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 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
Nov      No    v    ill      magnitudes sepn    PA°  OCC #    Visibility
 1 D  186363  9.0   20+ : AB  9.58 9.92 0.16" 110.4  RST3157° ,AkW
 1 d X150976 10.1   20+ : AB 10.7 10.8  0.51"  36.0  DON 883  ,AkW
 1 d  186384  9.1   20+ : AB  9.7 10.0  0.35" 135.1  RST3158  ,WCh
 1 d X155055  9.7   22+ : AB  9.8 11.0  4.8"   77.8  DON 891  M
 2 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
 3 D    2929# 7.1   40+ : **  7.9  7.9  0.10"  90.0  OCc1591  ,AkWChI
 4 d  164014  9.6   50+ : AB  9.7 11.8  5.7"  301.3  DON 996  RBT
 6 d   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
 6 D  165197  7.5   69+ : **  7.7  9.3  0.06" 246.0  OCc1656  RBTSCM,Ak
 6 d  165218  7.8   69+ : AB  8.63 8.78 3.04" 279.1  STF3928  RBTSCM
       165218:  B star is X183315
 7 D   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWChI
 7 D    3425* 4.4   77+ : **  5.4  5.4  0.10"  90.0  OCc1639  BC,AkWChI
 7 D    3446  7.2   78+ : **  7.9  7.9  0.05"  34.0  OCc1091  RBTSCM,AkWChI
                        : AB  7.2  7.7  6.9"  146.2  STF3008  RBTSCM,AkWChI
         3446:  B star is X18548
 9 d   *** Kepler Stars occulted, light curves are desired    RBTSCM
11 D     352* 7.1   99+ : AB  7.2 10.0  0.7"    3.0  CHR 199  RBTSCM,AkWChI
11 D     354* 5.5   99+ : **  6.3  6.3  0.05"  46.0  OCc 984  ,AkWChI
11 d   92953  8.3   99+ : **  9.3  9.3  0.10"  87.0  OCc 981  RBTSCM,AkWChI
                         BaBb 9.3  9.3  0.10" 350.0           RBTSCM,AkWChI

13 r   93676  7.9   99- : AB  7.9  9.9  4.0"  216.8  BU   85  ,AkW
   *** 93676 is in the Kepler2 program {ID = 210647396}
14 r   *** Kepler Stars occulted, light curves are desired    ,AkW
14 R     752* 4.6   95- : **  5.4  5.4  0.10"   0.0  OCc 230  RBTSCM
14 r   76940  8.0   95- : AB  8.69 8.86 0.20" 302.6  COU 154  RCM
   ***  76940 is in the Kepler2 program {ID = 247430338}
15 R     887* 7.0   91- : **  7.1  9.1  0.10" 103.0  OCc 841  ,AkWChI
15 r X 33749  9.5   90- : AB  9.5 10.6  9.2"  114.9  HJ  373  R
15 r   77767# 8.9   90- : AB  9.3 10.1  0.22" 253.9  OCc1336  RBTSCM
16 r   78786  8.5   83- : AB  8.88 9.67 0.16" 197.3  COU 768° ,AkWCh
16 r   78843  8.9   83- : Aab 8.9 11.0  0.10" 350.0  OCc9129  RBTSC,AkWChI
16 r   *** Kepler Stars occulted, light curves are desired    ,ChI
17 r    1178  6.3   75- : AB  6.85 7.30 0.26"  24.6  WRH  15° ,AkWCh
18 r    1325  8.6   64- : AB  9.49 9.01 0.40" 335.8  COU 588  ,AkWCh
   ***   1325 is in the Kepler2 program {ID = 212048998}
18 r   *** Kepler Stars occulted, light curves are desired    RBTSCM,AkWCh
19 r   98824  9.4   52- : **  9.1 10.3  0.50"  73.0  OCc 662  RBTS
20 r   *** Kepler Stars occulted, light curves are desired    RBT,AkWChI
20 r   99334  8.5   40- : **  9.0  9.0  0.10"  90.0  OCc  50  RBTM
21 R  119037  8.2   29- : AB  8.4 11.4  0.38" 187.5  A  2778  RBTSCM
22 r   *** Kepler Stars occulted, light curves are desired    RBT
23 r   *** Kepler Stars occulted, light curves are desired    RB

29 d  187198  9.5    8+ : AB  9.7  9.7  0.09" 212.0  RST5453  ,AkW
29 d  187278  9.5    9+ : AB  9.9 10.4  0.65" 342.9  DON 923  RBTSC,WChI
   *** 187278 is in the Kepler2 program {ID = 216207217}
29 d   *** Kepler Stars occulted, light curves are desired    BTSC,AkWChI
30 d  188463  9.1   15+ : AB  9.4 11.0  0.10" 181.0  HDS2793  RB,Ak
30 d  188569* 8.0   16+ : AB  8.63 9.31 1.38" 334.8  STN  49  BSCM,I
       188569:  B star is X171059

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

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]