A 5.48 second occultation was recorded by Dave Herald, using video OSD technique.

View the updated prediction.

Observers:
  1    D Herald,Kambah, ACT,AU
  2(P) Prediction 6 Aug
    

Discussion:

The circle above is plotted at the expected 82 km diameter of Dike. With only one chord it is not possible to determine whether Dave was north or south of the central line of the event.

The figure below shows the light curve of the occultation.

There is a hint of a step in the D above and the specials catalogs list the star as double.

WDS entries

  RA  Dec Name          Y1   Y2     N  PA  PA   Sep   Sep  M1    M2
04182+2317PAT   3      1995 1995    1 152 152   1.0   1.0  9.55 12.5  K0
------------------------------------------------
Interferometric catalogue entries
041810.78+231704.7  BD+22  669                PAT   3                   HD 284303    TYC 1815 01949 1   04182+2317
    Date       PA              Sep                  M1             M2
  1995.866    152.     2.      1.02      0.02        .      .      2.9    0.1     2200 400   5.0   1  Pat1998  Sir
------------------------------------------------
AAVSO Variable star entry

       Variable identifier           Type        Max    Min  Ph  Epoch         Period
       NSV 15941                     RS          9.1                            1.8787

I (jt) agree that the D looks stepped (frames 395-397) but there is as similar level dimming at 367-369 which makes me suspect noise. 397 looks dimmer than 369 though Limovie measures it brighter. This also suggests noise. If the step was more than just the 3 points I might feel more inclined to say double. For the R there is an apparent brightening at 530 but there is no corresponding star image in the frame just a noise smear. At 533 there is a star image that Limovie measures dimmer than 530. At 542 the star image is barely visible but Limovie measures it almost the same as 565 which has clear bright star image. Again I don’t think I am seeing reliable double symptoms.

Looking at the Google Sky image for the star there is a suggestion of double diffraction spikes N-S that support the double possibility.

As the Scottish courts would say "Not Proven".

Had there been more positives that had similar symptoms we might have been able to assert another double observation.

Observational Data:

Observation details for MP (99) Dike
By Star              TYC 1815-01949-1
On 2009-09-08  at 15:53:36.0

_______________________________

Observer   Dave Herald
Location   Kambah, ACT,AU
Longitude  +149:03:48.9
Latitude   -35:23:49.3
Altitude   582 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   35 cm
Seeing     Slight flickering Thin cloud < 2
Timing     GPS - time inserted Video with frame analysis
Disappearance  15:53:33.96
Reappearance   15:53:39.42
Comments: Minor obstruction by a tree.
Report prepopulated by OccultWatcher's Reporting Addin ver.1.1