Delphinus - Notable features, Stars

A small N constellation.

Delphinus
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Abbreviation	Del
Genitive	Delphini
Symbology	Dolphin
Right ascension	20.7 h
Declination	+13.8°
Area	189 sq. deg. Ranked 69th
Number of stars (magnitude < 3)	0
Brightest star	Rotanev (β Del) (App. magnitude 3.63)
Meteor showers	None
Bordering constellations	Vulpecula Sagitta Aquila Aquarius Equuleus Pegasus
Visible at latitudes between +90° and −70° Best visible at 21:00 (9 p.m.) during the month of September

Delphinus (IPA: /ˌdɛlˈfʌɪnəs/, Latin: dolphin), is a rather small (ranked 69th) northern constellation very close to the celestial equator.

Notable features

Here are some of its stars:

α Del (Sualocin): B9 IV, 3.77m (multiple star system with 6 components) β Del (Rotanev): F5 IV, 4m - 4.9 m γ Del: one of the finest double stars in the sky. γ1 Del: F7 V, 5.14m γ2 Del: K1 IV, 4.27m δ Del: A7 IIIp, 4.43m The above mentioned stars form an asterism called Job's Coffin. ε Del (Deneb Dulfim, or the tail of the Dolphin) is a star of spectral class B6 III with a magnitude of 4 R Del: Mira-type variable star with a period of 285.5 days;

Stars

Stars with proper names: (9/α Del) 3.77 Sualocin [Scalovin, Svalocin, Nicolaus] < (6/β Del) 3.63 Rotanev [Rotanen, Venator] < Venator [backwards] (2/ε Del) 4.03 Deneb Dulfim [Deneb, Al Dhanab al Dulfim] < ذنب الدلفين ðanab ad-dulfīnTail of the Dolphin Stars with Bayer designations: 12/γ Del 4.27; 7/κ Del 5.07 Stars with Flamsteed designations: 1 Del 6.03; 10 Del 6.01;