Catalogues

Camelopardalis / New General & Index Catalogue (NGC/IC)

Planetary Nebulae

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Name RA Dec Type bMag vMag Dim MD Dreyer Description Identification, Remarks
NGC 1501 04 06 59.4 +60 55 17 PN 13.3 11.5 0.87 1.763 planetary, pB, pS, vlE, 1' diam PK 144+6.1; CS=14.4
IC 3568 12 33 06.9 +82 33 51 PN 11.6 10.6 0.17 2.728 Planetary or neb * 9.5, * 13 p 15" PK 123+34.1; UGC 7731; CS=11.4

Open Clusters

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Name RA Dec Type vMag Dim MD Dreyer Description Identification, Remarks
NGC 1502 04 07 49.2 +62 19 54 OCL (II3p) 6.9 20 0.821 Cl, pRi, cC, iF OCL 383
NGC 1708 05 03 27.0 +52 50 00 OCL 20 0.600 Cl, vL, pRi, lC, st L and S
IC 361 04 18 50.6 +58 14 58 OCL (II1r) 11.7 7 3.220 F, L, ? neb Cl OCL 393

Galaxies

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Name RA Dec Type bMag vMag B-V SB Dim PA z D(z) MD Dreyer Description Identification, Remarks
NGC 1469 04 00 27.8 +68 34 39 Gx (E-S0) 13.7 12.7 1.0 13.0 1.9 × 0.8 153 0.003676 15.53 vF, vS, R, B * nr UGC 2909; MCG 11-5-4; CGCG 305-3
NGC 1485 04 05 03.4 +70 59 48 Gx (Sb) 13.4 12.6 0.8 12.9 2.1 × 0.7 22 0.003633 15.35 eF, pS, R UGC 2933; MCG 12-4-10; CGCG 327-14; IRAS 03598+7051
NGC 1530 04 23 26.9 +75 17 40 Gx (SBb) 12.3 11.5 0.8 13.9 4.4 × 2.5 24 0.008209 34.67 23.200 pB, L UGC 3013; MCG 13-4-4; CGCG 327-17; IRAS 04170+7510; KUG 0417+751; 7ZW 12; KARA 147; CGCG 347-4
NGC 1560 04 32 47.5 +71 52 46 Gx (Scd) 12.2 11.4 0.8 14.4 9.8 × 1.5 23 -0.000120 3.280 vF, L, E, * 9.3 sp UGC 3060; MCG 12-5-5; CGCG 328-6; FGC 71A
NGC 1569 04 30 49.1 +64 50 53 Gx (IBm) 11.9 11.0 0.9 12.9 3.7 × 1.8 120 -0.000347 2.900 pB, S, lE, bNM, * 9.5 n 1' UGC 3056; MCG 11-6-1; CGCG 306-1; Arp 210; 7ZW 16; IRAS 04260+6444
NGC 1573 04 35 04.2 +73 15 47 Gx (E3) 12.8 11.7 1.1 12.6 1.9 × 1.3 35 0.014080 59.47 55.150 vF, S, * 9.5 f UGC 3077; MCG 12-5-8; CGCG 328-9; 7ZW 18
NGC 1573 A 04 48 26.7 +73 28 10 Gx (SBbc) 14.8 14.0 0.8 14.6 1.6 × 1.3 165 0.015014 63.42 vF, S, * 9.5 f UGC 3150; MCG 12-5-20; CGCG 328-21; IRAS 04423+7322
NGC 1961 05 42 03.9 +69 22 43 Gx (SBbc) 11.7 11.0 0.7 13.7 4.5 × 3.1 85 0.013122 55.43 cF, pL, iF, mbM, er, * inv (? PD) IC 2133; UGC 3334; MCG 12-6-7; IRAS 05365+6921; CGCG 329-8; Arp 184
NGC 2128 06 04 34.0 +57 37 39 Gx (E-S0) 13.6 12.6 1.0 13.2 1.5 × 1.1 60 0.010070 42.53 vF, vS, vlE UGC 3392; MCG 10-9-10; CGCG 284-6; IRAS 06002+5737
