List of stars in Hydrus explained

This is the list of notable stars in the constellation Hydrus, sorted by decreasing brightness.

Name	B	Var	HD	HIP	RA	Dec	vis. mag.	abs. mag.	Dist. (ly)	Sp. class	Notes
	β		2151	2021			2.79	3.45	24	G2IV	suspected variable,
	α		12311	9236			2.86	1.16	71	F0V	Head of Hydrus
	γ		24512	17678			3.26	−0.83	214	M2III	Foo Pih; semiregular variable
	δ		15008	11001			4.08	0.99	135	A3V
	ε		16978	12394			4.12	0.76	153	B9III
	η^2		11977	8928			4.68	0.57	217	G5III	has a planet (b)
	ν		18293	13244			4.76	−0.26	329	K3III
	ζ		17566	12876			4.83	0.05	295	A2IV/V
λ Hyi	λ		4815	3781			5.09	1.10	205	K5III
μ Hyi	μ		16522	11757			5.27	0.51	292	G4III
	θ		19400	14131			5.51	−0.52	525	B8III/IV
ι Hyi	ι		21024	15201			5.51	3.17	96	F4IV-V
π^1 Hyi	π^1		14141	10418			5.57	−1.21	739	M1III	suspected variable,
π^2 Hyi	π^2		14287	10513			5.67	−0.11	468	K2III
		BN	20313	14521			5.70	1.26	248	F2II-III	δ Sct variable,
			10615	7921			5.70	0.42	371	K2/K3III
			8810	6631			5.92	−1.53	1009	M0III
			1801	1706			5.96	−0.69	697	K3III
			21722	15968			5.96	2.99	128	F3V
κ Hyi	κ		15248	11095			5.99	1.05	318	K0III	suspected variable
			9896	7387			6.03	3.00	132	F2V
τ^2 Hyi	τ^2		11604	8366			6.05	2.09	202	F0III
			11995	8983			6.07	2.73	152	F0IV/V
			12477	9318			6.09	0.50	428	K2III
			10042	7271			6.11	0.46	441	G3IV
			19940	14547			6.12	1.30	300	K1III
			21563	15840			6.14	−0.17	595	A4:V+...
σ Hyi	σ		12363	8991			6.15	3.07	135	F5/F6IV/V
			10052	7506			6.18	−0.78	805	M3III	semiregular variable,
		CT	24188	17543			6.26	0.50	463	B8V	α^2 CVn variable
τ^1 Hyi	τ^1		10859	7879			6.33	0.91	395	G6/G8III
			12270	9149			6.36	0.28	535	G8II/III
			11944	8957			6.43	2.73	179	F2V
			1221	1268			6.49	−0.18	704	G8/K0III
			1237	1292			6.59	5.36	57	G8.5Vk	has a planet (b)
		CN	17653	12884			6.66		195.8	F6V	W UMa variable
	η^1		11733	8751			6.77	−0.03	748	B9V	suspected variable
			10180	7599			7.33	4.36	128	G1V	has six confirmed planets (c, d, e, f, g and h) and three unconfirmed planets (b, i and j)
			20003	14530			8.37		143	G8V	has two planets (b & c)
		BT	19918	14026			9.35		801	Ap...	rapidly oscillating Ap star
			2685				9.59		646	Ap...	has a planet (b)
							10.8		763	G2	has a transiting planet (b)
		VW					14.4				SU UMa variable,
							14.7			K	oldest known star as of 2014
		WX					14.85				SU UMa variable,
		BL					14.9			Am	AM Her variable and eclipsing binary,

See also

• List of stars by constellation

References

• Web site: ESA . European Space Agency . The Hipparcos and Tycho Catalogues . 1997 . 2006-12-26 .
• Web site: Kostjuk . N. D. . HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index . 2002 . 2006-12-26 .
• Web site: Roman . N. G. . Identification of a Constellation from a Position . 1987 . 2006-12-26 .
• Web site: Gould . B. A. . Uranometria Argentina . Reprinted and updated by Pilcher, F . 2010-07-16 . dead . https://web.archive.org/web/20120227032716/http://www.uranometriaargentina.com/ . 2012-02-27 .
• Web site: AAVSO Website . American Association of Variable Star Observers . 9 March 2014 .