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Lunar Occultations of Close Double and Kepler2 Stars in July 2015 for Australia and NZ


The list shows occultations of possible double stars during July. 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 July 2015 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.

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 number of these is increasing, rather than list them all, the nights on which they are occulted are indicated. Individual Keplers are only shown if they are also a known or possible double. Light curves of occultations of all Kepler stars are desired.
Reporting of these events is still being sorted out, with a system in Occult coming soon. In the meantime please archive any observations of Kepler stars, keeping both the video and the light curve.

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
Jul      No    v    ill      magnitudes sepn    PA?  OCC #    Visibility
 1 d X 43398  7.4   99+ : **  8.8  8.8  0.05" 350.0  OCc1528  R
 1 d  160994# 8.4   99+ : AB  8.8  9.8  0.40" 153.8  A  2256  MS,AkChIW
 1 d  161338  7.0  100+ : **  7.4  9.0  0.9"  315.0  OCc1541  H,I

 2 r    2768* 7.8  100- : **  9.2  9.2  0.10"  90.0  OCc1563  BCMS,AkChIW
 3 r  163440  7.5   96- : AB  7.6 10.5  1.20" 252.7  RST4057  ACHMS
 3 r  163460* 8.5   96- : **  9.4 10.3  0.06" 125.0  OCc 440  AP
 3 R    2968# 6.1   96- : Bab 6.16 9.14 0.48"  61.5  BAR  12  P
 3 R    2969# 3.1   96- : Aab 3.1  4.9  0.09" 210.7  BLA    7 P
 3 R    2975* 7.0   96- : **  7.8  7.8  0.05"  20.0  OCc 476  P
 4 r  164080* 7.1   92- : **  8.1  8.1  0.10" 107.0  OCc 914  ABCHMS,AkChIW
 4 r  164143# 8.4   92- : AB  9.2  9.2  0.31"  47.8  RST4693         BR
 4 r  164213  9.0   91- : **  9.0  9.5  0.03" 302.3  OCc 403  ABCHMPRS,AkChIW
 4 r  164222# 8.9   91- : AB  9.7 10.2  0.17" 251.1  VOU  24  CHMS,AkChIW
 5 r  *** Kepler Stars occulted, light curves are desired     ABCHMPRS,AkW
 5 r  145886  9.6   83- : ** 10.0 10.0  0.10"  88.0  OCc 828  ACHMS,AkChIW
      *** 145886 is a Kepler star, light curve is desired
 5 R    3247*?7.0   83- : **  7.8  7.8  0.10"  90.0  OCc1617  ABCHMPRS
 5 r  145921  9.1   83- : **  9.7  9.7  0.10"  97.0  OCc 822  ABCHMPRS
 5 R  145938  7.2   83- : AB  7.2 10.3  0.9"  173.7  BU  475  ABPR
 5 r  145984  8.9   82- : AB 9.04 10.87 0.43" 125.8  HDS3158  A
      *** 145984 is a Kepler star, light curve is desired
 6 r  146432  8.2   74- : AB  8.3  9.5  8.6"  280.0  STF2964  ABCHMRS,AkChW
      146432:  B star is X184654
 6 R    3411# 7.2   72- : AB  7.41 9.2  0.39" 104.7  BU  714  P
 8 r  109521  9.2   51- : AB  9.3 10.6  8.9"  339.0  STF  71  BCMRS,Ak
 8 r  109616  9.0   50- : AB 10.30 9.32 0.10" 283.3  A  2003  AP
 8 r X  1301 10.2   50- : AB 10.3 10.5  4.9"  242.9  STF  78  R
 8 r  109620  8.6   49- : **  9.1  9.1  0.20"  82.0  OCc 544  P
 9 r  110097  8.6   41- : **  9.3  9.3  0.10"  90.0  OCc  76  ,AkW
 9 r  110183  9.8   39- : **  9.7  9.3  0.30" 270.0  OCc1170  ABCHMPRS,W
11 r  *** Kepler Stars occulted, light curves are desired     ABCHMRS,AkI
11 r X  4712  9.30  19- : AB 10.1 10.1  0.10"  69.2  HU 1064  ,AkChIW
      *** X  4712 is a Kepler star, light curve is desired
12 r   94064  8.7   11- : **  8.7 10.6  0.03" 128.0  OCc1241  ABCHMS
12 r   94120  8.5   10- : AB  8.7       0.08" 280.7  PAT  17  P
13 r X 75348 10.2    6- : AB 10.4 10.4  4.3"  333.8  J   246  ,AkChW
13 R   94678* 7.6    5- : **  7.7  8.7  0.8"   96.0  OCc1266  BRS,Ak
       94678:  graze at Auckland
13 R   94690* 9.2    5- : AB 13.2 14.1  3.2"   91.0  COU 469  BR

