- Double Stars (Lyr) -

And (32)	Cep (13)	CVn (11)	Her (15)	Mon (1)	Sex (2)
Aql (9)	Cet (1)	Cyg (25)	Hya (4)	Oph (1)	Tau (11)
Ari (8)	CMa (1)	Del (4)	Leo (21)	Ori (8)	Tri (4)
Aur (27)	Cnc (10)	Dra (11)	Lib (1)	Peg (16)	UMa (36)
Boo (19)	Com (8)	Equ (5)	LMi (6)	Per (18)	UMi (1)
Cam (10)	CrB (4)	Eri (1)	Lyn (18)	Psc (7)	Vir (6)
Cas (17)	Crv (1)	Gem (19)	Lyr (11)	Ser (3)	Vul (3)

beta Lyr (**)

Name:	beta Lyr, 10 Lyr
Type:	**
Constellation:	Lyr
Coordinates:	18h50m04.79s / +33°21'45.60"

Components:
		m₁	m₂	ρ	θ	Year
STFA39	AB	3m6	6m7	45.7"	149°	2017
BU293	AE	3m6	10m1	67.2"	317°	2015
BU293	AF	3m6	10m6	86.0"	18°	2015

Robert Zebahl
70mm f/5.7, 22x At 22x and 57x the components A, B, E and F were easily seen. The B component appeared slightly bluish-silver at 22x, but at 57x the color was difficult to tell. All four components form a slightly curved 'Y' with the bright A component in the center.
102mm f/11, 62x, Bortle 6 Components A, B, E and F are easily visible. The two southern stars on the drawing do not belong to the system.

epsilon Lyr (**)

Name:	epsilon Lyr
Type:	**
Constellation:	Lyr
Coordinates:	18h44m20.34s / +39°40'12.40"

Components:
		m₁	m₂	ρ	θ	Year
STFA37	AB-CD	4m7	4m6	209.5"	172°	2016
STFA37	AI	5m2	10m1	149.5"	137°	2015
STF2382, 4 Lyr, epsilon 1 Lyr	AB	5m2	6m1	2.2"	346°	2018
STF2383, 5 Lyr, epsilon 2 Lyr	CD	5m2	5m4	2.4"	75°	2018



Robert Zebahl
55mm f/9.1, 59x STF2382 (AB): At 42x slightly elongated, at 59x elongated and obviously notched.
55mm f/9.1, 59x STF2383 (CD): At 42x clearly elongated, but without any visible notch. At 59x split with touching diffraction disks.
70mm f/5.7, 57x STF2382 (AB): Obviously seen as figure '8'.
70mm f/5.7, 57x STF2383 (CD): Split, but extremely tight with almost touching diffraction disks.
102mm f/11, 125x, Bortle 6, SQM-L 19.4 Stunning view of the components A-D and I!

STF 2333 (**)

Name:	STF2333
Type:	**
Constellation:	Lyr
Coordinates:	18h31m06.94s / +32°14'43.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	8m6	6.3"	333°	2019
	AC	7m8	12m9	164.1"	35°	2015
	AD	7m8	13m7	85.8"	339°	2015
	BC	8m6	12m9	161.1"	37°	2015

Robert Zebahl
70mm f/5.7, 57x, Bortle 6 AB: 2020-05-15: Clearly separated with a noticeable difference in brightness. All in all rather faint double star without visible colors.
152mm f/5.9, 49x, Bortle 6, SQM-L 19.6 AB: 2020-06-24: At 22x clearly elongated and almost separated. A difference in brightness can be seen. At 49x clearly separated with slight color difference: whitish and white-bluish.

STF 2349 (**)

Name:	STF2349
Type:	**
Constellation:	Lyr
Coordinates:	18h36m37.34s / +33°28'08.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m4	9m4	7.2"	204°	2016

Robert Zebahl
102mm f/11, 125x, Bortle 6 Easy to split with a clear difference in brightness. The companion only appeared as a tiny star.

