    6+ : AB  8.7 11.0  6.9"  204.8  KOH  37  R
 8 d   77614  8.1   12+ : **  9.0  9.0  0.05" 350.0  OCc 322  ,AkW
 8 d X 79200 10.3   12+ : AB 11.0 11.2  0.70"  91.0  TDS3395  ,AkChI
 9 d X 94263  9.9   20+ : AB  9.5 11.3  9.8"  38.0   POU2072  ,AkWChI
 9 d   78851  8.8   21+ : **  9.7  9.7  0.10" 329.0  OCc 819  RBTS,AkWChI
 9 D    1059* 6.9   21+ : **  7.7  7.7  0.10" 230.0  OCc 820  R
10 d   79813  9.5   31+ : AB  9.3  9.3  7.6"  334.0  STF1158  RBTS,Ak
11 d   *** Kepler Stars occulted, light curves are desired    RBTSC,AkWChI
11 d   80524  9.3   42+ : **  8.4  8.4  0.10" 122.0  OCc 743  RBTSCM,AkWCh
11 d X 13497  9.8   41+ : AB  9.8 10.1  9.3"  323.0  TDS6160  ,Ak
   *** X 13497 is in the Kepler2 program {ID = 211980935}
11 D    1329# 6.8   41+ : AB 7.32 7.86  0.17"  65.1  COU 773° ,AkWChI
   ***   1329 is in the Kepler2 program {ID = 211982221}
11 d   98314  8.9   43+ : **  9.7  9.7  0.25"  98.0  OCc1077  R
   ***  98314 is in the Kepler2 program {ID = 211929765}
11 d   80527  8.2   42+ : AB  8.2  9.1  n/a   350.0  SHN 271  SCM
   ***  80527 is in the Kepler2 program {ID = 211996714}
12 d   98828  9.1   53+ : AB  9.6 10.0  0.16"  52.4  CHR 219° BTS,WChI
12 d   98888  8.9   54+ : AB  9.3 10.1  0.70"  48.1  A  2482  BTSCM
13 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
14 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
15 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
16 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
16 d  139392  8.7   92+ : AB  9.17 9.70 0.10"  22.0  HDS1896  CM,I
16 D    1965  6.5   93+ : **  7.3  7.3  0.05" 350.0  OCc1453  RB
18 d    2184  7.3e  99+ : AB  7.0       0.20" 151.7  CHR  44  ,AkWChI
      2184 is double: AB 7.0      0.20" 151.7
18 d   *** Kepler Stars occulted, light curves are desired    R,ChI
18 d    2223* 3.9  100+ : Aab 4.0  4.2  0.10" 191.0  WRH  20  TSCM,AkWChI

19 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
19 r X 41033  9.1   99- : AB 11.0 11.0  0.8"  226.8  HLD 130  B
   *** X 41033 is in the Kepler2 program {ID = 205278648}
20 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
20 r  185323  9.1   96- : AB  9.5  9.9  0.9"    6.7  SEE 326  RBTSCM,Ak
   *** 185323 is in the Kepler2 program {ID = 234151618}
20 r    2518#?8.0   96- : **  7.4  7.6  0.10" 350.0  OCc1098  SC
                        : AB  8.68 8.90 0.11"  37.8  A  2244° S
   ***   2518 is in the Kepler2 program {ID = 226253039}
21 r  186257  8.6   93- : AB  8.8 11.4  0.70" 262.5  RST5100  ,ChI
21 r   *** Kepler Stars occulted, light curves are desired    SC,AkWChI
21 r  186482# 9.1   92- : AB  9.2 10.3  1.5"  164.6  I   631  RBTSCM,AkWChI
21 r X155055  9.7   91- : AB  9.8 11.0  4.8"   77.8  DON 891  R
22 r   *** Kepler Stars occulted, light curves are desired    RBTCM,WChI
22 r X 45390  9.5   86- : AB 10.3 10.4  0.20" 281.9  A  3085  ,ChI
22 r  187806  8.0   85- : AB  8.0 11.7  7.5"  330.0  SEE 371  BTSCM,AkWChI
22 R    2802* 6.4   85- : **  7.2  7.2  0.05" 350.0  OCc1572  ,ChI

23 R    2929  7.1   77- : **  7.9  7.9  0.10"  90.0  OCc1591  RBTSC,Ak
24 r  163941  9.3   69- : AB  9.4 11.6  2.7"  342.0  I   667  ,AkWChI
25 R    3171# 3.7v  60- : AB  4.6  4.6  0.01" 233.7  gam Cap° SC,AkWChI
26 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
26 R  165197! 7.5   49- : **  7.7  9.3  0.06" 246.0  OCc1656  RBTS
26 R  165218  7.8v  48- : AB  8.63 8.78 3.05" 279.2  STF2928  TS
27 R    3425* 4.4   40- : **  5.4  5.4  0.10"  90.0  OCc1639  RTSCM,AkWChI
27 R   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
27 R    3446  7.2   39- : **  7.9  7.9  0.05"  34.0  OCc1091  RBTSCM,I
                        : AB  7.2  7.7  6.9"  146.5  STF3008  RBTSCM,I
         3446: B star is X185486
   ***   3446 is in the Kepler2 program {ID = 246040978}
28 r  128592  9.2   30- : AB  9.3 10.3  1.0"  193.1  STF3063  RBTSC
       128592:  B star is X 54498
29 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
30 r  110087  8.8   13- : AB  9.2 10.2  0.40"   8.4  A  2008  SCM
31 R     368  6.2    7- : AB  6.23 9.85 1.49" 143.4  STTA 27  RB
          368:  B star is X 62362


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

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.
----------------------------------------------------------------------
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 WDS number followed by a ° sign indicates the double has a known orbit.


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

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

[Top of Page][Return to Home Page]