Tarantula Nebula (NGC 2070 / 30 Doradus / Caldwell 103)
Coordinates, LMC distance (49.6 kpc / 161,800 ly), R136 super star cluster (R136a1), and observing guide for the Tarantula Nebula in Dorado.
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) | 5 mag | ± 0.3 mag | Wide-aperture integrated starburst photometry (core NGC 2070 is ~8.0) | high-confidence | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
| Heliocentric distance | 161800 ly | ± 2000 ly | LMC late-type detached eclipsing binaries (49.59 ± 0.63 kpc, Pietrzyński 2019) (J2016.0) | definitive | SIMBAD Astronomical Database (CDS) |
| Apparent diameter | 40 arcmin | ± 4 arcmin | Optical H-alpha and [O III] spider filaments (40′ × 25′) | definitive | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
| R136 central cluster age | 0.0015 Gyr | ± 0.0003 Gyr | HST/JWST Wolf-Rayet & O2/O3 V spectroscopy (1.5 ± 0.3 Myr) | definitive | SIMBAD Astronomical Database (CDS) |
J2000 Equatorial Sky Chart & Culmination Altitude
The chart below plots Tarantula Nebula (NGC 2070 / 30 Doradus) at RA 05h 38m 41.60s, Dec -69° 05′ 34.0″ within Dorado, 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 Tarantula Nebula (NGC 2070, 30 Doradus, Caldwell 103) is the largest, most massive, and most violently active star-forming region in the entire Local Group of galaxies, residing 161,800 light-years (49.59 ± 0.63 kiloparsecs) away inside our satellite galaxy, the Large Magellanic Cloud (LMC), in Dorado. First recorded as a nebula by Nicolas-Louis de Lacaille in December 1751, NGC 2070 spans roughly 40 × 25 arcminutes—yielding a true physical span ofnearly 1,800 light-years across. Its intrinsic luminosity is so staggering that if the Tarantula Nebula were moved to the 1,344-light-year distance of the Orion Nebula (M42), it would cover 60 degrees of the sky (30 full Moons wide) and cast visible shadows on Earth at night.
Powering this extragalactic monster is the 1.5-million-year-old super star cluster R136 (RMC 136) at the nebula's heart, which packs ~450,000 solar masses of young stars into a core just a few parsecs wide. Inside R136 reside the most massive and luminous stars known to science—led by the hydrogen-rich Wolf-Rayet star R136a1 (spectral type WN5h), which has a current mass of ~170–230 solar masses, a surface temperature above 46,000 K, and a bolometric luminosity exceeding 6 million Suns.
Intersecting shockwaves from prior supernovae and stellar winds weave the glowing gas into long, arched spider legs of [O III] and H-alpha filaments, while on the nebula's southwestern outskirts lies the expanding remnant of Supernova 1987A.
Practical Visual Observing Guide
- Located on the eastern side of the Large Magellanic Cloud at declination −69°06′ (circumpolar from the Southern Hemisphere; invisible north of +20°N).
- Even from 161,800 light-years away in another galaxy, the Tarantula Nebula is easily visible to the naked eye at magnitude ~5.0 as a bright condensation in the LMC.
- In any 80–200 mm telescope at 60×–150× equipped with an O-III or UHC filter, the glowing central knot of super star cluster R136 and the looping arachnid legs of ionized gas outshine almost every Milky Way nebula except M42 and Eta Carinae.
Catalog Cross-Identifications & Aliases
Common Aliases: NGC 2070 · 30 Doradus · Tarantula Nebula · Caldwell 103
| Catalog Authority | Identifier |
|---|---|
| NGC | NGC 2070 |
| SIMBAD | NGC 2070 |
| WIKIDATA | Q13984 |
Related Objects, Comparisons & Guides
SN 1987A Remnant (LMC Triple-Ring Supernova)
Coordinates, LMC distance (49.6 kpc / 161,800 ly), equatorial pearl necklace shock, JWST central neutron star detection, and SN 1987A data.
Carina Nebula (NGC 3372 Star-Forming Cloud)
Coordinates, Gaia DR3 distance (2.35 kpc), Keyhole Nebula, Trumpler 14/16 OB clusters, and observing guide for NGC 3372 in Carina.
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.
Apparent vs Absolute Magnitude Explained
Understand the logarithmic Pogson astronomical magnitude scale, apparent visual magnitude (m), absolute magnitude (M at 10 parsecs), and bolometric corrections.
Trigonometric Parallax, Parsecs & Gaia DR3
How trigonometric parallax (d_pc = 1 / p_arcsec), the distance modulus equation, Hipparcos, and Gaia DR3 microarcsecond astrometry measure cosmic distances.
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
- SIMBAD Astronomical Database (CDS) (2026-10 release): Wenger, M., et al. 2000, A&AS, 143, 9 (The SIMBAD astronomical database) — Centre de Données astronomiques de Strasbourg
- 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