NGC 2146 06 18 38.3 +78 21 21 Gx (SBab/P) 11.4 10.6 0.8 13.7 5.4 × 2.9 123 0.002979 12.58 22.450 pB, 2' l, lE UGC 3429; MCG 13-5-22; CGCG 348-17; KCPG 110A; IRAS 06106+7822
NGC 2146 A 06 23 54.6 +78 31 48 Gx (SBc) 13.5 12.9 0.6 14.1 3 × 1.2 30 0.004983 21.05 21.700 pB, 2' l, lE UGC 3439; MCG 13-5-25; CGCG 348-19; IRAS 06155+7833; KUG 0615+785; KCPG 110B
NGC 2256 06 47 14.2 +74 14 13 Gx (E/SB0) 13.5 12.5 1.0 14.0 2.3 × 2 72 0.017519 74.00 F, R, * 9.5 3' sf UGC 3519; MCG 12-7-15; CGCG 330-14
NGC 2258 06 47 46.5 +74 28 53 Gx (S0) 13.0 11.9 1.1 13.1 2.3 × 1.5 150 0.013539 57.19 60.440 F, 2 st 10·11 f UGC 3523; MCG 12-7-16; CGCG 330-15
NGC 2268 07 14 17.5 +84 22 56 Gx (SBbc) 12.2 11.5 0.7 13.4 2.7 × 1.5 63 0.007412 31.31 34.020 pF, pL, lE UGC 3653; MCG 14-4-22; CGCG 362-36; CGCG 363-20; IRAS 07006+8427
NGC 2314 07 10 31.8 +75 19 40 Gx (E3) 13.2 12.2 1.0 13.2 1.1 × 0.8 25 0.012762 53.91 59.700 vF, S, R UGC 3677; MCG 13-6-3; CGCG 348-32
NGC 2336 07 27 03.6 +80 10 40 Gx (SBbc) 11.1 10.4 0.7 13.9 7.1 × 3.9 178 0.007352 31.05 32.700 pB, pL, R, 2 st 11 nr UGC 3809; MCG 13-6-6; CGCG 348-34; IRAS 07184+8016; CGCG 349-4; KCPG 132A
NGC 2336 A 07 56 15.1 +78 00 47 Gx (Sc) 14.4 13.7 0.7 14.7 1.7 × 1.7 0.007659 32.35 pB, pL, R, 2 st 11 nr UGC 4066; MCG 13-6-12; CGCG 349-11
NGC 2347 07 16 04.0 +64 42 41 Gx (Sb) 13.2 12.5 0.7 13.2 1.8 × 1.3 4 0.014747 62.29 83.750 vF, S, R, lbM UGC 3759; MCG 11-9-39; CGCG 309-26; IRAS 07112+6447; KCPG 128B; near SAO 14129
NGC 2366 07 28 54.8 +69 12 58 Gx (IBm) 11.5 11.1 0.4 14.5 8.1 × 3 25 0.000267 1.13 3.570 vF, pL, mbM, vS * inv, curved tails UGC 3851; MCG 12-7-40; DDO 42; IRAS 07233+6917; CGCG 330-38; MK 71; KCPG 133B
NGC 2403 07 36 50.6 +65 36 06 Gx (SBc) 8.9 8.5 0.4 14.4 23.4 × 11.8 127 0.000437 1.85 3.580 !! cB, eL, vmE, vgmbMN UGC 3918; MCG 11-10-7; CGCG 309-40; IRAS 07321+6543; KARA 197; CGCG 310-3
NGC 2441 07 51 54.5 +73 00 55 Gx (SBb) 13.0 12.2 0.8 13.4 2 × 1.8 45 0.011575 48.89 55.250 vF, pS UGC 4036; MCG 12-8-15; CGCG 331-17; IRAS 07460+7308
NGC 2460 07 56 52.8 +60 20 58 Gx (Sab) 12.7 11.8 0.9 13.3 2.5 × 1.9 40 0.004810 20.32 31.900 F, S, R, S * in centre UGC 4097; MCG 10-12-21; CGCG 287-10; IRAS 07525+6028
NGC 2523 08 15 00.0 +73 34 44 Gx (SBbc) 12.6 11.9 0.7 13.6 2.9 × 1.8 57 0.011578 48.90 38.400 pB, pL, lE, lbM, * nr UGC 4271; MCG 12-8-31; CGCG 331-32; Arp 9; IRAS 08092+7343
