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


The list shows occultations of possible double stars during August. 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
Aug      No    v    ill      magnitudes sepn    PA?  OCC #    Visibility

 1 r  164563  7.6   98- : **  7.6       0.04" 132.0  OCc1708  ,I
 1 r X 50587  8.9   98- : AB  9.2 11.0  2.0"   88.4  I   302  R
 1 r  164606  9.4   98- : **  9.8  9.8  0.10"  94.0  OCc 948  ACHM,AkChIW
 1 r    3183  8.8   98- : **  9.5  9.5  0.10"  90.0  OCc1611  ABPRS
 2 r  *** Kepler Stars occulted, light curves are desired     ABCHMRS,AkChIW
 2 R    3308#?6.2   94- : AB  6.3  8.6  0.05"  83.4  CHR 111  ,AkChIW
 2 r    3348  8.2   92- : AB  8.3 10.7  0.40"   1.0  HDS3237  ,ChI
 3 r    3485  8.9   86- : AB  8.9 11.7  0.69" 240.8  YR   18  H,AkChIW
 4 r  109331  9.4   76- : **  9.8  9.8  0.10"  90.0  OCc 127  ABCHMS,AkChIW
 4 R  109355  7.7   76- : **  9.1  9.1  0.10"  90.0  OCc1143  ABPR
 4 R      90  7.6   75- : AB 7.86  9.7  2.05" 209.7  STT  18  ABCHMPRS
          90:  B star is X 56236 (about 5 sec earlier)
 5 r  109908  8.0   66- : Bab 8.1 11.1  0.57"  36.1  S   398  ,AkChIW
 5 r X  2098  9.6   66- : AB  9.7 10.5  6.5"  335.9  PLQ  17  ,AkW
 5 R     226  6.5   65- : AB  6.5 10.6  4.0"   77.1  STT  31  ABCHMRS,AkChIW
         226:  B star about 9 sec later 
 5 r  110038  8.5   64- : **  9.0  9.0  0.10"  90.0  OCc 542  PR
 5 R     247  6.3   64- : **  7.1  7.1  0.10" 111.0  OCc1030  ACHMP
 5 r  110097  8.6   63- : **  9.3  9.3  0.10"  90.0  OCc  76  P
 6 r   92923  8.5   55- : AB  9.48 9.54 2.92" 251.7  STF 261  ,AkChW
 6 R     384  5.6   53- : AB  5.7  5.8  0.04"   9.1  MCA   7  ACMP
 7 r  *** Kepler Stars occulted, light curves are desired     ACHMP
 7 r     515  8.6   41- : AB  8.7 11.8  2.77"  48.7  HI 1061  HMP
      *** Kepler2 star {ID = 210508219} light curves desired
 8 r  *** Kepler Stars occulted, light curves are desired     ABCHMRS,AkChIW
 8 r   93860  8.5   33- :*Aab 8.9 11.0  0.06" 244.0  OCc 938  ,AkChIW
 8 R   93913  7.0   32- : **  7.6 10.6  0.18" 108.8  OCc 615  R
 8 R     648  3.8   32- : Aac 3.8 12.9        350.0  OCc 255  ACHMS,AkChIW
                        : Aab 3.8       0.68"   8.2  CHR 262  ACHMS,AkChIW
 8 R     653  4.8   32- : **  5.6  5.6  0.04"  53.0  OCc 952  ABHMRS,AkChIW
 8 R     658  4.3   31- : AB  4.26 7.85 1.82" 340.3  KUI  17  ,I
         658:  B star is X 69899
 8 r   93958  7.8   31- : **  9.0  9.0  0.50" 279.0  OCc 532  P
 8 R   93962  7.0   31- : **  7.0       0.01" 224.6  OCc1235  ABMP
 8 r   93964* 9.0   31- : **  9.9  9.9  0.40" 108.0  OCc 483  A
 8 R   93963* 6.9   31- : *Aa 7.7  7.7  0.03" 337.0  OCc1036  AB
 8 R   93967# 7.8   31- : AB  9.37 8.09 0.07" 227.7           P
 8 r X 70180  9.5   30- : AB  9.5       0.01" 248.0  VVO 394  P
 9 r     785* 9.2   23- : **  9.2 10.1  0.04" 281.1  OCc 486  ,AkChW
