Double Star Marathon Observing List by: Glenn Chaple, 2016 R.A. (2000) Dec.

Double Star Marathon Observing List by: Glenn Chaple, 2016 Num Object Con SAO # R.A. (2000) Dec. PSA Mags. Sep ( ) PA ( ) Notes Time Eyepiece/Comments h m deg min 7 gamma And AND 037734 02 03.9 +42 20 2.3, 5.5 9.8 63 Almaak 2 44 zeta1 Ant ANT 200445 09 30.8-31 53 6.1, 6.8 8.1 212 39 98 57 Aql AQL 143898 19 54.6-08 14 5.8, 6.5 36.0 170 east of GC Pal 11 66 5 gamma Ari ARI 092680 01 53.5 +19 18 4.8, 4.8 7.8 0 Mesarthim 4 6 lambda Ari ARI 075051 01 57.9 +23 36 4.9, 7.7 37.7 46 4 58 kappa Boo BOO 029045 14 13.5 +51 47 4.6, 6.6 13.4 236 Asellus Tertius 42 59 iota Boo BOO 029071 14 16.2 +51 22 4.9, 7.5 38.0 33 42 60 STF 1835 BOO 120426 14 23.4 +08 27 5.0, 6.8 6.2 194 HR 5386 44 61 pi Boo BOO 101138 14 40.7 +16 25 4.9, 5.8 5.6 108 44 62 epsilon Boo BOO 083500 14 45.0 +27 04 2.5, 4.9 2.8 339 Izar 44 63 xi Boo BOO 101250 14 51.4 +19 06 4.7, 7.0 6.9 332 44 64 delta Boo BOO 064589 15 15.5 +33 19 3.5, 8.7 105.0 79 53 65 mu1, mu2 Boo BOO 064687 15 24.5 +37 23 4.3, 7.0 108.0 171 Alkalurops/mu2 is 2" dbl 53 13 STF 485 CAM 013030 04 07.8 +62 20 6.9, 6.9 17.7 305 HR 1260/in OC NGC 1502 11 16 1 Cam CAM 024672 04 32.0 +53 55 5.7, 6.8 10.3 308 near DN B12 12 54 32 Cam CAM 002102 12 49.2 +83 25 5.3, 5.8 21.6 HR 4893 / STF1694 326 NE of PN IC3568 41 1 STF 3053 CAS 010938 00 02.6 +66 06 6.0, 7.2 15.0 70 HR 9094 1 2 alpha Cas CAS 021609 00 40.5 +56 32 2.4, 9.0 69.5 282 Shedir 3 3 eta Cas CAS 021732 00 49.1 +57 49 3.4, 7.5 12.0 307 Achird 3 4 STF 163 CAS 012006 01 51.3 +64 51 6.8, 9.1 33.9 36 HD 11092 1 110 sigma Cas CAS 035947 23 59.0 +55 45 5.0, 7.1 3.0 326 72 57 3 Cen CEN 204916 13 51.8-33 00 4.5, 6.0 7.9 106 east of 1 Cen 48 100 kappa Cep CEP 009665 20 08.9 +77 43 4.4, 8.3 7.2 120 71 103 beta Cep CEP 010057 21 28.7 +70 34 3.2, 7.9 13.3 249 Alfirk 71 104 STF 2816 CEP 033626 21 39.0 +57 29 5.6, 7.7 11.7 121 HR 8281/at center of 5.6, 7.8 20.0 339 OC in nebula IC 1396 73 105 STF 2819 CEP 033626 21 40.4 +57 35 7.4, 8.6 12.7 59 HD 206482/E of STF 2816 73 107 xi Cep CEP 019827 22 03.8 +64 38 4.4, 6.5 7.7 277 Kurhah 71 108 delta Cep CEP 034508 22 29.2 +58 25 3.9, 6.3 41.0 192 71 34 h3945 CMa CMA 173349 07 16.6-23 19 5.0, 5.8 26.8 52 HR 2764 27

