Result of Campaign for 1st mag stars' Occultations

1998 Oct 9 : Alebaran's Occ

Solid (good accuraly) and broken (poor accuracy) lines are Watts' profile of lunar limb. Each observed point is very important because the video observations have extremely high accuracy of +/-0.02 arcseconds which is smaller than the small red filled (disappearance) or open (reappearance) circles on the charts.
As a result, we ascertained that Watts' profile was too high at the side of disappearance (Watts angle 55 to 58deg) and too low at the side of reappearance (Watts angle 284 to 291deg)

 



TOTAL 25 data

Occultation of ZC   692 on 1998 10 09          Basis = 85L
   Star  J2000 Pos.   4 35 55.239   0.437    16 30 33.48 -18.94
         Mag  0.87  Sp K5III        Err in pos   0.01  0.00     DS Code  Aw
         BD+16  629     ZC  692     XZ  5912     SAO  94027     PPM 120061
         HIP  21421       

  WA   Height   WH   Diff   l     b    Observer's Name    PhenC      UTC
   o     "      "     "     o     o                               h  m   s
 38.76 -0.276 -0.18 -0.10 +6.10 +7.19 Tetsuya Matsunaga    DB 1  14 37 27.40
 52.21 -0.706 -0.69 -0.02 +6.17 +7.14 Toshiyasu Funakoshi  DB 1  14 24 21.51
 52.25 -0.700 -0.67 -0.03 +6.22 +7.14 Katsushi Nunomura    DB 1  14 19 44.18
 53.67 -0.773 -0.84a+0.07 +6.24 +7.14 Michinari Yamamoto   DB 1  14 16 07.57
 55.46 -0.485 -0.30 -0.18 +6.24 +7.13 Miyoshi Ida          DB 1  14 15 58.07
 56.09 -0.334 -0.04 -0.29 +6.21 +7.13 Kaoru Ishii          DB 1  14 18 32.48
 56.70 -0.164 +0.08 -0.24 +6.25 +7.12 Yoshiki Shimizu      DB 1  14 14 49.40
 57.22 -0.340 -0.04 -0.30 +6.31 +7.12 Tsutomu Hayamizu     DB 1  14 07 34.76
 58.09 -0.344 -0.21a-0.13 +6.21 +7.12 Mitsuru Soma         DB 1  14 18 35.37
 58.17 -0.564 -0.21 -0.35 +6.21 +7.12 Norio Sasanuma       DB 1  14 18 49.97
 58.89 -0.783 -0.78 -0.01 +6.21 +7.12 Satoshi Suzuki       DB 1  14 17 59.10
282.86 -0.164 -0.14a-0.02 +6.15 +7.03 Ryosaku Matsuzaki    RD 1  15 20 27.13
283.04 +0.035 -0.20 +0.23 +6.14 +7.03 Satoshi Suzuki       RD 1  15 21 19.60
283.77 -0.507 -0.38 -0.13 +6.14 +7.04 Yoji Kawanishi       RD 1  15 21 51.40
283.85 -0.556 -0.45 -0.10 +6.13 +7.04 Norio Sasanuma       RD 1  15 21 53.40
284.88 -0.487 -0.56 +0.07 +6.28 +7.04 Tsutomu Hayamizu     RD 1  15 05 49.86
285.29 +0.021 -0.41 +0.43 +6.19 +7.04 Yoshiki Shimizu      RD 1  15 15 32.81
286.01 +0.139 -0.28 +0.42 +6.11 +7.05 Minoru Nagase        RD 1  15 24 36.07
286.02 +0.123 -0.24 +0.36 +6.15 +7.05 Kaoru Ishii          RD 1  15 19 59.35
286.62 +0.010 -0.20 +0.21 +6.18 +7.05 Miyoshi Ida          RD 1  15 16 05.90
288.01 -0.279 -0.49 +0.21 +6.22 +7.06 Hidenori Sato        RD 1  15 12 27.36
288.82 +0.182 -0.08 +0.26 +6.10 +7.06 Yoshitomi Shiraishi  RD 1  15 25 08.80
290.11 +0.039 -0.14 +0.18 +6.16 +7.07 Katsushi Nunomura    RD 1  15 18 24.86
290.36 +0.074 -0.13 +0.20 +6.10 +7.07 Toshiyasu Funakoshi  RD 1  15 24 13.92
305.10 +1.260 +1.57 -0.31 +6.04 +7.13 Tetsuya Matsunaga    RD 1  15 27 21.40

Notes
WA    :Watts Angle
Height:Observed height above mean lunar limb
WH    :Watts Height
        "a" following the value means that the accuracy of Watts data is
        poor because the extrapolation is needed to get the data, and
        "b" means that the accuracy is very poor because of the large
        extrapolation
Diff  :Difference between Height and WH
l,b   :Libration (l,b)
Phen  :Phenomenon (DD: disappearance at dark limb, DB: disappearance at bright limb,
                   RD: reappearance at dark limb, RB: reappearance at bright limb)
C     :Certainty of event. "1" sure of event.
UTC   :Coordeinated Universal Time

* Reduced by Mitsuru SOMA (National Astronomical Observatory, Japan)
* Sendai Space Hall cooperates in occultation researches.
Back to Occultation's page
Back to Occultation's page