NGC 2523 A 08 04 08.4 +74 02 53 Gx (SBc) 14.5 13.8 0.7 13.3 1 × 0.7 95 0.012689 53.60 64.550 pB, pL, lE, lbM, * nr UGC 4166; MCG 12-8-24; CGCG 331-26; KUG 0758+741
NGC 2523 B 08 12 56.8 +73 33 49 Gx (Sb) 14.8 14.0 0.8 13.3 2 × 0.3 92 0.012786 54.01 pB, pL, lE, lbM, * nr UGC 4259; MCG 12-8-30; CGCG 331-30; IRAS 08072+7342
NGC 2523 C 08 17 44.2 +73 19 05 Gx (E5) 14.3 13.3 1.0 13.6 1.5 × 0.8 95 0.012038 50.85 pB, pL, lE, lbM, * nr UGC 4290; MCG 12-8-32; CGCG 331-33; NPM1G +73.0036
NGC 2544 08 21 40.3 +73 59 18 Gx (SBa) 13.8 12.9 0.9 12.6 1.1 × 0.8 70 0.009433 39.84 41.300 eeF, pS, R, sev B st around UGC 4327; MCG 12-8-34; MK 87; IRAS 08159+7409; KCPG 160A; KUG 0815+741; CGCG 331-36
NGC 2550 08 24 33.7 +74 00 43 Gx (Sb/P) 13.6 12.8 0.8 11.7 1 × 0.4 103 0.007579 32.01 36.700 eeF, pS, cE UGC 4359; MCG 12-8-37; CGCG 331-39; IRAS 08188+7410
NGC 2550 A 08 28 39.1 +73 44 53 Gx (Sc) 13.4 12.7 0.7 13.4 1.6 × 1.4 0 0.012145 51.30 eeF, pS, cE UGC 4397; MCG 12-8-43; CGCG 331-43; KUG 0823+739; IRAS 08230+7354
NGC 2551 08 24 50.2 +73 24 45 Gx (Sa) 13.1 12.1 1.0 12.7 1.6 × 1 55 0.007819 33.03 34.100 vF, S, F * in centre UGC 4362; MCG 12-8-38; CGCG 331-40; ARAK 162
NGC 2591 08 37 25.5 +78 01 32 Gx (Sc) 12.9 12.2 0.7 12.7 3 × 0.6 32 0.004413 18.64 20.560 F, S, E, lbM UGC 4472; MCG 13-7-1; CGCG 349-29; CGCG 350-1; IRAS 08307+7811
NGC 2633 08 48 04.6 +74 05 57 Gx (SBb/P) 12.9 12.2 0.7 13.6 2.3 × 1.5 175 0.007205 30.43 30.100 F, S, lE UGC 4574; MCG 12-9-13; VV 519; IRAS 08425+7416; CGCG 331-63; CGCG 332-10; CGCG 350-5; Arp 80; KCPG 169
NGC 2634 08 48 25.5 +73 58 02 Gx (E1) 12.9 12.0 0.9 13.1 1.7 × 1.6 51 0.007532 31.81 43.070 F, S, lE UGC 4581; MCG 12-9-15; CGCG 331-66; CGCG 332-13
NGC 2634 A 08 48 38.1 +73 56 19 Gx (SBbc) 14.3 13.5 0.8 13.0 1.8 × 0.4 73 0.006958 29.39 F, S, lE UGC 4585; MCG 12-9-16; CGCG 331-68; CGCG 332-15; IRAS 08433+7406
NGC 2636 08 48 24.4 +73 40 18 Gx (E0) 14.7 13.8 0.9 12.8 0.4 × 0.4 0.006911 29.19 vF, S, 2 st 11·12 f UGC 4583; CGCG 331-67; CGCG 332-14; NPM1G +73.0043
NGC 2646 08 50 21.8 +73 27 46 Gx (SB0) 13.1 12.1 1.0 12.5 1.3 × 1.3 0.012275 51.85 vF, S, 2 F st 2'.5 sf IC 511; UGC 4604; MCG 12-9-19; CGCG 332-19; ARAK 180; CGCG 331-69
NGC 2655 08 55 37.7 +78 13 25 Gx (SB0-a) 11.0 10.1 0.9 13.2 4.9 × 4.1 85 0.004670 19.73 24.400 vB, cL, lE 90°, gsvmbM UGC 4637; MCG 13-7-10; CGCG 349-33; IRAS 08491+7824; CGCG 350-7; Arp 225