Num Object Con SAO # R.A. (2000) Dec. Mags. h m deg min Notes Time PSA Eyepiece/Comments 40 zeta Cnc CNC 097645 08 12.2 +17 39 5.1, 6.2 5.9 72 Tegmen/A is a 1.2" dbl 24 41 phi2 Cnc CNC 080187 08 26.8 +26 56 6.2, 6.2 5.2 218 24 42 iota Cnc CNC 080415 08 46.7 +28 46 4.2, 6.6 30.0 307 24 49 24 Com COM 100160 12 35.1 +18 23 5.2, 6.7 20.3 271 45 67 zeta CrB CRB 064834 15 39.4 +36 38 5.1, 6.0 6.3 305 53 73 sigma CrB CRB 065165 16 14.7 +33 52 5.6, 6.6 6.2 233 53 48 delta Crv CRV 157323 12 29.9-16 31 3.0, 9.2 24.2 214 Algorab 47 50 STF 1659 CRV 157384 12 35.7-12 01 8.0, 8.3 27.5 352 HD 109556 / Stargate 47 52 STF 1669 CRV 157448 12 41.3-13 01 5.9, 5.9 5.3 312 HR 4821 47 55 alpha CVn CVN 063256 12 56.0 +38 19 2.9, 5.5 19.4 229 Cor Caroli 43 96 beta Cyg CYG 087301 19 30.7 +27 58 3.1, 5.1 34.4 54 Alberio 64 97 16 Cyg CYG 031899 19 41.8 +50 32 6.0, 6.2 39.1 134 62 99 h1470 CYG 069335 20 03.7 +38 20 7.4, 9.2 28.6 340 HD 190466/W of Basel 6 62 102 61 Cyg CYG 070919 21 06.9 +38 45 5.2, 6.0 28.0 146 Piazzi's Flying Star 73 101 gamma Del DEL 106475 20 46.7 +16 07 4.5, 5.5 9.6 268 64 74 16, 17 Dra DRA 030013 16 36.2 +52 55 5.4, 6.4 3.4 108 17 Dra 5.4, 5.5 90.0 194 16 Dra 52 75 mu Dra DRA 030239 17 05.3 +54 28 5.7, 5.7 2.0 42 Arrakis 52 81 nu Dra DRA 030447 17 32.2 +55 11 4.9, 4.9 62.0 312 Kuma 52 82 psi Dra DRA 008890 17 41.9 +72 09 4.9, 6.1 30.3 15 Dsiban 51 84 40, 41 Dra DRA 008994 18 00.2 +80 00 5.7, 6.1 19.3 232 SE of epsilon UMi 61 12 32 Eri ERI 130805 03 54.3-02 57 4.8, 6.1 6.8 347 17 14 omi2 Eri ERI 131063 04 15.3-07 39 4.4, 9.7 83.0 104 Keid 17 17 55 Eri ERI 131442 04 43.6-08 48 6.7, 6.8 9.2 317 west of Rigel 16 33 38 Gem GEM 096265 06 54.6 +13 11 4.7, 7.8 7.3 326 25 36 alpha Gem GEM 060198 07 34.6 +31 53 1.9, 2.9 2.2 171 Castor 23 71 kappa Her HER 101951 16 08.1 +17 03 5.3, 6.5 28.0 12 Marfik 55 76 alpha Her HER 102680 17 14.6 +14 23 3.5, 5.4 4.7 107 Rasalgethi 54 77 delta Her HER 084951 17 15.0 +24 50 3.1, 8.2 8.9 236 Sarin 54 80 rho Her HER 066000 17 23.7 +37 09 4.6, 5.6 4.1 316 52 85 95 Her HER 085648 18 01.5 +21 36 5.0, 5.1 6.3 258 65 87 100 Her HER 085753 18 07.8 +26 06 5.8, 5.8 14.2 183 south of omicron Her 65 47 N Hya HYA 179967 11 32.3-29 16 5.8, 5.9 9.2 210 HR 4443 / H(3) 96 36

