Another project to capture as many Caldwell objects as possible. Many of the later ones (60+) are southern hemisphere objects so it is unlikely I will get them here – at least not without some travel.
“The Caldwell Catalogue is an astronomical catalog of 109 bright star clusters, nebulae, and galaxies for observation by amateur astronomers. The list was compiled by Sir Patrick Caldwell-Moore, better known as Patrick Moore, as a complement to the Messier Catalogue.”
| C# | NGC/IC | Con. | Type | Mag. | Size () | Description |
| 1 | 188 | Cep | OC | 8.1 | 14 | |
| 2 | 40 | Cep | PN | 11.6 | 0.6 | |
| 3 | 4236 | Dra | SbG | 9.7 | 21 x 7 | |
| 4 | 7023 | Cep | BN | 6.8 | 18 x 18 | Reflection Nebula |
| 5 | IC 342 | Cam | SBcG | 9.2 | 18 x 17 | |
| 6 | 6543 | Dra | PN | 8.8 | 0.3/5.8 | Cat’s Eye Nebula |
| 7 | 2403 | Cam | ScG | 8.9 | 18 x 10 | |
| 8 | 559 | Cas | OC | 9.5 | 4 | |
| 9 | Sh2-155 | Cep | BN | 7.7 | 50 x 10 | Cave Nebula |
| 10 | 663 | Cas | OC | 7.1 | 16 | |
| 11 | 7635 | Cas | BN | 7.0 | 15 x 8 | Bubble Nebula |
| 12 | 6946 | Cep | ScG | 9.7 | 11 x 9 | |
| 13 | 457 | Cas | OC | 6.4 | 13 | Phi Cas Cluster |
| 14 | 869/ 884 | Per | OC double | 4.3 | 30 and 30 | Sword Handle |
| 15 | 6826 | Cyg | PN | 9.8 | 0.5/2.3 | Blinking Nebula |
| 16 | 7243 | Lac | OC | 6.4 | 21 | |
| 17 | 147 | Cas | dE4G | 9.3 | 13 x 8 | |
| 18 | 185 | Cas | dE0G | 9.2 | 12 x 9 | |
| 19 | IC 5146 | Cyg | BN | 10.0 | 12 x 12 | Cocoon Neb |
| 20 | 7000 | Cyg | BN | 6.0 | 120 x 100 | North American Nebula |
| 21 | 4449 | CVn | IG | 9.4 | 5 x 3 | |
| 22 | 7662 | And | PN | 9.2 | 0.3/2.2 | |
| 23 | 891 | And | SbG | 9.9 | 14 x 2 | |
| 24 | 1275 | Per | Seyfert G | 11.6 | 2.6 x 1 | Per A radio source |
| 25 | 2419 | Lyn | GC | 10.4 | 4.1 | |
| 26 | 4244 | CVn | SG | 10.6 | 16 x 2.5 | |
| 27 | 6888 | Cyg | BN | 7.5 | 20 x 10 | Crescent Nebula |
| 28 | 752 | And | OC | 5.7 | 50 | |
| 29 | 5005 | CVn | SbG | 9.8 | 5.4 x 2 | |
| 30 | 7331 | Peg | SbG | 9.5 | 11 x 4 | |
| 31 | IC 405 | Aur | BN | 6.0 | 30 x 19 | Flaming Star Nebula |
| 32 | 4631 | CVn | ScG | 9.3 | 15 x 3 | |
| 33 | 6992/5 | Cyg | SN | — | 60 x 8 | East Veil Nebula |
| 34 | 6960 | Cyg | SN | — | 70 x 6 | West Veil Nebula |
| 35 | 4889 | Com | E4G | 11.4 | 3 x 2 | Brightest in cluster |
| 36 | 4559 | Com | ScG | 9.8 | 10 x 4 | |
| 37 | 6885 | Vul | OC | 5.7 | 7 | |
| 38 | 4565 | Com | SbG | 9.6 | 16 x 3 | |
| 39 | 2392 | Gem | PN | 9.9 | 0.2/0.7 | Eskimo Nebula |
| 40 | 3626 | Leo | SbG | 10.9 | 3 x 2 | |
| 41 | — | Tau | OC | 1.0 | 330 | Hyades |
| 42 | 7006 | Del | GC | 10.6 | 2.8 | Very distant globular |
| 43 | 7814 | Peg | SbG | 10.5 | 6 x 2 | |
| 44 | 7479 | Peg | SBbG | 11.0 | 4 x 3 | |
| 45 | 5248 | Boo | ScG | 10.2 | 6 x 4 | |
| 46 | 2261 | Mon | BN | 10.0 | 2 x 1 | Hubble’s Variable Neb. |
| 47 | 6934 | Del | GC | 8.9 | 5.9 | |
| 48 | 2775 | Can | SaG | 10.3 | 4.5 x 3 | |
| 49 | 2237-9 | Mon | BN | — | 80 x 60 | Rosette Nebula |
| 50 | 2244 | Mon | OC | 4.8 | 24 | |
