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Lunar Occultations of Close Double Stars in April 2014 for Australia and NZ


The list shows possible double stars, with separations less than 2", predicted to be occulted by the Moon during April 2014 and visible from parts of Australia or New Zealand. 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.

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.

The list below is generated by OCCULT for a 25cm telescope. Some of the events may be beyond the reach of smaller telescopes.

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.

  
 d P    Star  Mag    %          Double details        WDS or   Area of
Apr       No    v   ill      magnitudes sepn    PA?   OCC #    Visibility
 5 d   94595  9.7   31+ : **  9.7  9.8  0.9"    64.0  OCc 614  C
 5 D   94684  7.2   32+ : AB 7.23 10.88 0.80"   69.3  HDS 749  AAsMP
 6 d X  9020  9.1   41+ : **  9.2  9.2  0.06"  145.0  OCc1314  R
 7 d   96573* 8.2   49+ : **  9.4  9.4  0.10"   90.0  OCc1344  ,ChIW
 7 d   96647# 8.3   50+ : AB  8.44 9.85 1.01"  103.7  A 2525   CHMS,ChIW
       96647:  B star is X 99289
 7 d   96727  9.0   51+ : **  9.8  9.8  0.10"   90.0  OCc   3  AAsBCHMPRS
 7 d   96785  9.4   51+ : **  9.9  9.9  0.10"   54.0  OCc1355  P
 8 d   97457  8.7   59+ : **  9.3  9.3  0.05"  350.0  OCc1377  ,AkChW
 8 d    1234* 6.2   61+ : **  6.9  6.9  0.10"  333.0  OCc 417  As
 9 D    1341* 4.3   70+ : **  5.1  5.1  0.050"   0.0  OCc 333  AsR
10 d    1414  8.7   77+ : **  9.0  9.5  0.40"  158.0  OCc 568  ,AkChW
10 D    1429* 6.8   78+ : **  7.6  7.6  0.05"   80.0  OCc 306  BR,Ak
10 d  117869#?8.6   78+ : **  9.5  9.5  0.10"  270.0  OCc 545  AsBR
11 D  118241# 7.4   84+ : AB  7.99 8.30 0.90"  312.5  STF1426  ,AkChIW
      118241:  B star is X117966
11 d  118253# 9.0   84+ : **  9.1  9.9  0.013" 174.7  OCc 569  ,AkChIW
13 d  138555  8.0   96+ : AB  8.7  8.57 1.29"   13.8, STF1593  AAsBCHMPRS,AkChIW  
      138555:  B star is X122844 

16 r X 38149  8.9   98- : AB  9.5 10.1  1.3"   195.1  HU  140  ,ChIW
16 R    2114  5.3   98- : AB  5.61 6.62 1.93"    3.0  BU  106  HM
        2114:  B STAR IS x130028 
17 r  159353  8.7   94- : AB  8.8 11.9  1.2"   294.1  RST3923  AAsBCHMRS,AkChIW
17 r  159489  7.8   93- : AB  8.08 9.33 0.10"  336.0  HDS2221  AP
18 R    2396  6.7   86- : **  7.1  7.5  0.04"  141.0  OCc  36  ACHMPS
20 r  161468* 7.9   70- : **  9.0  9.5  0.05"  350.0  OCc1547  ,AkChW
21 R    2856  7.1   57- : **  6.8  8.5  0.20"  347.0  OCc1579  AsBR
21 r X 46524  9.7   56- : AB  9.8       0.70"  185.0  ARU  16  ,ChI
21 R    2883* 5.5   55- : A   5.5       0.012"  32.6  BUP 197  AP
21 r  162960# 8.9   55- : AB  9.0 11.2  0.20"   47.0  HDS2809  P
22 r  163668# 8.3   46- : AB  9.14 9.22 1.22"  172.6  HO  133  R
22 r X176083  9.4   43- : AB  9.4 11.1  1.1"   119.0  TDS1095  P
23 r  145454  9.9   34- : AB 10.4 10.8  0.50"   72.0  TDT3008  HM,AkChIW
23 R    3154* 7.4   34- : **  8.2  8.2  0.10"   90.0  OCc1604  R
23 r  145567  8.7   32- : **  9.3  9.3  0.03"   95.0  OCc 347  As
24 R    3287  5.8   24- : AB  6.4  6.6  0.46"   35.1  BU  172  ,ChIW
24 R    3290  7.3   23- : AB  7.3       0.60"  219.0  ARU  23  BCHMRS,AkW

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

Visibility codes:
Australia: A Adelaide, As Alice Springs, B Brisbane, C Canberra, H Hobart, M Melbourne, P Perth, 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 new version of 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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