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Variable star in the constellation Hercules
BL Herculis is a variable star in the northern constellation of Hercules. Its apparent visual magnitude ranges from 9.70 to 10.62, so it is never bright
BL_Herculis
Type of variable star
BL Herculis variables are a subclass of type II Cepheids with low luminosity and mass, that have a period of less than eight days. They are pulsating
BL_Herculis_variable
Star in the constellation Triangulum Australe
RT Trianguli Australis, or RT TrA, is a BL Herculis variable (type II Cepheid) in the constellation of Triangulum Australe. RT TrA varies between apparent
RT_Trianguli_Australis
Variable star in the constellation Virgo
A.; et al. (August 1978), "Strömgren photometry of field BL Herculis stars. I. BL Herculis and XX Virginis", Publications of the Astronomical Society
XX_Virginis
Star in the constellation Centaurus
the horizontal branch on the HR diagram. V553 Cen is classified as a BL Herculis variable, being a low–mass type II Cepheid with a period between 1 and
V553_Centauri
Type of variable star
relatively low mass, Population II stars, in common with W Virginis and BL Herculis variables, the type II Cepheids. Classical Cepheid variables are higher
RR_Lyrae_variable
Star that has a supergiant luminosity class, with a spectral type of F or G
population II stars with low masses, including W Virginis variables, BL Herculis variables and RV Tauri variables. The Classical Cepheids are more luminous
Yellow_supergiant
Star in the constellation Pyxis
VY Pyxidis is a BL Herculis variable (type II Cepheid) in the constellation of Pyxis. It ranges between apparent magnitudes 7.13 and 7.40 over a period
VY_Pyxidis
Type of variable star that pulsates radially
include: W Virginis, Kappa Pavonis and BL Herculis. Anomalous Cepheids include: XZ Ceti (overtone pulsation mode) and BL Boötis. Smith, D. H. (1984). "Eddington's
Cepheid_variable
Type of variable star
Cepheids and cepheid-like Type I (Classical cepheids, Delta Scuti) Type II (BL Herculis, W Virginis, RV Tauri) RR Lyrae Rapidly oscillating Ap SX Phoenicis Blue-white
Rapidly_oscillating_Ap_star
Constellation in the southern celestial hemisphere
varies between magnitudes 6.99 and 7.83 over 159 days. VY Pyxidis is a BL Herculis variable (type II Cepheid), ranging between apparent magnitudes 7.13
Pyxis
Variable star in the constellation Virgo
David L. (2007). "The Chemical Compositions of the Type II Cepheids-The BL Herculis and W Virginis Variables". The Astrophysical Journal. 666 (1): 378–392
W_Virginis
Type of variable stars
of their period. Stars with periods between 1 and 4 days are of the BL Herculis subclass and 10–20 days belong to the W Virginis subclass. Stars with
Type_II_Cepheid
Star in the constellation Camelopardalis
other relatively bright examples are known, two of which are of the BL Herculis sub-type. The atmosphere contains more carbon than oxygen but is not
RU_Camelopardalis
Binary star in the constellation Hercules
Rho Herculis (ρ Her, ρ Herculis) is a double star in the constellation of Hercules. The apparent magnitudes of the components are 4.510 and 5.398, respectively
Rho_Herculis
Minor galaxy cluster in the constellation Hercules
NGC 6241. Half a degree north of Zwicky's Triplet, the double star 52 Herculis (magnitude + 4) could act as guidestar to try to find Zwicky's Triplet
Zwicky's_Triplet
Variable star in the constellation Hercules
Omega Herculis (ω Herculis, abbreviated Omega Her, ω Her) is a binary star system in the northern constellation of Hercules. Based upon an annual parallax
Omega_Herculis
Star in the constellation Hercules
Xi Herculis is a solitary star located within the northern constellation of Hercules. The star is visible to the naked eye with an apparent visual magnitude
Xi_Herculis
Star in the constellation Telescopium
periods, 92.5 days and 64.8 days in length. It has been classified as a UU Herculis variable—a class of yellow supergiant with semiregular variability. These
BL_Telescopii
Star whose brightness fluctuates, as seen from Earth
hole. A notable example of such a variable X-ray source is Cygnus X-1. DQ Herculis systems are interacting binaries in which a low-mass star transfers mass
