Object Catalog
This is a data-driven index of deep-sky objects. Each object gets its own page, recording its host constellation, right ascension / declination (RA/Dec), magnitude, type, visible hemisphere, season, recommended focal length, and a brief description. To add a new object, just edit the data file—the detail page and the filterable index below update automatically.
Crab Nebula
The famous remnant of the supernova recorded in 1054 AD.
Messier 3
A bright, rich globular cluster famous for its many RR Lyrae variables.
Butterfly Cluster
An open cluster in Scorpius whose bright stars trace a butterfly's wings.
Ptolemy Cluster
A bright naked-eye open cluster in the Scorpion's tail, noted by Ptolemy.
Lagoon Nebula
A vast, bright red stellar nursery in Sagittarius split by a dark dust lane.
Messier 10
A bright globular cluster in Ophiuchus.
Wild Duck Cluster
A rich open cluster shaped like a flight of ducks.
Messier 12
A loosely concentrated globular in Ophiuchus.
Hercules Globular Cluster
The northern sky's grandest globular, target of the Arecibo message.
Messier 15
A dense, core-collapsed globular hosting the planetary nebula Pease 1.
Eagle Nebula
Home of Hubble's iconic Pillars of Creation, a stellar nursery in Serpens.
Omega Nebula
Bright swan-shaped star-forming region, one of the Galaxy's brightest.
Trifid Nebula
Classic three-lobed nebula combining red emission, blue reflection and dark dust.
Messier 22
One of the nearest, brightest globular clusters, set in the Sagittarius Milky Way.
Dumbbell Nebula
The brightest, largest planetary nebula, the first ever discovered.
Andromeda Galaxy
The brightest spiral galaxy in the sky, naked-eye and a top beginner target.
Triangulum Galaxy
Third-largest Local Group galaxy, spiral arms dotted with pink nebulae.
Messier 35
A large open cluster paired with compact NGC 2158.
Messier 36
A young, bright blue open cluster in Auriga.
Messier 37
The richest of Auriga's open clusters, ~500 stars with an orange giant.
Orion Nebula
The brightest diffuse nebula in the sky and the top beginner target.
De Mairan's Nebula
Comma-shaped emission nebula just north of the Orion Nebula.
Beehive Cluster
One of the nearest open clusters, a naked-eye swarm in Cancer.
Pleiades
The Seven Sisters, a bright blue cluster veiled in blue reflection nebulosity.
Messier 49
The brightest giant elliptical galaxy in the Virgo Cluster.
Whirlpool Galaxy
The classic face-on grand-design spiral interacting with companion NGC 5195.
Messier 55
A loose, easily resolved Sagittarius globular.
Ring Nebula
The textbook smoke-ring planetary nebula in Lyra.
Sunflower Galaxy
Flocculent spiral with petal-like arms resembling a sunflower.
Black Eye Galaxy
Spiral galaxy with a dramatic dark dust lane and counter-rotating disks.
Messier 65
A near-edge-on spiral and member of the Leo Triplet.
Phantom Galaxy
Textbook grand-design spiral, faint but perfectly symmetric.
Messier 77
The brightest, archetypal Seyfert galaxy with a fiercely active nucleus.
Messier 78
The brightest reflection nebula in the sky, a blue glow in Orion.
Bode's Galaxy
A perfect grand-design spiral, often framed with the Cigar Galaxy M82.
Cigar Galaxy
Edge-on starburst galaxy venting red hydrogen from its core.
Southern Pinwheel Galaxy
The southern sky's most spectacular face-on barred spiral, rich in star formation.
Messier 85
A lenticular galaxy at the northern edge of Virgo.
Messier 95
A ringed barred spiral in the Leo I group.
Owl Nebula
Planetary nebula whose two dark patches form an owl's face.
Pinwheel Galaxy
A giant face-on spiral with many bright pink H II regions along its arms.
Sombrero Galaxy
Edge-on spiral with a bright bulge and a hat-brim dust lane.
Messier 106
Spiral galaxy with an active nucleus, megamasers and anomalous arms.