| 51 | IC 1613 | Cet | IG | 9.0 | 12 x 11 | |
| 52 | 4697 | Vir | E4G | 9.3 | 6 x 3 | |
| 53 | 3115 | Sex | E6G | 9.1 | 8 x 3 | Spindle Galaxy |
| 54 | 2506 | Mon | OC | 7.6 | 7 | |
| 55 | 7009 | Aqr | PN | 8.3 | 2.5/1 | Saturn Nebula |
| 56 | 246 | Cet | PN | 8.0 | 3.8 | |
| 57 | 6822 | Sgr | IG | 9.3 | 10 x 9 | Barnard’s Galaxy |
| 58 | 2360 | CMa | OC | 7.2 | 13 | |
| 59 | 3242 | Hya | PN | 8.6 | 0.3/21 | Ghost of Jupiter |
| 60 | 4038 | Crv | ScG | 11.3 | 2.6 x 1.8 | The Antennae |
| 61 | 4039 | Crv | ScG | 13.0 | 3.2 x 2.2 | The Antennae |
| 62 | 247 | Cet | SG | 8.9 | 20 x 7 | |
| 63 | 7293 | Aqr | PN | 6.5 | 13 | Helix Nebula |
| 64 | 2362 | CMa | OC | 4.1 | 8 | Tau CMa Cluster |
| 65 | 253 | Scl | SG | 7.1 | 25 x 7 | Sculptor Galaxy |
| 66 | 5694 | Hya | GC | 10.2 | 3.6 | |
| 67 | 1097 | For | SBbG | 9.2 | 9 x 6 | |
| 68 | 6729 | CrA | BN | 9.7 | 1.0 | R CrA Nebula |
| 69 | 6302 | Sco | PN | 12.8 | 0.8 | Bug Nebula |
| 70 | 300 | Scl | SdG | 8.1 | 20 x 13 | |
| 71 | 2477 | Pup | OC | 5.8 | 27 | |
| 72 | 55 | Scl | SBG | 8.2 | 32 x 6 | Brightest in Scl Cluster |
| 73 | 1851 | Col | GC | 7.3 | 11 | |
| 74 | 3132 | Vel | PN | 8.2 | 0.8 | |
| 75 | 6124 | Sco | OC | 5.8 | 29 | |
| 76 | 6231 | Sco | OC | 2.6 | 15 | |
| 77 | 5128 | Cen | Peculiar Galaxy | 7.0 | 18 x 14 | Cen A radio source |
| 78 | 6541 | CrA | GC | 6.6 | 13 | |
| 79 | 3201 | Vel | GC | 6.7 | 18 | |
| 80 | 5139 | Cen | GC | 3.6 | 36 | Omega Centauri |
| 81 | 6352 | Ara | GC | 8.1 | 7 | |
| 82 | 6193 | Ara | OC | 5.2 | 15 | |
| 83 | 4945 | Cen | SBcG | 9.5 | 20 x 4 | |
| 84 | 5286 | Cen | GC | 7.6 | 9 | |
| 85 | IC 2391 | Vel | OC | 2.5 | 50 | o (Omicron) Vel Cluster |
| 86 | 6397 | Ara | GC | 5.6 | 26 | |
| 87 | 1261 | Hor | GC | 8.4 | 7 | |
| 88 | 5823 | Cir | OC | 7.9 | 10 | |
| 89 | 6087 | Nor | OC | 5.4 | 12 | S Nor Cluster |
| 90 | 2867 | Car | PN | 9.7 | 0.2 | |
| 91 | 3532 | Car | OC | 3.0 | 55 | |
| 92 | 3372 | Car | BN | 6.2 | 120 x 120 | Eta Carinae Nebula |
| 93 | 6752 | Pav | GC | 5.4 | 20 | |
| 94 | 4755 | Cru | OC | 4.2 | 10 | Jewel Box Cluster |
| 95 | 6025 | TrA | OC | 5.1 | 12 | |
| 96 | 2516 | Car | OC | 3.8 | 30 | |
| 97 | 3766 | Cen | OC | 5.3 | 12 | |
| 98 | 4609 | Cru | OC | 6.9 | 5 | |
| 99 | — | Cru | DN | — | 400 x 300 | Coal Sack |
| 100 | IC 2944 | Cen | OC | 4.5 | 15 | – (Lambda) Cen Cluster |
| 101 | 6744 | Pav | SBbG | 9.0 | 16 x 10 | |
| 102 | IC 2602 | Car | OC | 1.9 | 50 | ÷ (Theta) Car Cluster |
| 103 | 2070 | Dor | BN | 1.0 | 40 x 25 | Tarantula Neb. in LMC |
| 104 | 362 | Tuc | GC | 6.6 | 13 | |
| 105 | 4833 | Mus | GC | 7.3 | 14 | |
| 106 | 104 | Tuc | GC | 4.0 | 31 | 47 Tucanae |
| 107 | 6101 | Aps | GC | 9.3 | 11 | |
| 108 | 4372 | Mus | GC | 7.8 | 19 | |
| 109 | 3195 | Cha | PN | — | 0.6 |
BN = Bright nebula
GC = Globular cluster
OC = Open cluster
EG = Elliptical (type) galaxy
DN = Dark nebula
IG = Irregular galaxy
PN = Planetary nebula
SN = Supernova remnant
SG = Spiral (type) galaxy
