TIC 329864959

TYC 3969-01411-1 · HIP 109669 · 2MASS J22125879+5359043

Position: 22h 12m 58.79s, +53° 59′ 04.3″
V magnitude: 8.54
Where: 65 arcmin southwest of V345 Lac, in the 1.2° ring
Signal: Shallow minimum, 4.52 days. About 0.03 mag, lasting about 4.5 hours. The middle can be off by about 80 minutes.

What TESS shows

Thirty minima of this V = 8.54 star, HIP 109669, give

Min = BTJD 2848.0774 + 4.52285 E

The minimum falls to 97 percent of the light, 0.03 mag, and lasts about 4.5 hours. The times scatter by 44 minutes rms. The largest residual is 83 minutes. Two predicted times in the sectors stay at full light. There is no second minimum. Neighbors inside an arcminute are about five magnitudes fainter, so the dip is hard to put on one of them. VSX stars at 23, 28, and 58 arcsec are those faint neighbors, not HIP 109669. The dip is too shallow to file. The note is not a VSX submission.

The light curves

Six TESS sectors. Red ticks are the minima. The dips are shallow on a sector plot.

One minimum. The line is the ephemeris.

All six sectors folded on the 4.52285-day period.

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 2004653277938044672, G = 9.02). 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	2004652040987250048	22:12:49.7 +53:56:14.6	9.81	9.93	9.58	3.1′
C2	2004649154770484608	22:13:09.2 +53:54:13.7	8.98	9.00	8.66	5.1′
C3	2005405446971925120	22:12:47.1 +54:05:41.9	9.29	9.51	8.92	6.8′
C4	2005408676787299968	22:12:25.2 +54:07:13.5	9.01	9.07	8.85	9.5′

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. The dip is shallow. VSX objects 23, 28, and 58 arcsec away are fainter neighbors, not this star.

Next two eclipses

Eclipse 131 Oct 2026, 15:18 UTC · 31 Oct, 08:18 PDT Pacific · 31 Oct, 16:18 CET central Europe
Eclipse 25 Nov 2026, 03:51 UTC · 4 Nov, 19:51 PST Pacific · 5 Nov, 04:51 CET central Europe

Start about 90 minutes before the predicted middle and keep going 90 minutes after. The dip is 0.03 mag. A visual glance will not show it. Keep the faint variables 23 and 28 arcsec away out of the aperture.

Help with a measurement

The dip is 0.03 mag, and the middle can be off by about 80 minutes. A camera can time it if the faint stars 23 and 28 arcsec away stay out of the aperture. Pick a date if you can try.

The note

A shallow 4.52-day minimum: TIC 329864959 (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.