Surfboard Galaxy
A near-edge-on, mottled spiral resembling a surfboard, paired with M97.
Messier 88
An elegant inclined grand-design spiral in the Virgo Cluster.
Messier 87
A giant elliptical and the subject of the first-ever black hole image.
NGC 4394
A barred spiral framed alongside M85.
Bow-Tie Nebula
A small planetary nebula wrapping a hot dying star in a warm red shell.
Sculptor Galaxy
A bright nearby edge-on starburst galaxy with rich dust texture.
Pacman Nebula
Red emission nebula whose dark dust notch resembles the arcade character Pac-Man.
NGC 891
Edge-on spiral with vertical dust filaments rising from its lane.
NGC 925
An asymmetric nearby barred spiral with loose, star-forming arms.
NGC 1232
Grand face-on spiral with intricate arms and a distorted satellite.
NGC 1300
The textbook archetype of a barred spiral, immortalized by a Hubble portrait.
Great Barred Spiral Galaxy
One of the largest, most archetypal barred spirals, a Seyfert in Fornax.
California Nebula
A long red emission nebula shaped strikingly like the state of California.
Running Man Nebula
A blue reflection nebula just above the Orion Nebula.
Flame Nebula
Orange-red 'flame' split by dark dust beside Alnitak.
Monkey Head Nebula
Red emission nebula sculpted into the profile of a monkey's head.
NGC 2244
Young cluster powering and hollowing out the Rosette Nebula.
Cone Nebula & Christmas Tree Cluster
Cone pillar, Christmas Tree cluster and Fox Fur Nebula.
UFO Galaxy
An edge-on spiral resembling a flying saucer.
NGC 2841
The archetypal flocculent spiral, nicknamed the "Tiger's Eye" galaxy.
NGC 2997
A magnificent face-on grand-design spiral in the south.
Spindle Galaxy
A spindle hosting a billion-solar-mass black hole.
Hickson 44 Group
A compact group of four interacting galaxies led by the warped spiral NGC 3190.
Ghost of Jupiter
A blue-green planetary nebula the size of Jupiter's disk.
Eta Carinae / Mystic Mountain
The explosive core of the Carina Nebula, home of the supergiant Eta Carinae.
Hamburger Galaxy
Edge-on spiral with a thick dust lane and a long tidal tail.
NGC 4216
Edge-on Virgo spiral wreathed in faint tidal stellar streams.
Cocoon Galaxy
A tidally disturbed starburst galaxy towing the small companion NGC 4485.
Needle Galaxy
Spectacular edge-on spiral, slim as a needle with a central dust lane.
NGC 5195
The dwarf companion tugging on the Whirlpool Galaxy M51's grand arms.
Splinter Galaxy
An ultra-thin edge-on spiral, knife-edge sharp.
Fighting Dragons of Ara
Sculpted emission nebula shaped like two fighting dragons in Ara.
Bug Nebula
A dramatic bipolar planetary nebula with butterfly-wing lobes in Scorpius.
Cat's Paw Nebula
A prolific massive-star nursery whose red lobes resemble a cat's paw print.
War and Peace Nebula
A star-forming nebula with the hot cluster Pismis 24, aka the Lobster.
Cat's Eye Nebula
A bright planetary with intricate nested shells.
NGC 6820
Emission nebula with a star-forming dust pillar pointing at NGC 6823.
Blinking Planetary
Teal planetary nebula that appears to 'blink' at the eyepiece.
Crescent Nebula
A Wolf–Rayet wind bubble in Cygnus.
NGC 6914
Blue reflection nebulae set in a red hydrogen field.
Pickering's Triangle
The faint triangular filaments at the heart of the Cygnus Loop.
North America Nebula
Huge red emission cloud shaped like the North American continent in Cygnus.
Saturn Nebula
A planetary nebula with jets resembling Saturn's rings.
Helix Nebula
The nearest bright planetary nebula, the eye-like "Eye of God."
Wizard Nebula
An emission nebula shaped like a robed wizard, around cluster NGC 7380.
Flaming Star Nebula
A flaming star lit by runaway AE Aurigae, mixing red emission and blue reflection.