Variable_star
Binary star in the constellation Hercules
Sigma Herculis, Latinized from σ Her, is a binary star system in the northern constellation of Hercules. It has a combined apparent visual magnitude of
Sigma_Herculis
Globular cluster in the constellation Hercules
seen in this asterism 2⁄3 of the way north (by west) from Zeta to Eta Herculis. With an apparent magnitude of 5.8, Messier 13 may be visible to the naked
Messier_13
Star in the constellation Hercules
Phi Herculis (φ Her) is a binary star system in the northern constellation of Hercules. Based upon an annual parallax shift of 15.99 mas as seen from Earth
Phi_Herculis
Star in the constellation Hercules
Upsilon Herculis (υ Her) is a solitary star in the constellation Hercules. It is visible to the naked eye with an apparent visual magnitude of 4.74. Based
Upsilon_Herculis
Constellation in the northern celestial hemisphere
Kappa, Mu, Nu and Pi as two stars each. Nu is also the same star as Psi Herculis. John Flamsteed numbered 54 stars for the constellation. Located 36.7 light-years
Boötes
Hertzsprung SONG Telescope: Asteroseismology of the G5 Subgiant Star μ Herculis". The Astrophysical Journal. 836 (1): 142. arXiv:1701.03365. Bibcode:2017ApJ
List of nearest stars by spectral type
List_of_nearest_stars_by_spectral_type
Constellation in the southern celestial hemisphere
activity. BL Hydri is another close binary system composed of a low-mass star and a strongly magnetic white dwarf. Known as a polar or AM Herculis variable
Hydrus
Sun-like star in the constellation Hercules
Chi Herculis, Latinized from χ Herculis, is a Sun-like star in the northern constellation of Hercules. Based upon an annual parallax shift of 62.1 mas
Chi_Herculis
Quasar in the Hercules constellation
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
3C_345
Middle Eastern goddess, worshipped from the Bronze Age through classical antiquity
Latin inscription from the Roman imperial period refers to a priest named Herculis whose father was named Junonis, reflecting the Punic association of "Hercules"
Astarte
Binary star system in the constellation of Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
HR_6594
Galaxy in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
QSO_J1819+3845
Genus of shrubs and trees
(De Wild.) P.G.Waterman (west central tropical Africa) Zanthoxylum clava-herculis L. – Hercules' club, pepperbark, southern prickly ash, West Indian yellowwood
Zanthoxylum
Italian classical scholar and Renaissance humanist (1331–1406)
philosophy of later Renaissance republicans. His unfinished De laboribus Herculis represents an ambitious allegorical-philosophical project interpreting
Coluccio_Salutati
Nebula in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
Abell_39
Galaxy in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
A2261-BCG
J1928+1815 455 Sagitta PSR The closest known Millisecond pulsar to earth. Iota Herculis$ (Tianbang) 455 ± 8 Hercules 17h 39m 27.8864s +46° 00′ 22.795″ B3IV 3.80#
List of star systems within 450–500 light-years
List_of_star_systems_within_450–500_light-years
Radio-source galaxy in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
Hercules_A
Binary star system in the constellation Telescopium
source for X-ray emission. Variable stars Polar (cataclysmic variable) AM Herculis Rosen, S. R.; Mittaz, J. P. D.; Buckley, D. A.; Layden, A. C.; Clayton
QS_Telescopii
Galaxy cluster in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
Abell_2152
Star in the constellation Hercules
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
HD_163840
Distant galaxy merger
WISE 1711+3500 WISE 1738+2732 WISE 1741+2553 ZTF J1813+4251 Exoplanets 14 Herculis b c Gliese 649 b HAT-P-2b (Magor) HAT-P-14b (Sissi) HD 149026 b (Smertrios)
LBG-2377
Gliese 884 (in Aquarius) K5 7.88 8.33 23h 00m 16.12s −22° 31′ 27.6″ 26.6 μ Herculis G5IV 3.42 3.80 17h 46m 27.53s +27° 43′ 14.4″ 27.1 β Canum Venaticorum (Chara)
List_of_nearest_bright_stars
Binary star in the constellation Boötes
assigned it a designation in both constellations: Nu Boötis (ν Boo) and Psi Herculis (ψ Her). When the modern constellation boundaries were fixed in 1930, the
Nu2_Boötis
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