NGC 2715 09 08 05.9 +78 05 09 Gx (SBc) 11.8 11.2 0.6 13.4 4.8 × 1.6 22 0.004466 18.86 20.400 pB, L, E UGC 4759; MCG 13-7-15; CGCG 350-12; IRAS 09018+7817
NGC 2732 09 13 25.0 +79 11 16 Gx (S0) 12.9 11.9 1.0 12.3 2.1 × 0.9 67 0.006538 27.62 31.800 pB, S, E 45°, * 13 nf UGC 4818; MCG 13-7-16; CGCG 350-13
NGC 2748 09 13 43.0 +76 28 33 Gx (Sbc) 12.4 11.7 0.7 12.9 3.1 × 1.1 38 0.004923 20.79 21.670 pB, pL, E, vglbM UGC 4825; MCG 13-7-19; CGCG 350-14; IRAS 09080+7640; PRC C-28
NGC 3901 11 42 49.2 +77 22 22 Gx (Sc) 14.4 13.7 0.7 13.9 1.8 × 0.8 165 0.005624 23.76 pF, pL, r, Place doubtful UGC 6675; MCG 13-9-1; CGCG 351-68; CGCG 352-6; KARA 496
NGC 4127 12 08 25.8 +76 48 16 Gx (Sc) 13.4 12.7 0.7 13.7 2.5 × 1.2 140 0.006061 25.60 31.890 F, pL, vlE, glbM UGC 7122; MCG 13-9-12; CGCG 352-19; IRAS 12060+7705
NGC 5295 13 38 39.3 +79 27 34 Gx (E-S0) 15.3 14.3 1.0 12.4 0.4 × 0.4 0.023133 97.71 vF, vS, R MCG 13-10-9; CGCG 353-23; NPM1G +79.0112
NGC 5640 14 20 40.7 +80 07 25 Gx (Sa) 15.6 14.7 0.9 13.4 0.9 × 0.4 24 0.047386 200.1 eF, S, lE CGCG 353-35; NPM1G +80.0106
IC 334 03 45 17.1 +76 38 15 Gx (I/P) 12.5 11.3 1.2 12.9 2.5 × 2.1 51 0.008459 35.73 37.300 pB, S, * 13 inv sf UGC 2824; MCG 13-3-7; CGCG 346-6
IC 342 03 46 48.4 +68 05 44 Gx (SBc) 9.1 8.4 0.7 14.9 21.4 × 20.9 168 0.000103 0.44 3.600 pB, vS, * 12 close n UGC 2847; MCG 11-5-3; CGCG 305-2; IRAS 03419+6756
IC 356 04 07 46.3 +69 48 43 Gx (Sb/P) 11.4 10.6 0.8 13.9 5.9 × 3.9 105 0.002985 12.61 18.900 pF, pL, bM, * 8.5 4' n UGC 2953; MCG 12-4-11; CGCG 327-15; Arp 213; IRAS 04025+6940
IC 381 04 44 28.4 +75 38 23 Gx (SBbc) 13.1 12.3 0.8 13.4 2.4 × 1.3 177 0.008259 34.89 31.210 F, S, bM, * 12 np UGC 3130; MCG 13-4-7; CGCG 347-6; IRAS 04378+7532
IC 391 04 57 22.1 +78 11 23 Gx (Sc/P) 13.0 12.7 0.3 12.8 1.1 × 1.1 0.005190 21.92 25.500 F, S, R UGC 3190; MCG 13-4-11; CGCG 347-9; IRAS 04497+7806; KARA 155; KUG 0449+781
IC 396 04 57 58.8 +68 19 23 Gx (S?) 13.0 12.1 0.9 13.1 2.1 × 1.5 85 0.002969 12.54 14.400 F, S, R, bMN, F D * sf UGC 3203; MCG 11-7-2; CGCG 306-7; IRAS 04527+6814; CGCG 307-1; KCPG 104
IC 440 06 19 13.0 +80 04 06 Gx (Sab) 14.1 13.3 0.8 13.6 1.6 × 0.9 33 0.014490 61.20 vF, S UGC 3427; MCG 13-5-21; CGCG 348-16; KCPG 109; IRAS 06102+8005
IC 442 06 36 11.9 +82 58 08 Gx (E-S0) 13.9 12.9 1.0 12.5 0.9 × 0.9 0.014223 60.08 F, S, R, mbM UGC 3470; MCG 14-4-3; CGCG 362-22; KCPG 113A; CGCG 363-5; NPM1G +83.0016
