TIC 422224891

TYC 3986-02730-1 · Gaia DR3 2005211898564062080 · 2MASS J22240323+5525237

Position: 22h 24m 03.23s, +55° 25′ 23.6″
V magnitude: 12.38
Where: 64 arcmin northeast of V345 Lac, in the 1.2° ring
Signal: One minimum every 2.99 days, star not assigned. About 0.08 mag, down to 93 percent of the aperture light. A star 38 arcsec away fades by the same amount.

What TESS shows

Forty-six minima in sectors 16, 17, 56, 57, 83, and 84 give

Min = BTJD 2863.1503 + 2.98922 E

The aperture falls to 93 percent of its light, 0.08 mag. The halfway width is about 2.1 hours, and the whole fade is about 3.1 hours. The times scatter by 10 minutes rms. The largest residual is 25 minutes. Odd and even cycles have the same depth, and there is no second minimum. TIC 316948586, 38 arcsec away, V = 13.47, fades to the same 93 percent on this clock. TIC 422224775, a V = 9.56 star 113 arcsec away, stays at full light. The contamination ratio is 0.63. TESS does not say which of the close pair is eclipsing. The note is not a VSX submission.

The light curves

Six TESS sectors. Red ticks are the minima.

One minimum. Black is TIC 422224891. Blue, 38 arcsec away, fades with it. Green, 113 arcsec away, stays at full light.

Both stars folded on the 2.98922-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 2005211898564062080, G = 12.29). 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.

Neighbor that also fades: TIC 316948586 (Gaia DR3 2005211829844770944, G = 13.16) sits 37.6 arcsec away at position angle 59° and fades on the same clock. It is the magenta diamond marked N. Measure it in its own aperture, separately from the target.

	Gaia DR3	RA, Dec (J2000)	G	BP	RP	From target
C1	2005211383167989248	22:23:50.6 +55:23:32.1	11.87	12.17	11.39	2.6′
C2	2005215197099106432	22:23:53.3 +55:28:16.0	13.15	13.30	12.83	3.2′
C3	2005211623686142464	22:23:37.6 +55:24:08.0	11.87	12.10	11.35	3.9′
C4	2005200731649305984	22:24:40.7 +55:25:29.6	12.89	13.15	12.47	5.3′
C5	2005188052905231872	22:23:31.6 +55:22:32.7	13.17	13.33	12.90	5.3′

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 period is measured, and TIC 316948586, 38 arcsec away, fades on the same clock. The contamination ratio is 0.63.

Next two eclipses

Eclipse 11 Nov 2026, 07:09 UTC · 1 Nov, 00:09 PDT Pacific · 1 Nov, 08:09 CET central Europe
Eclipse 24 Nov 2026, 06:54 UTC · 3 Nov, 22:54 PST Pacific · 4 Nov, 07:54 CET central Europe

These times are when the TESS aperture fades. The fade lasts about three hours. A star 38 arcsec away, TIC 316948586, fades by the same amount. Separate apertures are the measurement. The largest residual in the forty-six minima is 25 minutes.

Help with a measurement

The useful measurement is two apertures, one on this star and one on TIC 316948586, 38 arcsec away. Pick a date if you can try.

The note

A 2.99-day minimum in a blended aperture: TIC 422224891 (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.