 9 r X 73437# 8.3   23- : Bab 8.5 11.0  0.70" 161.6  COU2580  ,AkChW
                        : BA  8.3  7.7  2.6"  344.9  STF 670  ,AkChW
 9 R     787# 7.1   23- : AB  7.7  8.3  2.6"  164.9  STF 670  ,AkChW
         787:  B star is X 73437 (above)
 9 r X 73471 10.1   23- : AB 10.1 10.4  1.9"  231.4  COU  38  ,AkChIW
 9 r X 73658  9.4   22- : AB  9.5 11.5  6.1"  308.8  COU  39  CS,AkChIW
 9 r X 73876 10.2   22- : AB 10.8 10.9  0.50" 116.0  TDS3156  ABCHMS
 9 R     800  7.9   22- : Aab 8.22 9.28 0.25"  23.2  HDS 705  CHMS
 9 r X 74061 10.8   22- : AB  9.7 10.2  6.2"  334.4  COU  40  ACHMR
 9 r   94521  9.2   21- : AB  9.2 13.9  3.4"   99.9  A  2431  AHM
 9 r   94563  8.8   21- : AB  8.8 10.4  1.1"  291.5  A  2432  P
10 r  *** Kepler Stars occulted, light curves are desired     ABCPRS,AkChIW
10 R   95390  7.4   14- : **  8.3  8.3  0.05"  13.0  OCc 927  ,AkChIW
10 r X 84930  9.5   14- : AB  9.6 11.2  2.7"  134.9  J    19  ,AkChIW   
      *** Kepler2 star {ID = 2020612048} light curves desired
10 R     947  5.2   14- : AB  5.2 11.2  7.1"  185.4  HJ 2302  ,AkChIW
10 r X 85235  9.5   14- : AB  9.5 12.1  7.1"  193.8  CXT   2  S,I
       *** Kepler2 star {ID = 202062458} light curves desired
   X 85235 is multiple: AB 9.5 12.1 7.1" 193.8
10 R   95475  7.2   14- : AB  7.3 11.6  5.1"  134.6  BU  894  BCHMS
10 r   95557  9.3   13- : AB  9.9 10.2  0.34"  94.7  A  2516  P
       *** Kepler2 star {ID = 202059348} light curves desired
10 r X 86665 10.5   13- : AB 10.8 11.3  1.3"  254.0  TDS3765  P
11 r X 97966 11.0    8- : AB 11.0 17.0  9.2"  345.0  SKF 272  ,Ak
11 r X 98136 10.7    8- : AB 10.9 11.0  4.1"  117.3  BRT2369  ,AkChW
11 r   96573* 8.2    8- : **  9.4  9.4  0.10"  90.0  OCc1344  BS
11 r X 98715 10.1    8- : AB 10.5 11.4  0.9"  107.0  TDS4549  BCRS
11 r   96647# 8.3    7- : AB  8.44 9.9  1.00" 103.8  A  2525  A

16 d    1573  7.1    2+ : **  7.8  7.8  0.05" 350.0  OCc1420  ,I
17 d  *** Kepler Stars occulted, light curves are desired     ABCHMPRS,AkChIW
18 d X 18438  9.7   13+ : AB  9.7 10.2  1.3"  134.5  HLD  13  P
     X 18438:  B star is X123850D
19 d    1874* 7.7   18+ : AB  5.7  7.0        158.8  OCc1444  BC,Ak
19 d X 35759 10.4   19+ : AB 11.4 11.7  2.8"  353.3  A    10  BCHMS,AkChIW
19 D    1891  4.4   19+ : Aab 4.49 6.8  0.4"  348.9  MCA  38  ACHMPRS
                        : AB  4.4  9.4  6.4"  342.0  STF1724  ACHMPRS
        1891:  B star is X125676, (about 12 sec earlier)  
20 d  *** Kepler Stars occulted, light curves are desired     ABCHMPRS,AkChIW
20 d  139606  9.6   27+ : AB  9.8 12.1  1.0"  118.2  RST3853  ABCHMRS,Ak
21 d  158710  9.9   36+ : **  9.9  9.9  0.10"  90.0  OCc  10  R
22 d X 39530  9.9   45+ : AB  9.9 11.6  0.9"  248.7  HU  310  R
22 D    2223  3.9   47+ : Aab 4.0  4.2  0.1"  228.6  WRH  20  ABCMPRS
22 d X133538  8.9   48+ : AB  9.6  9.9  5.5"  270.0  HWE  37  P
23 d  *** Kepler Stars occulted, light curves are desired     BCHMRS,AkChIW