Num Object Con SAO # R.A. (2000) Dec. Mags. h m deg min Notes Time PSA Eyepiece/Comments 109 8 Lac LAC 072509 22 35.9 +39 38 5.7, 6.5 22.4 186 72 45 gamma Leo LEO 081298 10 20.0 +19 51 2.2, 3.5 4.4 122 Algieba 35 46 54 Leo LEO 081583 10 55.6 +24 45 4.5, 6.3 6.5 110 34 28 gamma Lep LEP 170759 05 44.5-22 27 3.7, 6.3 96.0 350 16 32 12 Lyn LYN 025939 06 46.2 +59 27 5.4, 7.3 8.7 308 A is a close 1.7" dbl 23 35 19 Lyn LYN 026311 07 22.9 +55 17 5.6, 6.5 14.8 315 bright DS east of R 23 43 38 Lyn LYN 061391 09 18.8 +36 48 3.9, 6.6 2.7 229 22 89 epsilon2 Lyr LYR 067315 18 44.3 +39 37 5.3, 5.4 2.4 82 Double Double 3.5'sep 63 88 epsilon1 Lyr LYR 067310 18 44.3 +39 40 5.0, 6.1 2.1 352 Double Double 3.5'sep 63 90 zeta Lyr LYR 067321 18 44.8 +37 36 4.3, 5.9 44.0 150 63 91 beta Lyr LYR 067451 18 50.1 +33 22 3.4, 8.6 46.0 149 Sheliak 63 92 SHJ 282 LYR 067566 18 54.9 +33 58 6.0, 7.7 45.0 350 STT 525 / HR 7140 63 94 STF 2470 LYR 067870 19 08.8 +34 46 7.0, 8.4 13.6 268 HD 178849 63 95 STF 2474 LYR 067879 19 09.1 +34 36 6.8, 7.9 15.8 262 HR 7272 63 30 epsilon Mon MON 113810 06 23.8 +04 36 4.5, 6.5 13.4 27 8 Mon 25 31 beta Mon MON 133316 06 28.8-07 02 4.6, 5.0 7.1 133 5.0, 5.3 2.9 108 27 78 36 Oph OPH 185199 17 15.3-26 36 5.1, 5.1 4.4 154 56 79 omicron Oph OPH 185238 17 18.0-24 17 5.4, 6.9 10.3 355 56 86 70 Oph OPH 123107 18 05.5 +02 30 4.2, 6.0 2.8 72 65 18 rho Orionis ORI 112528 05 13.3 +02 52 4.6, 8.5 7.1 64 14 19 beta Ori ORI 131907 05 14.5-08 12 0.1, 6.8 9.5 202 Rigel 16 21 delta Ori ORI 132221 05 32.0-00 18 2.2, 6.3 52.6 359 Minitaka 16 22 STF 747 ORI 132298 05 35.0-06 00 4.8, 5.7 35.7 223 HR 1887 - Det B / D7 16 23 lambda Ori ORI 112921 05 35.1 +09 56 3.6, 5.5 4.4 43 Meissa 14 24 theta1 Ori ORI 132314 05 35.3-05 23 6.7, 7.9 8.8 31 Trapezium in M42 6.7, 5.1 13.0 312 see PSA Det B, idsa D7 6.7, 6.7 21.5 96 16 25 iota Ori ORI 132323 05 35.4-05 55 2.8, 6.9 11.3 141 Nair al Saif - Det B / D7 16 27 sigma Ori ORI 132406 05 38.7-02 36 4.0, 7.5 12.9 84 4.0, 6.5 43.0 61 16 29 STF 817 ORI 113266 05 54.9 +07 02 8.7, 8.9 18.8 73 HD39758/S alpha Ori 14 not 106 epsilon Peg PEG 127029 21 44.2 +09 52 2.4, 8.4 142 320 Enif 75 10 eta Per PER 023655 02 50.7 +55 54 3.8, 8.5 28.3 300 Miram & a 9.9* @ 66" 2