IC 445 06 37 21.0 +67 51 36 Gx (S0) 14.2 13.2 1.0 13.2 1.2 × 0.9 7 0.017592 74.31 eF, S, R, B * sf UGC 3497; MCG 11-9-1; CGCG 308-33; KCPG 114A
IC 449 06 45 40.8 +71 20 37 Gx (E2) 13.5 12.5 1.0 13.4 1.7 × 1.3 69 0.011785 49.78 pF, S, R, bM, bet 2 D st UGC 3515; MCG 12-7-14; CGCG 330-12
IC 450 06 52 12.3 +74 25 39 Gx (S0-a) 15.0 13.9 1.1 12.7 0.8 × 0.5 130 0.018813 79.46 vF, S UGC 3547; MCG 12-7-18; MK 6; IRAS 06457+7429; KUG 0645+744; NPM1G +74.0026; CGCG 330-17
IC 451 06 52 51.8 +74 28 48 Gx (Sb) 14.6 13.8 0.8 14.0 1.3 × 1.1 155 0.017088 72.18 vF, S UGC 3550; MCG 12-7-19; CGCG 330-18
IC 467 07 30 17.8 +79 52 21 Gx (SBc) 13.2 12.6 0.6 14.0 3.1 × 1.2 80 0.006811 28.77 30.540 vF, pS, ssF of 2336 UGC 3834; MCG 13-6-7; CGCG 348-35; IRAS 07218+7958; CGCG 349-5; KCPG 132B
IC 499 08 45 17.3 +85 44 26 Gx (Sa) 13.4 12.5 0.9 13.2 2.1 × 1.1 80 0.006278 26.52 pF, S, mbM, * nf UGC 4463; MCG 14-4-54; CGCG 363-46; CGCG 364-5; NPM1G +85.0024; most northern IC
IC 512 09 03 49.0 +85 30 06 Gx (Sc) 12.9 12.2 0.7 13.0 1.8 × 1.3 1 0.005384 22.74 26.700 F, S, R, gbM UGC 4646; MCG 14-5-2; CGCG 363-49; CGCG 364-8; IRAS 08508+8541
IC 520 08 53 42.1 +73 29 27 Gx (SBab) 12.6 11.7 0.9 12.8 1.5 × 1.3 0 0.011628 49.12 pB, pL, bM, * nr UGC 4630; MCG 12-9-26; CGCG 331-73; IRAS 08483+7340; ARAK 183; CGCG 332-25
IC 529 09 18 32.9 +73 45 35 Gx (Sc) 12.3 11.9 0.4 13.4 3.3 × 1.3 145 0.007545 31.87 32.280 pF, pL, E UGC 4888; MCG 12-9-35; CGCG 332-38; IRAS 09134+7358
IC 2174 07 09 05.0 +75 21 13 Gx (SBa) 14.3 13.5 0.8 13.2 0.9 × 0.7 42 0.012655 53.45 eF, S, bM UGC 3666; MCG 13-6-2; CGCG 348-30
IC 2179 07 15 32.3 +64 55 34 Gx (E1) 13.5 12.4 1.1 12.6 1.1 × 1.1 0.014463 61.09 * 13 in vF, vS neb [? = III 746] UGC 3750; MCG 11-9-38A; CGCG 309-25; KCPG 128A
IC 2184 07 29 24.9 +72 07 43 Gx (Sbc) 13.9 13.1 0.8 12.7 0.8 × 0.7 0 0.012022 50.78 vF, S, stell, r UGC 3852; MCG 12-7-41; MK 8; IRAS 07236+7213; KCPG 135A; CGCG 330-39; 7ZW 156; VV 644
IC 2209 07 56 14.2 +60 18 14 Gx (SBb) 14.3 13.7 0.6 13.6 1.1 × 0.9 145 0.004574 19.32 24.900 vF, S, lbM UGC 4093; MCG 10-12-17; MK 13; IRAS 07519+6026; CGCG 286-78; CGCG 287-8; KUG 0751+604
IC 2389 08 47 58.3 +73 32 19 Gx (SBb) 14.0 13.4 0.6 12.5 1.4 × 0.3 126 0.007942 33.55 32.070 vF, S, lbM UGC 4576; MCG 12-9-11; CGCG 331-64; IRAS 08425+7343; CGCG 332-11; VV 798

