- Double Stars (Dra) -

And (13) Cep (11) Cyg (11) LMi (4) Per (3) UMi (1)
Aql (9) CMa (1) Del (2) Lyn (9) Psc (1) Vir (6)
Ari (5) Cnc (2) Dra (8) Lyr (6) Ser (3)
Aur (15) Com (1) Eri (1) Mon (1) Sex (1)
Boo (8) CrB (4) Gem (9) Oph (1) Tau (6)
Cam (2) Crv (1) Her (12) Ori (8) Tri (3)
Cas (11) CVn (2) Leo (11) Peg (4) UMa (5)

16/17 Dra (**)

Name: 16/17 Dra
Type: **
Constellation: Dra
Coordinates: 16h36m13.72s / +52°55'27.80"

Components:
m1 m2 ρ θ Year
STFA30, 16/17 Dra AC 5.4 5.5 90.0" 193° 2017
STF2078, 17 Dra AB 5.4 6.4 3.3" 104° 2018
55mm f/9.1, 27x
STFA30 (AC): Rather wide pair with almost equal components. C component appeared slightly yellowish-orange.

55mm f/9.1, 71x
STF2078 (AB): Grand sight!

../sketches/2019-05-18_16_17_dra.jpg

mu Dra (**)

Name: mu Dra, 21 Dra, Alrakis, Arrakis
Type: **
Constellation: Dra
Coordinates: 17h05m20.20s / +54°28'14.30"

Components:
m1 m2 ρ θ Year
STF2130 AB 5.7 5.7 2.6" 2018
BU1088 AC 5.7 13.7 12.6" 175° 2006
102mm f/11, 125x, Bortle 6
AB: Easy to separate. Beautiful sight. Components equally bright with no discernible colour difference.

STF1626 (**)

Name: STF1626
Type: **
Constellation: Dra
Coordinates: 12h16m47.11s / +70°08'45.70"

Components:
m1 m2 ρ θ Year
9.4 9.6 2.1" 2017
120mm f/5, 150x, Bortle 6, NELM 5.0+, SQM-L 19.3
Components similar in brightness, pretty faint, close together, but clearly split.

STF2054 (**)

Name: STF2054
Type: **
Constellation: Dra
Coordinates: 16h23m47.19s / +61°41'47.00"

Components:
m1 m2 ρ θ Year
AB 6.2 7.1 0.9" 351° 2018
70mm f/5.7, 133x, Bortle 4, SQM-L 20.9
Not split in any way.

102mm f/11, 160x, Bortle 6, SQM-L 19.4
Immediately visible as a double star. The diffraction disks overlapped slightly. The difference in brightness was clearly visible. Together with the nearby double star eta Dra in the same field of view, the sight was highly fascinating, as both double stars are very different in their appearance.

../sketches/2019-06-25_stf2054.jpg

STF2308 (**)

Name: STF2308
Type: **
Constellation: Dra
Coordinates: 18h00m09.07s / +80°00'13.70"

Components:
m1 m2 ρ θ Year
40/41 Dra AB 5.7 6.0 18.7" 232° 2018
AC 5.7 8.3 224.8" 129° 2004
102mm f/11, 28x
Very nice, slightly uneven pair. Components appeared yellowish-white. Beautiful surroundings. On the sketch the components A, B and C are visible.

../sketches/2019-06-30_40_41_dra.jpg

STF2323 (**)

Name: STF2323, 39 Dra
Type: **
Constellation: Dra
Coordinates: 18h23m54.65s / +58°48'02.10"

Components:
m1 m2 ρ θ Year
AC 5.1 8.0 89.1" 19° 2017
AB 5.1 8.1 3.8" 348° 2018
55mm f/9.1, 27x
AC: Pretty wide, unequal pair. Die brighter A component appeared white.

55mm f/9.1, 71x
AB: Very nice. The B component seemed to be comparable faint as the C component.

../sketches/2019-05-18_39_dra.jpg

STFA35 (**)

Name: STFA35, nu 1/2 Dra, 24/25 Dra
Type: **
Constellation: Dra
Coordinates: 17h32m15.88s / +55°10'22.10"

Components:
m1 m2 ρ θ Year
4.9 4.9 62.1" 311° 2017
102mm f/11, 28x
Wide, bright, equal pair. Both components looked cream-white. Due to the distance a double for binoculars.

STT312 (**)

Name: STT312, eta Dra, 14 Dra
Type: **
Constellation: Dra
Coordinates: 16h23m59.51s / +61°30'50.70"

Components:
m1 m2 ρ θ Year
AB 2.8 8.2 4.4" 143° 2015
70mm f/5.7, 133x, Bortle 4, SQM-L 20.9
Not split in any way.

102mm f/11, 160x, Bortle 6, SQM-L 19.4
Easy. Very large difference in brightness. The faint companion appeared as a tiny star outside the first diffraction ring of the primary component. Highly recommended, especially with the nearby double star STF 2054!

../sketches/2019-06-25_eta_dra.jpg