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List of stars that have unusual dimming periods

This list of stars that have unusual dimming periods is a table of stars that have been observed to darken and brighten and do not appear to be eclipsing binaries or intrinsic variables. It is based on studies searching for analogs of Tabby's Star.[1][2]

Artist's concept of an "uneven ring of dust" orbiting KIC 8462852, also known as Tabby's Star

The listing here is ordered alphabetically.

List

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Tabby's Star (KIC 8462852) – Consolidated plot of all known dimmings (1 March 2020)
Star designation Stellar
class 		Magnitude Right ascension
(J2000) 		Declination
(J2000) 		Distance
(light-years) 		Reason for dimming
Apparent Absolute
ASASSN-V J193622.23+115244.1 — 14.0–15.5[3] — 19h 36m 22.23s[3] +11° 52′ 44.1″[3] 6592[3] Unknown
ASASSN-V J213939.3-702817.4 F0V[4] 12.95–14.22[5] 2.5[5] 21h 39m 39.3s[5] −70° 28′ 17.4″[5] 3630[4] Unknown
Betelgeuse M1-2[6] +0.50[7] — 05h 55m 10.30536s[8] +07° 24′ 25.4304″[8] — "large-grain circumstellar dust"[9][10]
EPIC 204278916 M1[11] 13.7[12] — 16h 02m 07.576s[13] −22° 57′ 46.89″[13] — Dust disk
EPIC 204376071 M[14] — — 16h 04m 10.1267s[15] −22° 34′ 45.5503″[15] 440[14] Possibly giant planet or brown dwarf with rings
HD 139139
(EPIC 249706694) 		G3/5V 9.84;[16] 9.677[17] — 15h 37m 06.215s[17] −19° 08′ 32.96″[17] 350[18]
572[17] 		Unknown
KH 15D K7[19] 15.5–21.5[20] 6.226[21] 06h 41m 10.31s[22] +09° 28′ 33.2″[22] 773[23] Possibly circumbinary disk
KIC 4150611
(HD 181469) 		Pulsator/K/M/G — — 19h 18m 58.21759s[24] +39° 16′ 01.7913″[24] — Five-star system
PDS 110 keF6 IVeb[25] 10.422[25] 2.54[25] 05h 23m 31.008s[25] –01° 04′ 23.68″[25] 1090[25] Possibly eclipses by circumstellar dust[26]
RW Cephei K2 0-Ia[27] 6.0–7.6[28] — 22h 23m 07.01521s[29] +55° 57′ 47.6244″[29] 11,000[30][a] Great dimming event similar to Betelgeuse
RZ Piscium K0 IV[31] 11.29–13.82[31] — 01h 09m 42.056s[32] +27° 57′ 1.95″[32] 550[33] Substantial mass of gas and dust, possibly from disrupted planet
Tabby's Star
(KIC 8462852) 		F3V[34][35] 11.705[35] 3.08[34] 20h 06m 15.4527s[34] +44° 27′ 24.791″[34] 1470[34] Unknown
TIC 400799224 — — — — — — "probably from an orbiting body that periodically emits clouds of dust that occult the star"[36][37]
V1400 Centauri K5 IV(e) Li[38] 12.31[38] — 14h 07m 47.93s[38] −39° 45′ 42.7″[38] 434[39] Eclipse by a free-floating brown dwarf or rogue planet with a circumstellar disk or ring system[40]
VVV-WIT-07 — 14.35–16.164[41] — 17h 26m 29.387s[41] −35° 40′ 6.20″[41] 23000/?[41] Unknown
VVV-WIT-08 — — — — — — Probably a black hole companion or a free-floating brown dwarf with a circumstellar disk
WD 1145+017
(EPIC 201563164) 		DB[42] 17.0[43] — 11h 48m 33.63s[42] +01° 28′ 59.4″[42] 570[44] Dust disk
ZTF J0139+5245
(ZTF J013906.17+524536.89) 		DA[45] 18.4[45] — 01h 39m 06.17s +52° 45′ 36.89″ 564[45] Dust disk
Gaia17bpp M0-III 16.13–20.48[46] — 19h 37m 23.16s +17° 59′ 02.90″ 27,600[47] Dust disk
Gaia21bcv K4.5V 17.70–20.12 3.2 07h 14m 33.276s −12° 13′ 27.34″ 4,508 Eclipse by a substellar companion with a 0.5 AU-radius debris disk[48]
ASASSN-21js B[b] 12.8 1.38 11h 47m 11.754s −62° 10′ 36.80″ 9,149 Eclipse by a distant substellar companion with a 1.05 AU-radius debris disk[49]

See also

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Notes

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  1. ^ Assuming membership to Cepheus OB1
  2. ^ ASASSN-21js's temperature of 14800+4200
    −2800     K     lies within the temperature range for B-type main-sequence stars.[49]

References

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  1. ^ Starr, Michelle (28 September 2019). "Astronomers Have Found Another 21 Stars Dimming as Erratically as Tabby's Star". ScienceAlert. Retrieved 28 September 2019.
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  3. ^ a b c d Way, Z.; et al. (11 September 2020). "ASAS-SN Discovery of a Luminous Star undergoing a Deep Dimming Event". The Astronomer's Telegram. Retrieved 13 September 2020.
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