Legend

Key to columns [277]
Name NGC/IC Designation
RA Right Ascension (J2000.0)
Dec Declination (J2000.0)
Type Object type
bMag Photographic (blue) magnitude
vMag Visual magnitude
B-V Difference of visual and blue magnitude
SB Surface brightness (mag/arcmin2)
Dim Dimensions (arcmin)
PA Position Angle (°)
z Redshift (from NED or LEDA)
D(z) Distance derived from z in Mpc, using D(z) = cz/H0, with Hubble Parameter H0 = 71 (km/s)/Mpc
MD Metric distance: for galaxies with S = 1, 6, 7 or 8 in Mpc (from NED); for other types with S = 2, 3, 4, or 5 in kpc
Dreyer Description See below
Identification, Remarks

Dreyer Description

Descriptions according to J.L.E. Dreyer [313, 314, 315]
ab about
alm almost
am among
annul annular or ring nebula
att attached
b brighter
bet between
biN binuclear
bn brightest to n side
bs brightest to s side
bp brightest to p side
bf brightest to f side
B bright
c considerably
chev chevelure
co coarse, coarsely
com cometic (cometary form)
comp companion
conn connected
cont in contact
C compressed
Cl cluster
d diameter
def defined
dif diffused
diffic difficult
dist distance, or distant
D double
e extremely, excessively
ee most extremely
er easily resolvable
exc excentric
E extended
f following (eastward)
F faint
g gradually
glob. globular
gr group
i irregular
iF irregular figure
inv involved, involving
l little (adv.); long (adj.)
L large
m much
m magnitude
M middle, or in the middle
n north
neb nebula
nebs nebulous
neby nebulosity
nf north following
np north preceding
ns north-south
nr near
N nucleus, or to a nucleus
p preceding (westward)
pf preceding-following
p pretty (adv., before F. B. L, S)
pg pretty gradually
pm pretty much
ps pretty suddenly
plan planetary nebula (same as PN)
prob probably
P poor (sparse) in stars
PN planetary nebula
r resolvable (mottled, not resolved)
rr partially resolved, some stars seen
rrr well resolved, clearly consisting of stars
R round
RR exactly round
Ri rich in stars
s suddenly (abruptly)
s south
sf south following
sp south preceding
sc scattered
sev several
st stars (pl.)
st 9... stars of 9th magnitude and fainter
st 9..13 stars of mag. 9 to 13
stell stellar, pointlike
susp suspected
S small in angular size
S* small (faint) star
trap trapezium
triangle triangle, forms a triangle with
triN trinuclear
v very
vv _very_
var variable
* a single star
*10 a star of 10th magnitude
*7-8 star of mag. 7 or 8
** double star (same as D*)
*** triple star
! remarkable
!! very much so
!!! a magnificent or otherwise interesting object

References

  • [277] «Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
  • [313] «A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged» Dreyer, J. L. E. (1888); Memoirs of the Royal Astronomical Society. 49: 1–237; Bibcode:1888MmRAS..49....1D
  • [314] «Index Catalogue of Nebulæ found in the years 1888 to 1894, with Notes and Corrections to the New General Catalogue» Dreyer, J. L. E.; Memoirs of the Royal Astronomical Society, Vol. 51, p.185; 1895; Bibcode:1895MmRAS..51..185D
  • [315] «Second Index Catalogue of Nebulae and Clusters of Stars; containing objects found in the years 1895 to 1907, with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888–94» Dreyer, J. L. E. (1910); Memoirs of the Royal Astronomical Society. 59: 105–198; Bibcode:1910MmRAS..59..105D