Notices of the Royal Astronomical Society. 281 (2): 644–658. Bibcode:1996MNRAS.281..644T. doi:10.1093/mnras/281.2.644. Dahn, C. C.; Harris, Hugh C.; Vrba, Frederick...

Alphard /ˈælfɑːrd/, designated Alpha Hydrae (α Hydrae, abbreviated Alpha Hya, α Hya), is the brightest star in the constellation of Hydra. It is a single...

TW Hydrae is a T Tauri star approximately 196 light-years away in the constellation of Hydra (the Sea Serpent). TW Hydrae is about 80% of the mass of the...

6; -294.5 Hyblaeus Chasma 22°00′N 141°12′E / 22°N 141.2°E / 22; 141.2 Hydrae Chasma 6°48′S 62°00′W / 6.8°S 62.0°W / -6.8; -62.0 Ius Chasma 6°54′S...

designated Alpha Hydrae. It is an orange giant of magnitude 2.0, 177 light-years from Earth. Its traditional name means "the solitary one". Beta Hydrae is a blue-white...

Epsilon Hydrae, Delta Hydrae, Sigma Hydrae, Eta Hydrae, Rho Hydrae, Zeta Hydrae, Omega Hydrae and Theta Hydrae Consequently, Epsilon Hydrae itself is...

R Hydrae, abbreviated R Hya, is a single star in the equatorial constellation of Hydra, about 2.7° to the east of Gamma Hydrae. It is a Mira-type variable...

of Sigma Hydrae, Delta Hydrae, Eta Hydrae, Rho Hydrae, Epsilon Hydrae, Zeta Hydrae, Omega Hydrae and Theta Hydrae. Consequently, Sigma Hydrae itself is...

asterism consisting of δ Hydrae, σ Hydrae, η Hydrae, ρ Hydrae, ε Hydrae, ζ Hydrae, ω Hydrae and θ Hydrae Consequently, δ Hydrae itself is known as 柳宿一 (Liǔ...

V Hydrae (V Hya) is a carbon star in the constellation Hydra. To date perhaps uniquely in our galaxy it has plasma ejections/eruptions on a grand scale...

Tau1 Hydrae is a triple star system in the equatorial constellation of Hydra. Based upon the annual parallax shift of the two visible components as seen...

HS Hydrae is a triple star system in the equatorial constellation of Hydra. The inner pair were an eclipsing binary during the period 1920 until 2019,...

the spectral type of A7V, as opposed to the slow-rotating standard star 2 Hydrae. It is also a Delta Scuti variable, and its apparent magnitude varies from...

The Bayer designation Tau Hydrae (τ Hya, τ Hydrae) is shared by two star systems in the equatorial constellation of Hydra. The two stars are separated...

Hydrae is a single variable star in the equatorial constellation of Hydra. It is sometimes identified as Gl 355 from the Gliese Catalogue; LQ Hydrae is...

binaries. I. Description of methods, and results for RS Chamaeleontis and chi 2 Hydrae". Astronomy and Astrophysics. 44: 445–458. Bibcode:1975A&A....44..445A...

The TW Hydrae association is a group of very young low-mass stars and substellar objects located approximately 25–75 parsecs (80–240 light years) from...

W Hydrae is a Mira-type variable star in the constellation Hydra. The star is nearly located within the Solar neighborhood, between 75 and 120 parsecs...

Sun. ι Hydrae (Latinised to Iota Hydrae) is the star's Bayer designation. This star along with Tau¹ Hydrae, Tau² Hydrae and 33 Hydrae (A Hydrae), were...

Gamma Hydrae (γ Hya, γ Hydrae) is a binary star in the equatorial constellation of Hydra. It has an apparent visual magnitude of 3.0, placing it second...

Nu Hydrae, Latinized from ν Hydrae, is an orange-hued star in the constellation Hydra, near the border with the neighboring constellation of Crater. It...

TW Hydrae b is a likely extrasolar planet orbiting the young T Tauri star TW Hydrae approximately 176 light-years (54 parsecs, or nearly 1.665×1016 km)...

consisting of Upsilon1 Hydrae, Lambda Hydrae, Mu Hydrae, HD 87344, Kappa Hydrae and Phi1 Hydrae. Consequently, Upsilon1 Hydrae itself is known as 張宿一...

Phi3 Hydrae (φ3 Hya) is a binary star in the equatorial constellation of Hydra. It originally received the Flamsteed designation of 2 Crateris before being...

Beta Hydrae, Latinized from β Hydrae, is a double star in the equatorial constellation of Hydra. Historically, Beta Hydrae was designated 28 Crateris...

U Hydrae is a single star in the equatorial constellation of Hydra, near the northern constellation border with Sextans. It is a semiregular variable star...

defined by T=28,000–35,000 K (27,700–34,700 °C; 49,900–62,500 °F) and log g=5.2–6.0. Only 10% of sdBs falling in the empirical strip are observed to pulsate...

Xi Hydrae, Latinised from ξ Hydrae, is a solitary star in the equatorial constellation of Hydra. It was also given the Flamsteed designation 19 Crateris...

Upsilon2 Hydrae, Latinised from υ2 Hydrae, is a solitary star in the equatorial constellation of Hydra. Visible to the naked eye, it is photometrically...

Tau2 Hydrae is a probable astrometric binary star system in the equatorial constellation of Hydra. Based upon an annual parallax shift of 6.30 mas as seen...