Tadpoles Nebula
Red emission nebula holding two comet-like dust 'tadpoles'.
Horsehead Nebula
Glowing red emission ridge behind the iconic Horsehead silhouette.
Jellyfish Nebula
Jellyfish-shaped supernova remnant trailing filamentary tendrils.
Elephant's Trunk Nebula
A winding dark dust pillar and stellar nursery within the vast IC 1396 complex.
Heart Nebula
A vast heart-shaped emission nebula sculpted by the cluster Melotte 15.
Witch Head Nebula
A blue reflection profile lit by the star Rigel.
Seagull Nebula
A red seagull-shaped emission complex across two constellations.
Running Chicken Nebula
Southern red nebula dotted with Bok globules.
Prawn Nebula
A huge red prawn-shaped emission cloud in Scorpius.
Pelican Nebula
Pelican-shaped emission region beside the North America Nebula.
Owl Cluster
Open cluster shaped like an owl or wide-armed alien (the ET Cluster).
Double Cluster
Two brilliant young open clusters side by side in Perseus.
Eastern Veil Nebula
The bright, lace-like eastern half of the Cygnus Loop supernova remnant.
Western Veil Nebula
The western half of the Cygnus Loop, the Witch's Broom past 52 Cygni.
Rosette Nebula
Vast red rose-shaped nebula encircling young cluster NGC 2244.
Christmas Tree Cluster
Stars arranged like a Christmas tree, pointing toward the Cone Nebula.
Omega Centauri
The Galaxy's largest, brightest globular—likely a stripped dwarf core.
Carina Nebula
The southern sky's largest, brightest emission nebula, home to volatile Eta Carinae.
Southern Pleiades
Bright nearby open cluster, the southern counterpart to the Pleiades.
Coalsack Nebula
The most prominent dark nebula in the southern sky, beside the Southern Cross.
47 Tucanae
The sky's second-brightest globular cluster, a golden swarm near the SMC.
NGC 55
Nearby asymmetric edge-on barred spiral in the Sculptor group.
NGC 247
A nearby tilted spiral with a curious star-poor void in its disk.
NGC 1097
A barred Seyfert spiral with a starburst ring, jets and a companion galaxy.
NGC 2403
M33-like spiral with arms full of pink H II regions.
Antennae Galaxies
A pair of colliding galaxies flinging out long tidal "antennae" of stars.
Pavo Galaxy
A giant flocculent barred spiral often called a twin of the Milky Way.
Fireworks Galaxy
Face-on spiral with frequent supernovae, hence 'fireworks'.
NGC 7331
A tilted Milky Way look-alike spiral with a deer of distant background galaxies.
Barnard 33
Dark dust forming the iconic Horsehead silhouette against IC 434's red glow.
Large Magellanic Cloud
The Milky Way's largest satellite galaxy, naked-eye in southern skies.
Stephan's Quintet
Famous compact group whose foreground member NGC 7320 is a chance projection.
Tulip Nebula
Tulip-shaped emission nebula near the black hole Cygnus X-1.
Cave Nebula
A red H II region whose curved dark dust frames a cave-like opening in Cepheus.
Spaghetti Nebula (Simeis 147)
A huge, faint spaghetti-like supernova remnant.
Running Man Nebula
Blue reflection nebula whose dark dust traces a running figure.
Small Magellanic Cloud
The Milky Way's second-largest satellite galaxy, naked-eye in the south.
vdB 152
A ghostly blue reflection nebula at a dark dust's tip.
Catalog Designation Cheat Sheet
Section titled “Catalog Designation Cheat Sheet”- M (Messier)—110 of the brighter deep-sky objects, often used as targets for beginning observers and astrophotographers.
- NGC / IC (New General Catalogue + Index Catalogue supplements)—about 7840 + 5386 objects, offering broader coverage.
- Caldwell—fills in bright objects that Messier omitted (especially in the southern sky).
Coordinates and magnitudes are commonly used approximations (J2000). For formal data entry, we recommend relying on SIMBAD / Stellarium data.