List of stars that have unusual dimming periods

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Artist's concept of an "uneven ring of dust" orbiting KIC 8462852, also known as Tabby's Star PIA22081-KIC8462852-TabbysStar-UnevenDustRing-Illustration-20171004.png
Artist's concept of an "uneven ring of dust" orbiting KIC 8462852, also known as Tabby's Star

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]

Contents

The listing here is ordered alphabetically.

List

Tabby's Star (KIC 8462852) - Consolidated plot of all known dimmings (1 March 2020) Consolidated plot of KIC 8462852 dip maxima March 2020 update.png
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)		G3/5V9.84; [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] [lower-alpha 1] 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-III16.13–20.48 [46] —19h 37m 23.16s+17° 59′ 02.90″27,600 [47] Dust disk
Gaia21bcv K4.5V17.70–20.123.207h 14m 33.276s−12° 13′ 27.34″4,508Eclipse by a substellar companion with a 0.5 AU-radius debris disk [48]
ASASSN-21js B [lower-alpha 2] 12.81.3811h 47m 11.754s−62° 10′ 36.80″9,149Eclipse by a distant substellar companion with a 1.05 AU-radius debris disk [49]

See also

Notes

  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]

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<span class="mw-page-title-main">HD 70573</span> Star in the constellation Hydra

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<span class="mw-page-title-main">HD 37017</span> Binary star system in the constellation Orion

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<span class="mw-page-title-main">LN Andromedae</span> Star in the constellation Andromeda

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<span class="mw-page-title-main">LP Aquarii</span> Star in the constellation Aquarius

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<span class="mw-page-title-main">AA Tauri</span> Star in the constellation Taurus

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f Eridani Multiple star system in the constellation Eridanus

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<span class="mw-page-title-main">RS Telescopii</span> Star in the constellation Telescopium

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Gliese 754 is a dim star in the southern constellation of Telescopium. It has an apparent visual magnitude of 12.25, which requires a telescope to view. The star is located at a distance of 19.3 light-years from the Sun based on parallax, and it is drifting further away with a radial velocity of +7 km/s. It is one of the hundred closest stars to the Solar System. Calculations of its orbit around the Milky Way showed that it is eccentric, and indicate that it might be a thick disk object.

<span class="mw-page-title-main">HR 7484</span> Star in the constellation Cygnus

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<span class="mw-page-title-main">GW Orionis</span> Star in the constellation Orion

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HD 99706 is an orange-hued star in the northern circumpolar constellation of Ursa Major. With an apparent visual magnitude of 7.65, it is too dim to be visible to the naked eye but can be viewed with a pair of binoculars. Parallax measurements provide a distance estimate of approximately 480 light years from the Sun, and the Doppler shift shows it is drifting closer with a radial velocity of −30 km/s. It has an absolute magnitude of 2.12, indicating it would be visible to the naked eye as a 2nd magnitude star if it were located 10 parsecs away.

<span class="mw-page-title-main">RW Aurigae</span> Young binary star system in the constellation Auriga

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HD 72945 and HD 72946 form a co-moving star system in the northern constellation of Cancer. HD 72945 is a binary star that is dimly visible to the naked eye as a point of light with an apparent visual magnitude of 5.91. At an angular separation of 10.10″ is the fainter companion star HD 72946 at magnitude 7.25. It is being orbited by a brown dwarf. The system as a whole is located at a distance of approximately 84 light years from the Sun based on parallax measurements.

<span class="mw-page-title-main">RS Sagittarii</span> Eclipsing binary star system in the constellation Sagittarius

RS Sagittarii is an eclipsing binary star system in the southern constellation of Sagittarius, abbreviated RS Sgr. It is a double-lined spectroscopic binary with an orbital period of 2.416 days, indicating that the components are too close to each other to be individually resolved. The system has a combined apparent visual magnitude of 6.01, which is bright enough to be faintly visible to the naked eye. During the primary eclipse the brightness drops to magnitude 6.97, while the secondary eclipse is of magnitude 6.28. The distance to this system is approximately 1,420 light years based on parallax measurements.

References

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