Num Object Con SAO # R.A. (2000) Dec. Mags. h m deg min Notes Time PSA Eyepiece/Comments 11 STF 331 PER 023763 03 00.9 +52 21 5.3, 6.7 12.1 85 HR 890 13 37 STF 1121 PUP 153142 07 36.6-14 29 7.0, 7.3 7.4 305 HD 60997/mid OC M47 27 38 kappa Pup PUP 174199 07 38.8-26 48 4.5, 4.7 9.9 HR 2949 / H(3) 27 318 NW 1 & 3 Pup 27 39 2 Pup PUP 153363 07 45.5-14 41 6.0, 6.7 16.6 340 near 4 Pup 26 69 xi Sco SCO 159665 16 04.4-11 22 4.8, 7.3 7.6 51 56 70 beta Sco SCO 159682 16 05.4-19 48 2.6, 4.9 13.6 21 Graffias 57 72 nu Sco SCO 159763 16 12.0-19 28 4.3, 6.4 41.0 337 Jabbah 57 66 delta Ser SER 101623 15 34.8 +10 32 4.2, 5.2 3.9 178 55 68 beta Ser SER 101725 15 46.2 +15 25 3.7, 10.0 30.9 264 55 93 theta Ser SER 124068 18 56.2 +04 12 4.5, 5.4 22.3 104 Alya 65 83 PZ4 (h5003) SGR 209553 17 59.1-30 15 5.4, 7.0 5.8 HR 6693/also as PZ 6 107 W of gamma Sgr 67 15 chi Tau TAU 076573 04 22.6 +25 38 5.5, 7.6 19.4 24 15 20 118 Tau TAU 077201 05 29.3 +25 09 5.8, 6.6 4.8 204 14 26 STF 742 TAU 077313 05 36.4 +22 00 7.1, 7.5 4.0 274 HD 37013/E of M1/Crab 14 8 iota Tri TRI 055347 02 12.4 +30 18 5.3, 6.9 3.9 71 6 Tri 2 56 zeta UMa UMA 028737 13 23.9 +54 56 2.3, 4.0 14.4 152 Mizar; Alcor @ 12' 43 9 alpha UMi UMI 000308 02 31.8 +89 16 2.0, 9.0 18.4 218 Polaris 1 51 STF 1664 VIR 157411 12 38.3-11 31 7.8, 9.2 37.2 224 HD 109875/WNW of M104 47 53 gamma Vir VIR 138917 12 41.7-01 27 3.5, 3.5 3.6 293 Porrima 47

Num Object 7 gamma And 44 zeta1 Ant 98 57 Aql 5 gamma Ari 6 lambda Ari 58 kappa Boo 59 iota Boo 60 STF 1835 61 pi Boo 62 epsilon Boo 63 xi Boo 64 delta Boo 65 mu1, mu2 Boo 13 STF 485 16 1 Cam 54 32 Cam 1 STF 3053 2 alpha Cas 3 eta Cas 4 STF 163 110 sigma Cas 57 3 Cen 100 kappa Cep 103 beta Cep 104 STF 2816 105 STF 2819 107 xi Cep 108 delta Cep 34 h3945 CMa Chart References by: Jim K, 2017 CDSA 1 st CDSA idsa TriAtlas "B" Taki 2 nd 6 6 27, 26 B25, 24 18, 17 22 22 83 B75 26, 25 19, 18 19, 18 54, 66 B48 21, 20 7, 6 7, 6 51, 50 B43, 44 17, 18 7, 6 7, 6 32, 39 B43, 44 17, 18 4 4 20, 11 B16, 17 3, 11 4 4 20, 11 B16, 17 3, 11 10, 17 10, 17 44, 56 B53 11 10, 17 10, 17 44 B33 11 10 10 32 B33 11 10, 17 10, 17 44 B33 11 10 10 32 B33 11 10 10 20, 32 B33 11 3 3 14 B23, 24 6, 5 3 3 14, 25 B23 5 1 1 1, 4 B5, 3-7 6 2 2 15, 7 B1 6, 1 2 2 15 B25, 11 6 2 2 15 B25, 11 6 2 2 15 B24, 9 6 2 2 15, 8 B10 6, 7, 18 23, 24 23, 24 81, 80 B72 24, 23 1 1 2 B2, 1 1, 1-6 2, 1 2, 1 2 B2 1, 1-6 2 2 8 B11, 12 1 2 2 8 B11, 12 1 not 2 2 8 B2, 12 1 2 2 8 B11 1 22 22 84, 72 B77 27