Iris Nebula NGC 7023 / C4
Bringing out the all the dusty, dark material leaves me with a horrible background.
| Object ID | Iris Nebula NGC 7023 / C4 |
| Details | 2020-09-19 Mag. 6.8 |
| Telescope | 250mm f4.8 Newtonian, MPCC |
| Camera | QHY168C @15°C 2/20 gain/offset IDAS P2 |
| Exposure(s) | 28x180s 10/50 darks, flats, bias |
| Capture | APT |
| Processing | APP, Photoshop |
The Iris Nebula is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487. The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated SAO 19158.
Wikipedia
NGC188 (C1)
Never noticed this one before. Very close to the pole so easy guiding as nothing moves very much round there.
| Object ID | NGC188, Caldwell 1 Open Cluster, Cepheus Mag. 10 Size 11′ |
| Details | 2020-04-06 22:42 UT |
| Telescope | 250mm f4.8 OO Newtonian |
| Camera | ATIK 460EX @-15C |
| Exposure(s) | 3x180s 1×1 TR, 2x180s 1×1 TG, TB Darks, flats, bias |
| Capture | APT |
| Processing | APP, Photoshop |
NGC 6992/6995 Eastern Veil (C33)
Could only fit part in the FOV
| Object ID | NGC 6992/6995 Eastern Veil, Caldwell 33 |
| Details | Size 60’ x 8′ |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX -16C |
| Exposure(s) | 10x180s ea RGB 1×1 |
| Capture | APT |
| Processing | APP, Photoshop |
Cygnus Wall NGC 700 (Caldwell 20)
Part of the North America nebula – the Central America part – seems to be known as the Cygnus Wall. Can only fit a small part of this object in my FOV.
| Object ID | NGC 7000, C20 |
| Details | Mag. 4 Size: 120′ x 100′ |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX, Baader filters -15C |
| Exposure(s) | 10x300s ea in Ha and OIII |
| Capture | APT |
| Processing | APP, Photoshop Mapped HOO and moved to the blue end |
Cave Nebula Sh2-155 / Caldwell 9
Sh2-155 is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula. Sh2 designation because it’s part of the Sharpless Catalog (1959) of 312 HII regions. About 2400 light years from Earth and a stellar nursery.
Narrowband filters really do cut through the murky, light polluted skies of Edinburgh so well. Obviously false colour, has to be for narrowband, but can’t decide which is the best so two different tone mappings: SII Ha OIII -> RGB and Ha OIII SII
| Object ID | Cave Nebula Sh2-155 / C9 |
| Details | Cepheus Mag. 7.7, 50′ x 30′ |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX |
| Exposure(s) | 10 x 180s each Ha OIII SII 2×2 |
| Capture | APT |
| Processing | DSS, Nebulosity, Photoshop |
Iris Nebula NGC 7023 / Caldwell 4
Been meaning to do this one for ages. Not easy because the background gas and dust can be easily lost in the light pollution and noise.
“The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +6.8 star, SAO 19158.”
Wikipedia
| Object ID | Iris Nebula NGC 7023 / C4 |
| Details | Cepheus Mag. 6.8, 18′ x 18′ |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX |
| Exposure(s) | 10 x 180s each RGB 1×1 |
| Capture | APT |
| Processing | Nebulosity, Photoshop |