19 d    1505* 8.8   10+ : **  9.7  9.7  0.10"  90.0  OCc   7  ABCHMRS
19 d  118208# 9.6   10+ : AB 10.4 10.6  0.30" 392.8  A  2765  ABCHMRS
21 d  *** Kepler Stars occulted, light curves are desired     ABCHMRS,ChIW
23 d X 36059 10.3   42+ : AB 11.0 11.1  0.50" 101.0  TDS8781  C
23 d  139281  8.4   42+ : AB  8.6 10.4  0.3"  126.0  HDS1867  ABCMRS,AkChW
23 d  139295*10.0   42+ : **  9.9  9.9  0.05"  90.0  OCc   5  ABCMRS
24 D    2028* 6.5   52+ : AB  6.5       0.30"  31.0  CHR  40  BR
24 d X 37425 10.1   52+ : AB 10.7 11.2  0.15" 228.9  RST3860  CHMS,I
24 d  139781  8.8   53+ : AB  9.1 10.64 0.45" 145.3  RST3866  ACHMPS,ChI
25 d  158900  8.4   62+ : AB  8.4 11.68 2.37"   9.7  HU  142  R
26 d X 39928  8.3   71+ : AB  8.6 10.0  3.0"  322.3  STF3095  ,AkChIW
27 d  *** Kepler Stars occulted, light curves are desired     ,AkIW
27 d X 41431  8.9   81+ : AB  9.7  9.8  3.3"   83.7  SKI  10  ABCHMPRS,Ak
     X 41431:  B star is X137353
28 d  160678  7.6   88+ : Aab 8.2  8.8  0.10"  96.0  YSC 158  H,AkChIW
                        : AB  7.7 10.1  0.83"  94.1  HDS2485  H,AkChIW
28 d  160686  9.3   88+ : AB  9.5 11.3  0.30" 139.0  HDS2486  BCHMS,AkChIW
28 d X 42732  9.8   88+ : AB  9.8 10.5  2.0"  271.1  HLD 138  ABCHMS,AkChIW
28 d  160757  9.4   88+ : ** 10.1 10.1  0.10"  90.0  OCc 535  ACHMS,AkChIW
28 D    2555  7.5   89+ : BA 10.3  7.6  1.0"  130.8  HU 186
   ABCHMPRS
        2555:  A star shown as X144366 mag 7.6                
29 d X 44881#?8.6   95+ : AB  8.7  9.8  1.3"  165.5  HU  255  ACHMPS
29 d X 45048# 8.6   96+ : AB  8.8 10.8  3.8"    6.2  HJ 2045  P
30 d  162748  7.7   98+ : **  8.2  8.2  0.05"  90.0  OCc   9  H,AkChIW
30 d X 54074  8.2   98+ : AB  9.0  9.1  4.1"  149.9  HJ 2880  C,AkChIW
     X 54074:  B star is X169206
30 d    2856  7.1   98+ : **  6.8  8.5  0.20" 347.0  OCc1579  BCHS,AkChIW

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

Visibility codes:
Australia: A Adelaide, 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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