Num Object 40 zeta Cnc 41 phi2 Cnc 42 iota Cnc 49 24 Com 67 zeta CrB 73 sigma CrB 48 delta Crv 50 STF 1659 52 STF 1669 55 alpha CVn 96 beta Cyg 97 16 Cyg 99 h1470 102 61 Cyg 101 gamma Del 74 16, 17 Dra 75 mu Dra 81 nu Dra 82 psi Dra 84 40, 41 Dra 12 32 Eri 14 omi2 Eri 17 55 Eri 33 38 Gem 36 alpha Gem 71 kappa Her 76 alpha Her 77 delta Her 80 rho Her 85 95 Her 87 100 Her 47 N Hya CDSA 1 st CDSA idsa TriAtlas "B" Taki 2 nd 8 8 47 B38, 39 14, 15 8 8 35 B38 14, 15 8 8 35 B38 14 9 9 45 B35 12 10 10 32, 20 B33, 32 11, 10 10 10 31 B32 11, 10 16, 23 16, 23 69 B73 24 16, 23 16, 23 69 B54, 73 24 not 16, 23 16, 23 69 B54, 73 24 not 9 9 21, 33 B17, 18 12 11 11 30 B29, 30 9 5, 11 5, 11 18 B13 8, 2 11, 2 11, 2 13, 17 B29 8 not 11 11 17, 29 B12, 28 9 19, 11 19, 11 41 B29, 28 8 5 5 10, 14 B15 16 5 5 10 B14, 15 16 5 5 10 B14, 15 16 5 5 3 B3, 4 2, 1-4, 6 1 1 3 B3, 1-4 2, 1-6 13 13 62 B61 28, 29 14 14 61, 73 B61 28, 29 14, 13 14, 13 61, 73 B60 28 8, 14 8, 14 48 B40, 39, 58, 59 15 8 8 36 B39 15, 14 10, 17, 18 10, 17, 18 43 B32 10, 11 10, 18 10, 18 43 B31 10 10 10 31 B31 10 10 10 31, 19 B31, 14, 15 10 10, 11 10, 11 31, 30, 42, 43 B31 10, 9 10, 11 10, 11 31, 30 B31 10, 9 23 23 82 B74 25

Num Object 109 8 Lac 45 gamma Leo 46 54 Leo 28 gamma Lep 32 12 Lyn 35 19 Lyn 43 38 Lyn 89 epsilon2 Lyr 88 epsilon1 Lyr 90 zeta Lyr 91 beta Lyr 92 SHJ 282 94 STF 2470 95 STF 2474 30 epsilon Mon 31 beta Mon 78 36 Oph 79 omicron Oph 86 70 Oph 18 rho Orionis 19 beta Ori 21 delta Ori 22 STF 747 23 lambda Ori 24 theta1 Ori 25 iota Ori 27 sigma Ori 29 STF 817 106 epsilon Peg 10 eta Per CDSA 1 st CDSA idsa TriAtlas "B" Taki 2 nd 2, 6 2, 6 16 B11, 27 7, 8 9, 15, 16 9, 15, 16 46 B37 13, 14 9 9 34 B36, 37 13 21 21 73, 85 B79, 78 28, 27 3 3 13 B21 5 3 3 13 B21 5 8 8 23, 35 B20, 38 14 11 11 18 B30, 13, 14 9 11 11 18 B30, 13, 14 9 11 11 30, 18 B30, 13, 14 9 11 11 30 B30 9 11 11 30 B30 9 11 11 30 B30 9 not 11 11 30 B30 9 14 14 60 B59 15, 27 14 14 60, 72 B59 27 24 24 79 B69 22 24 24 79 B69 22 18 18 54 B50 10, 9, 21, 22 14 14 61 B60 16, 28 14 14 61, 73 B60 28 14 14 61 B60 28, 16 14 14 61, D7 B60, 59 28 14 14 49 B60, 59 16 14 14 61, D7 B60, 59 28 14 14 61, D7 B60, 59 28 14 14 61 B60, 59 28, 16 14 not 14 not 61, 49 B59 16 not 11, 19 11, 19 53 B47 8, 7 2, 3 2, 3 15, 14 B24 6, 17

