TIC 422108500

TESS eclipses near V345 Lac

TYC 3986-01954-1 · Gaia DR3 2006040414935614336 · 2MASS J22225823+5602477

Position
22h 22m 58.24s, +56° 02′ 47.7″
V magnitude
11.82
Where
90 arcmin northeast of V345 Lac, in the 1.50–1.60° ring
Signal
EA candidate, eccentric, 6.10 days. Primary 0.24 mag, about 4 hours. Secondary 0.036 mag at phase 0.739, about 2.9 hours.

What TESS shows

Twenty-one primary minima in sectors 16, 17, 56, 57, 83, and 84 give

Min I = BTJD 3560.80094 + 6.103105 E

The deep minimum is 0.24 mag and stays below 98 percent of normal light for 4.0 hours. A shallower minimum, 0.036 mag, falls at phase 0.739 and lasts 2.9 hours below a 1.5 percent deficit. The times scatter by 9.4 minutes rms. The largest residual is 14 minutes. A ring-search period of 6.103240 days left 29 minutes of scatter on these same times, so the page uses the tighter fit. Stars 108 arcsec and farther stay at full light. The note is not a VSX submission.

The light curves

Six TESS sectors. Red ticks are the deep minima.
Six TESS sectors. Red ticks are the deep minima.
One deep minimum and the phase-0.739 minimum in sector 84. Blue is a star 108 arcsec away, at full light.
One deep minimum and the phase-0.739 minimum in sector 84. Blue is a star 108 arcsec away, at full light.
All six sectors folded on the 6.10311-day period. The deep minimum is at phase 0. The shallower minimum is at phase 0.739.
All six sectors folded on the 6.10311-day period. The deep minimum is at phase 0. The shallower minimum is at phase 0.739.

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 2006040414935614336, G = 11.43). Gold squares C1 to C5 are comparison stars of similar brightness. Tap an image for the full-size printable chart.

TIC 422108500 Wide finder, 30 × 30 arcmin, for star-hopping.
Wide finder, 30 × 30 arcmin, for star-hopping.
TIC 422108500 Close finder, 8 × 8 arcmin, to pick out the target.
Close finder, 8 × 8 arcmin, to pick out the target.
Gaia DR3RA, Dec (J2000)GBPRPFrom target
C1200604058241899545622:22:48.1 +56:03:54.611.9912.3111.511.8′
C2200604027749665932822:22:46.2 +56:01:22.312.0612.2411.742.2′
C3200604089597194291222:23:04.8 +56:04:59.612.4112.6911.962.4′

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. New addition from the 1.50–1.60° ring, 28 Oct 2026. The nearest VSX star is 49 arcsec away and is not this clock.

Next two eclipses

  1. Eclipse 1Secondary minimum, the shallower one. 2 Nov 2026, 00:07 UTC · 1 Nov, 16:07 PST Pacific · 2 Nov, 01:07 CET central Europe
  2. Eclipse 2Primary minimum, the deep one. 3 Nov 2026, 14:21 UTC · 3 Nov, 06:21 PST Pacific · 3 Nov, 15:21 CET central Europe

The deep minimum is 0.24 mag and lasts about 4 hours. The shallower one, 0.036 mag, follows 4.51 days later. The largest residual is 14 minutes. They have not been checked from the ground.

Help with a measurement

A ground eclipse, with the stars inside an arcminute kept out of the aperture, checks that this star is the one fading. Pick a date if you can try.

Which eclipse can you try?

Your email is only for arranging the observation. It is not posted on this site.

The note

A 6.103-day eclipsing binary candidate: TIC 422108500 (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.