- Double Stars (Del) -

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)

NGC 6933 (**)

../dss/dss2blue_203338.50_+072325.00_5_web.jpg
Image source: DSS II (blue) - 5×5'
Name: NGC6933
Type: **
Constellation: Del
Coordinates: 20h33m38.50s / +07°23'25.00"

Components:
m1 m2 ρ θ Year
10m8 12m5 30.0" 215.0° -
I guess it is just an optical double star. At least I could not find any entry in the 'Washington Double Star Catalog' (WDS). Located west of the globular cluster NGC6935 in an angular distance of less than 10 arcminutes.

Robert Zebahl
8" f/6, 80x, Bortle 4, NELM 5m7+, SQM-L 20.9
Conditions in the target region: NELM 5m4+, SQM-L 20.6
Easily split, but rather unspectacular. Just for completeness ;-)
EASY

STF 2664 (**)

Name: STF2664
Type: **
Constellation: Del
Coordinates: 20h19m38.48s / +13°00'17.20"

Components:
m1 m2 ρ θ Year
8m1 8m3 27.8" 322° 2019
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-08-19: Well separated with a clear, but not too wide separation. Slightly different in color, with the southern component appearing slightly cooler. Beautiful surrounding field.

STF 2690 (**)

Name: STF2690
Type: **
Constellation: Del
Coordinates: 20h31m11.94s / +11°15'33.70"

Components:
m1 m2 ρ θ Year
A-BC 7m1 7m4 17.8" 255° 2019
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-08-19: Striking, moderately bright with nice separation of the similarly bright components in nice environment. The eastern component seemed slightly brighter and colorwise cooler.

8" f/6, 37x, Bortle 4, NELM 5m7+, SQM-L 20.9
Conditions in the target region: NELM 5m4+, SQM-L 20.6
Evident double star with almost equally bright components and no noticeable contrast in color.

STF 2703 (**)

Name: STF2703
Type: **
Constellation: Del
Coordinates: 20h36m49.41s / +14°43'42.40"

Components:
m1 m2 ρ θ Year
AB 8m3 8m4 25.0" 289° 2017
AC 8m3 8m8 77.8" 234° 2016
AD 8m3 12m8 84.7" 347° 2016
BC 8m4 8m8 67.0" 215° 2016
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-08-19: Immediately eye-catching multiple star located between beta and zeta Delphini. Components A, B & C are very easily seen as a triple system forming a striking triangle. A very slight difference in brightness between A & B is perceptible, as well as a color difference, though I cannot name any colors. Very nice.