Num Object 11 STF 331 37 STF 1121 38 kappa Pup 39 2 Pup 69 xi Sco 70 beta Sco 72 nu Sco 66 delta Ser 68 beta Ser 93 theta Ser 83 PZ4 (h5003) 15 chi Tau 20 118 Tau 26 STF 742 8 iota Tri 56 zeta UMa 9 alpha UMi 51 STF 1664 53 gamma Vir CDSA 1 st CDSA idsa TriAtlas "B" Taki 2 nd 2, 3 2, 3 15, 14 B24 6, 17 22, 14, 15 22 72 B77 27 not 22 22 84 B77 27 22, 14, 15 22, 14, 15 84, 72 B77 27 24, 17, 18 24, 17, 18 67, 68 B70 22, 23 24, 17, 18 24, 17, 18 67, 68 B70 22, 23 24, 17, 18 24, 17, 18 67 B70 22, 23 17, 10 17, 10 44 B52 11 17, 10 17, 10 44 B32, 33 11, 10 18 18 54 B49 9, 21 25 25 78, 79 B69 22, 21 7 7 37 B42, 41 16 7 7 37 B41 16 7 7 49, 37 B41, 40 16 not 7, 6 7, 6 38 B43 17, 18 4 4 11 B17 3 1 1 1 B4, 1-9 1 16, 23 16, 23 69 B54, 73 24 16 16 57 B54 12, 24

References: commercial Astronomy magazine, March 2016, article by Glenn Chaple (listing obtained separately) PSA commercial Sky & Telescope's "Pocket Sky Atlas" by R.W. Sinnott, 2006 CDST 1 st commercial "The Cambridge Double Star Atlas" by J. Mullaney & W.Tirion, 1st edition, 2009 (now out of print) CDST 2 nd commercial "The Cambridge Double Star Atlas" by B. MacEvoy & W.Tirion, 2nd edition, 2015 idsa commercial "interstellarum Deep Sky Atlas" by R. Stoyan & S. Schurig, 2014 TriAtlas "B" "free" "Tri-Atlas" by J.R. Tores Lapasio, "B" size, 2nd edition, April 2008 available at ==> www.uv.es/jrtorres/triatlas.html Taki "free" "Atlas of Double Stars" by T. Taki & P. Wehner, September 2007 commercial available at ==> www.geocities.jp/toshimi_taki/atlas_dbl_star/dbl_star_atlas.htm "Sky Tools 3" software by G. Crinklaw (for HR and HD star numbers, and object confirmations) Comments: No commonly available paper atlas identifies 100% of the double stars on this list. Preparation is KEY to completing this marathon, which only allows ~5 minutes per object over ~9 observing hours. The PSA may be the best field tool for performing the marathon, after first using the other references to annotate the PSA. BOLD ITALIC chart numbers with a left alignment/justification are those where objects are plotted but not labeled. BOLD chart numbers with a "not" after them indicate objects which are not included in the atlas. The "Notes" column provides other identification for the object; some charts use this nomenclature. If the object appears on several charts, the first one listed offers a "best" chart view. Minor edits to the original listing (for better spacing) and chart cross-references added by Jim K (28 March 2017)