Carina Nebula (NGC 3372)
Coordinates, Gaia DR3 distance (2.35 kpc), Keyhole Nebula, Trumpler 14/16 OB clusters, and observing guide for NGC 3372 in Carina.
Provenance-Backed Scientific Measurements
Every measurement below preserves its unit, uncertainty interval, observational method, reference epoch, quality status, and primary catalog source. See Uncertainty & Provenance for how competing measurements are handled.
| Parameter | Value | Uncertainty | Method & Epoch | Quality Status | Source Archive |
|---|---|---|---|---|---|
| Integrated visual magnitude (V) | 1 mag | ± 0.3 mag | Wide-angle integrated photographic/CCD photometry | high-confidence | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
| Distance (Trumpler 14 & 16 Gaia DR3) | 2350 pc | ± 50 pc | Gaia DR3 astrometric parallax of O-type cluster members (J2016.0) | definitive | ESA Gaia Archive — Data Release 3 |
| Apparent angular span | 120 arcmin | ± 10 arcmin | Optical H-alpha emission complex (2.0° × 2.0°) | high-confidence | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
J2000 Equatorial Sky Chart & Culmination Altitude
The chart below plots Carina Nebula (NGC 3372 Star-Forming Cloud) at RA 10h 45m 07.00s, Dec -59° 52′ 00.0″ within Carina, alongside peak meridian transit altitudes for 40°N and 30°S observers. Use the RA/Dec Coordinate Converter to compute exact culmination altitude for your latitude.
Astrophysical Context & Structure
The Carina Nebula (NGC 3372, Caldwell 92) is one of the largest and most violently active H II star-forming regions in the Milky Way, spanning roughly 2 degrees (300 light-years physically) across the Carina–Sagittarius spiral arm at a distance of 2.35 ± 0.05 kiloparsecs (7,660 light-years). First cataloged by Nicolas-Louis de Lacaille from South Africa in 1752, NGC 3372 is four times larger on the sky than the Orion Nebula and far more luminous intrinsically.
Powering the nebula are more than 70 O-type stars and three Wolf-Rayet stars concentrated in the young open clusters Trumpler 14, Trumpler 15, Trumpler 16, Collinder 228, and Bochum 10/11, along with the hyperluminous binary system Eta Carinae. Radiation and supersonic winds from these massive stars have carved a giant bipolar superbubble out of the surrounding molecular cloud.
In July 2022, NASA released the James Webb Space Telescope's iconic 'Cosmic Cliffs' First Deep Field image of NGC 3324 on the northwestern rim of the Carina complex, showing cavernous ionization fronts, towering dust pillars, and bipolar protostellar jets emerging from embedded stellar nurseries.
Practical Visual Observing Guide
- At declination −59°52′, NGC 3372 is a showpiece of the southern Milky Way (visible south of ~30°N latitude), glowing to the naked eye as a bright 2°-wide patch brighter than any other emission nebula.
- In 10×50 binoculars or a wide-field telescope at 20×–40×, three broad dark dust lanes converge like a black V or Y across four brilliant emission lobes.
- Increase magnification to 100×–200× near the central dark lane to inspect the loop-shaped Keyhole Nebula (NGC 3324 subgroup) and the orange bilobed Homunculus Nebula surrounding Eta Carinae.
Catalog Cross-Identifications & Aliases
Common Aliases: NGC 3372 · Eta Carinae Nebula · Caldwell 92
| Catalog Authority | Identifier |
|---|---|
| NGC | NGC 3372 |
| SIMBAD | NGC 3372 |
| WIKIDATA | Q51008 |
Related Objects, Comparisons & Guides
Eta Carinae (Luminous Blue Variable Binary)
Coordinates, Gaia/expansion distance (2.35 kpc), 5 million L☉ luminosity, 1843 Great Eruption Homunculus, and observing guide for Eta Carinae.
Orion Nebula (Messier 42 / NGC 1976)
Coordinates, VLBI/Gaia distance (412 pc), Trapezium ionizing cluster, and visual observing guide for the Orion Nebula (M42) in Orion.
Lagoon Nebula (Messier 8 / NGC 6523)
Coordinates, Gaia DR3 distance (1.25 kpc), NGC 6530 cluster, Hourglass core, and observing guide for the Lagoon Nebula (M8) in Sagittarius.
Binocular Deep-Sky Objects Observing Guide
How to observe open clusters, globular clusters, diffuse nebulae, and Local Group galaxies with 7x50, 10x50, and 15x70 astronomy binoculars.
Surface Brightness & Extended Objects Guide
Why surface brightness (mag/arcsec²) governs nebula and galaxy visibility more than integrated magnitude, and how exit pupil controls eyepiece contrast.
Stellar Spectral Classification (OBAFGKM)
Reference guide to Morgan-Keenan (MK) stellar classification (O B A F G K M), luminosity classes (I–V, WD), color index (B-V), and the H-R diagram.
NGC & Caldwell Deep-Sky Cross-Walk Catalog
Cross-reference guide to Dreyer's New General Catalogue (NGC) showpieces, including southern gems Omega Centauri, 47 Tucanae, Carina Nebula, and the Veil.
Scientific Sources & Dataset Provenance
- Revised New General Catalogue and Index Catalogue (RNGC/IC) (2024/2026 edition): Steinicke, W. 2010, Observing and Cataloguing Nebulae and Star Clusters (Cambridge Univ. Press); Verga, M. OpenNGC (CC-BY-SA 4.0 / data tables) — Wolfgang Steinicke / OpenNGC
- ESA Gaia Archive — Data Release 3 (DR3 (2022-06-13)): Gaia Collaboration, Vallenari, A., et al. 2023, A&A, 674, A1 (Gaia Data Release 3) — European Space Agency / Gaia DPAC
- JWST / MAST Science Archive & Mission Documentation (Cycle 1–4 Public Releases (2022–2026)): Rigby, J., et al. 2023, PASP, 135, 048001 (The Science Performance of JWST as Characterized in Commissioning) — NASA / ESA / CSA / STScI