TIC 430806628

TYC 3982-00017-1 · Gaia DR3 2004587272882947072 · 2MASS J22153260+5341194

Position: 22h 15m 32.62s, +53° 41′ 19.4″
V magnitude: 10.32
Where: 65 arcmin southwest of V345 Lac, in the 1.2° ring
Signal: One minimum every 1.87 days. About 0.06 mag, down to 95 percent of the light. No second minimum.

What TESS shows

Seventy-two minima in the same six sectors give

Min = BTJD 2862.3671 + 1.86948 E

The minimum falls to 95 percent of the light, 0.06 mag. The outer width is about 2.3 hours. The times scatter by 7 minutes rms, and the largest residual is 29 minutes. The phase fold has one minimum. Twice this period predicts times when the star is not faint, so the clock is one minimum every 1.87 days. The contamination ratio is 0.11. The stars 15 and 18 arcsec away have no QLP file, and the centroid shift is inside the scatter. The note is not a VSX submission.

The light curves

Six TESS sectors. Red ticks are the minima.

One minimum at 200-second cadence.

All six sectors folded on the 1.86948-day period. One minimum, and no second.

Finder chart

Real sky images (DSS2 red) with Gaia DR3 stars overlaid. North is up, east is left, J2000. Red tick marks point at the target (Gaia DR3 2004587272882947072, G = 10.28). Gold squares C1 to C5 are comparison stars of similar brightness. Tap an image for the full-size printable chart.

Wide finder, 30 × 30 arcmin, for star-hopping.

Close finder, 8 × 8 arcmin, to pick out the target.

	Gaia DR3	RA, Dec (J2000)	G	BP	RP	From target
C1	2004590605777561472	22:15:29.9 +53:44:15.6	10.88	11.12	10.49	3.0′
C2	2004573769505783296	22:15:39.6 +53:34:44.0	10.13	10.34	9.70	6.7′
C3	2004574937736969088	22:16:15.5 +53:36:50.1	10.40	10.51	10.16	7.8′
C4	2004574731561155712	22:16:17.1 +53:36:43.1	10.56	10.80	10.17	8.0′
C5	2004631974900212224	22:14:21.9 +53:43:10.2	9.55	9.65	9.32	10.6′

Comparison stars are within about 1 mag of the target in Gaia G, have similar color, no close companion, and no VSX entry within 10 arcsec. Images: DSS2 red (POSS-II, STScI Digitized Sky Survey). Stars: ESA Gaia DR3.

VSX

Not filed. VSX has no object on this star. The nearest catalogued variables are a faint rotator 52 arcsec away and a semiregular 77 arcsec away.

Next two eclipses

Eclipse 12 Nov 2026, 05:30 UTC · 1 Nov, 21:30 PST Pacific · 2 Nov, 06:30 CET central Europe
Eclipse 24 Nov 2026, 02:22 UTC · 3 Nov, 18:22 PST Pacific · 4 Nov, 03:22 CET central Europe

The fade lasts about 2.3 hours. The largest residual is 29 minutes. Stars 15 and 18 arcsec away have no TESS light curve of their own, so keep them out of the aperture if you can.

Help with a measurement

A resolved aperture, with the stars 15 and 18 arcsec away kept separate, is what shows that this star is the one fading. Pick a date if you can try.

The note

A 1.87-day minimum: TIC 430806628 (PDF)

These pages use the public TESS Quick-Look Pipeline and catalog positions. A prediction is not a confirmation. If you observe, write down which star was in the aperture.