- Double Stars (Lyr) -

And (30) Cep (13) Cyg (18) Leo (11) Peg (9) UMa (5)
Aql (9) CMa (1) Del (2) LMi (4) Per (4) UMi (1)
Ari (5) Cnc (2) Dra (8) Lyn (9) Psc (1) Vir (6)
Aur (15) Com (1) Equ (5) Lyr (8) Ser (3)
Boo (8) CrB (4) Eri (1) Mon (1) Sex (1)
Cam (2) Crv (1) Gem (9) Oph (1) Tau (6)
Cas (17) CVn (2) Her (12) Ori (8) Tri (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 3.6 6.7 45.7" 149° 2017
BU293 AE 3.6 10.1 67.2" 317° 2015
BU293 AF 3.6 10.6 86.0" 18° 2015
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.

../sketches/2019-06-23_beta_lyr.jpg

epsilon Lyr (**)

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

Components:
m1 m2 ρ θ Year
STFA37 AB-CD 4.7 4.6 209.5" 172° 2016
STFA37 AI 5.2 10.1 149.5" 137° 2015
STF2382, 4 Lyr, epsilon 1 Lyr AB 5.2 6.1 2.2" 346° 2018
STF2383, 5 Lyr, epsilon 2 Lyr CD 5.2 5.4 2.4" 76° 2018
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!

../sketches/2019-06-26_epsilon_lyr.jpg

SHJ282 (**)

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

Components:
m1 m2 ρ θ Year
AC 6.1 7.6 45.4" 350° 2018
70mm f/5.7, 22x, Bortle 6-, SQM-L 19.2
Fairly bright and wide pair. The double star was conspicuous, especially in regard to its color: A appeared orange, C rather gray-bluish. It could be observed together with Messier 57 and beta & gamma Lyrae. Very nice.

STF2349 (**)

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

Components:
m1 m2 ρ θ Year
AB 5.4 9.4 7.2" 204° 2016
102mm f/11, 125x, Bortle 6
Easy to split with a clear difference in brightness. The companion only appeared as a tiny star.

../sketches/2019-06-23_stf2349.jpg

STF2351 (**)

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

Components:
m1 m2 ρ θ Year
7.6 7.6 5.1" 160° 2017
70mm f/5.7, 57x
Beautiful, little double star with equally bright components at a moderate distance.

STF2461 (**)

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

Components:
m1 m2 ρ θ Year
AB 5.3 9.1 3.2" 281° 2017
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.

STF2470 (**)

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

Components:
m1 m2 ρ θ Year
7.0 8.4 13.8" 267° 2017
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.

STF2474 (**)

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

Components:
m1 m2 ρ θ Year
AB 6.8 7.9 15.9" 264° 2018
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.

../sketches/2019-06-26_stf2470_stf2474.jpg