SW Lac (Zákrytová dvojhvězda)
RA: 22h 53m 41.66s, DE: +37° 56' 18.60" (343.4235833283, 37.9384999997)
08.08.2026, 05:48 - 08.08.2026, 11:17 (UTC)
- Pozorovatel: Vivian Dai
- Vytvořeno: 15.08.2026, 06:17
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Stanice:
Vancouver, British Columbia, Canada. Backyard site, 40 m elevation. AAVSO observer code VDBA.
Lat: +49°, Long: -123° - Přístroj: ZWO Seestar S30 Pro: 30 mm aperture, 160 mm focal length, alt-azimuth. Sony IMX585 colour CMOS (Bayer). No filter wheel; photometry from the green channel, reported as AAVSO band TG.
- Fotometrický obor: TG
- Časový standard: BjdTbd
- Jasnost v: Mag
Poznámka:
540 points, ZWO Seestar S30 Pro. Differential photometry against the same fixed nine-star ensemble as our 2026-08-03 observation, each comparison vetted against VSX and Gaia for variability. Magnitudes are instrumental differential with an arbitrary zero point, not standard-transformed; the shape of the curve is unaffected. Times are BJD_TDB. Our own Kwee-van Woerden fit of this night gives 2461260.91902 +/- 0.00116 d, an O-C of -3.10 +/- 1.67 min against a TESS quadratic ephemeris, a residual of +0.11 sigma. AAVSO observer code VDBA.
Stanovená minima
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P: 2461260.91614 (08.08.2026, 09:59)
HJDmin: 2461260.91916 +/- 0.00048
Heliocentrická korekce: 0.00302
Kvalita dat (beta): 4 (dostatečná)
Poznámka:Fitted with the VarAstro tool over JD 2461260.8752 onward, deliberately excluding the maximum earlier in this 5.5 h window; fitting across it moved the result by 7 minutes. An independent Kwee-van Woerden fit of the same curve in our own pipeline gives 2461260.91902 +/- 0.00116 d, agreeing with this value to 12 seconds (0.11 sigma). Both BJD_TDB. Instrumental differential magnitudes against the same fixed nine-star ensemble as our 2026-08-03 observation; ZWO Seestar S30 Pro. AAVSO observer code VDBA.
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