STF 2351 (**)

Name:	STF2351
Type:	**
Constellation:	Lyr
Coordinates:	18h36m12.00s / +41°16'41.20"

Components:
		m₁	m₂	ρ	θ	Year
		7m6	7m6	5.0"	160°	2019

Robert Zebahl
70mm f/5.7, 57x Beautiful, little double star with equally bright components at a moderate distance.

STF 2461 (**)

Name:	STF2461, 17 Lyr
Type:	**
Constellation:	Lyr
Coordinates:	19h07m25.58s / +32°30'06.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m3	9m1	3.2"	281°	2017

Robert Zebahl
152mm f/5.9, 129x, Bortle 6 At 129x clearly split. The B component was just visible as pretty faint, tiny star. At 270x much easier visible.

STF 2470 (**)

Name:	STF2470
Type:	**
Constellation:	Lyr
Coordinates:	19h08m45.20s / +34°45'37.10"

Components:
		m₁	m₂	ρ	θ	Year
		7m0	8m4	13.8"	267°	2017

Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 2020-07-06: Striking with well visible brightness difference. Very nice together with STF2474, which gives a similar view. A double-double for binoculars.
102mm f/11, 40x, Bortle 6, SQM-L 19.4 Striking, especially with STF 2474 in one visual field. The color of the components was not clearly visible. Worthwhile! Sketch see STF 2474.

STF 2474 (**)

Name:	STF2474
Type:	**
Constellation:	Lyr
Coordinates:	19h09m04.35s / +34°35'59.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m8	7m9	15.9"	264°	2018

Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 2020-07-06: Striking with well visible brightness difference. Very nice together with STF2470, which gives a similar view. A double-double for binoculars.
102mm f/11, 40x, Bortle 6, SQM-L 19.4 Pretty conspicuous, easy double star. Especially attractive with the nearby double star STF 2470, as both are very similar in brightness, distance and position angle. The color of both components appeared slightly yellowish-orange.

STF 2483 (**)

Name:	STF2483
Type:	**
Constellation:	Lyr
Coordinates:	19h12m23.60s / +30°20'51.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m0	9m1	10.0"	317°	2015
	AC	8m0	9m7	71.2"	236°	2015
	BC	9m1	9m7	70.4"	228°	2015

Robert Zebahl
152mm f/5.9, 49x, Bortle 6, SQM-L 19.6 2020-06-24: At 22x, all three components are well visible and form a prominent, acute-angled triangle with the dim C component at the apex. At 49x color differences become visible: A appears white-yellowish, B slightly bluish and C rather orange.

STT 525 & SHJ282 (**)

Name:	STT525 & SHJ282, WDS18549+3358
Type:	**
Constellation:	Lyr
Coordinates:	18h54m52.52s / +33°58'06.90"

Components:
		m₁	m₂	ρ	θ	Year
STT525	AB	6m1	9m1	1.8"	130°	2015
SHJ282	AC	6m1	7m6	45.4"	350°	2018
SHJ282	AD	6m1	11m0	214.8"	295°	2015

Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 SHJ282 (AC): 2020-07-06: Easy, striking with reasonably apparent color contrast: yellowish to slightly orange & bluish.
70mm f/5.7, 22x, Bortle 6-, SQM-L 19.2 SHJ282 (AC): Fairly bright and wide pair. The double star was conspicuous, especially in regard to its color: A appeared orange, C rather grey-bluish. It could be observed together with Messier 57 and beta & gamma Lyrae. Very nice.

STTA 181 (**)

Name:	STTA181
Type:	**
Constellation:	Lyr
Coordinates:	19h20m07.47s / +26°38'41.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m4	7m5	62.7"	-	2018
	AC	7m4	12m8	31.6"	170°	2018
	BD	7m5	12m1	94.0"	43°	2018

Robert Zebahl
152mm f/5.9, 22x, Bortle 6, SQM-L 19.6 AB: 2020-06-24: Widely separated, small difference in brightness and beautiful color contrast: subtle orange and white-bluish.