23 D  159822  7.8   55+ : **  8.6  8.6  0.10"  90.0  OCc  18  ,W
23 d  159852  9.1   55+ : AB  9.2 10.6  1.2"  320.5  HU  311    BS,AkW
23 D    2365  7.3   57+ : AB  7.60 8.78 0.28"  56.3  RST3950  H,ChIW
24 d  160421# 8.6   66+ : AB  8.9 10.0  1.00"  53.6  STN  33  BRS
      160421:  B star is X141119
24 D    2495  6.0   67+ : AB  6.34 7.56 2.3"  263.3  BU  126  ABCHMPR,Ak
        2495:  B star is X141441
24 d  160486  9.4   67+ : AB  9.6 12.3  5.2"  327.4  ARA 249  R
24 d  160513  8.6   67+ : **  9.2  9.2  0.10"  90.0  OCc  14  PR
24 d  160517  8.6   67+ : **  9.6 10.0  1.0"  320.0  OCc1501  ACHMS,I
24 d  160580  8.7   68+ : AB  8.8  9.4  8.4"  194.1  HJ 2806  P
25 d  161107  9.3   75+ : **  9.4 11.0  1.0"   10.0  OCc1529  ,I
25 d  161282  8.9   77+ : Aab 9.5 10.1  0.4"  130.0  TDT 781  ABCHMPRS,AkW
                        : AB  9.1 12.5 10.4"  348.8  ARA 275  ABCHMPRS,AkW
25 D  161338  7.0   77+ : **  7.4  9.0  0.9"  315.0  OCc1541  ABCHMPRS,AkChW
25 d  161402  9.3   77+ : AB 10.7 10.8  7.4"  342.0  J  2209  AH
26 d  162251#?8.1   85+ : **  9.2  9.2  0.10"  90.0  OCc1570  CHMS,AkChIW
26 d  162460  9.2   86+ : AB  9.3 11.3  0.30"  50.9  RST3221  ABCMPR
26 d  162558  8.8   86+ : AB  8.9 12.6  4.4"  179.7  HU 2666  AHMP
27 d  163356  8.7   92+ : AB  9.4  9.4  8.8"  343.8  KUI  96  R
27 d  163371  8.6   93+ : **  9.5 10.0  0.36" 252.0  OCc 407  R
27 d  163440  7.5   93+ : AB  7.6 10.4  1.20" 252.7  RST4057  CHMS,AkChIW
27 d  163460* 8.5   93+ : **  9.4 10.3  0.06" 125.0  OCc 440  ABPRS
27 D    2968# 6.1   93+ : Bab 6.2  9.1  0.48"  61.4  BAR  12  PR
27 D    2969# 3.1   93+ : Aab 3.1  4.9  0.10" 210.2  BKA   7  PR
27 D    2975* 7.0   93+ : **  7.8  7.8  0.05"  20.0  OCc 476  ABCHMPRS,I
28 d  164143# 8.4   97+ : AB  9.20 9.20 0.31"  47.8  RST4693  B
28 d  164213  9.0   97+ : **  9.0  9.5  0.03" 302.3  OCc 403  ACMS,AkChIW
28 d  164222# 8.9   98+ : AB  9.7 10.2  0.17" 250.9  VOU  24  ,AkChIW
                        : AC  9.7 12.9  2.6"  232.0  RST4077  ,AkChIW
28 d  164371  9.1   98+ : **  6.6  8.8  0.03"  92.0  OCc 945  AP
29 d  *** Kepler Stars occulted, light curves are desired     ,ChIW
29 d    3247* 7.0  100+ : **  7.8  7.8  0.10"  90.0  OCc1617  HM,ChIW
29 d  145938  7.2  100+ : AB  7.2 10.3  0.9"  173.6  BU  475  HM,AkChIW
29 d    3285* 5.9  100+ : **  6.9  6.9  0.10"  90.0  OCc   6  P
29 r    3285* 5.9  100+ : **  6.9  6.9  0.10"  90.0  OCc   6  P

30 r    3402  8.5   99- : AB  8.7 10.9  1.40" 144.6  A   3111 BR
30 R    3416  5.6   99- : **  6.4  6.4  0.05" 350.0  OCc1638  PR
30 r  146623  8.9   99- : AB  9.6  9.6  0.10"  41.0  YSC 167  ABP
31 r      16  7.5   95- : AB  7.67 9.31 0.30" 125.4  HDS  18  R
31 r  109039  7.3   95- : **  8.6  8.6  0.20"  90.0  OCc1137  ABCMRS,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 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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