Dumbbell Nebula (Messier 27 / NGC 6853)
Coordinates, Gaia DR3 distance (389 pc), magnitude 7.4, central white dwarf, and observing guide for the Dumbbell Nebula (M27).
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) | 7.4 mag | ± 0.1 mag | Integrated CCD aperture photometry | definitive | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
| Distance (Gaia DR3 central star) | 389 pc | ± 6 pc | Gaia DR3 trigonometric parallax (2.572 ± 0.041 mas) of central white dwarf (J2016.0) | definitive | ESA Gaia Archive — Data Release 3 |
| Apparent major axis | 8 arcmin | ± 0.4 arcmin | Bright optical nebula (8.0′ × 5.7′) | definitive | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
| Mean visual surface brightness | 20.3 mag/arcsec² | ± 0.2 mag/arcsec² | Derived from V=7.4 mag over 8.0′ × 5.7′ ellipse | high-confidence | Revised New General Catalogue and Index Catalogue (RNGC/IC) |
J2000 Equatorial Sky Chart & Culmination Altitude
The chart below plots Dumbbell Nebula (Messier 27 in Vulpecula) at RA 19h 59m 36.34s, Dec +22° 43′ 16.1″ within Vulpecula (Summer Triangle), 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 Dumbbell Nebula (Messier 27, NGC 6853) holds the distinction of being the very first planetary nebula ever discovered, spotted by Charles Messier on July 12, 1764, in the constellation Vulpecula inside the Summer Triangle. Located 389 ± 6 parsecs (1,269 light-years) from Earth, M27 has an integrated visual magnitude of 7.4 and spans 8.0 × 5.7 arcminutes—roughly a quarter the diameter of the full Moon.
While the Ring Nebula (M57) is a bipolar barrel viewed nearly down its polar axis, the Dumbbell Nebula is a similar three-dimensional structure seen nearly perpendicular to its symmetry axis, revealing two bright opposing lobes shaped like an hourglass or apple core. Expanding at roughly 31 km/s, the main shell has a physical diameter of ~2.9 light-years and a kinematic age of ~10,000–12,000 years.
At the center of M27 sits a hot DAO white dwarf (magnitude 13.9, surface temperature ~85,000 K) with one of the largest measured physical radii known among white dwarfs (~0.055 solar radii), caught in the rapid transition from asymptotic giant branch core to degenerate remnant.
Practical Visual Observing Guide
- Situated 3.2° directly north of Gamma Sagittae (γ Sge), the tip star of the Arrow in Sagitta, inside the Summer Triangle.
- Readily visible in 7×50 or 10×50 binoculars as a large, pale rectangular or oval patch—the easiest planetary nebula in the sky for binoculars.
- In a 100–150 mm telescope at 60×–120×, the twin bright wedges ('apple core') are unmistakable, and an O-III filter fills in the fainter outer 'ears' that complete the 8-arcminute football shape.
Catalog Cross-Identifications & Aliases
Common Aliases: M27 · NGC 6853 · Apple Core Nebula
| Catalog Authority | Identifier |
|---|---|
| MESSIER | M 27 |
| NGC | NGC 6853 |
| SIMBAD | M 27 |
| WIKIDATA | Q13653 |
Related Objects, Comparisons & Guides
Ring Nebula (Messier 57 in Lyra)
Coordinates, Gaia DR3 central star distance (787 pc), magnitude 8.8, and telescope observing guide for the Ring Nebula (M57) in Lyra.
Helix Nebula (NGC 7293 in Aquarius)
Coordinates, Gaia DR3 distance (200 pc), low surface brightness (20.8 mag/arcsec²), and observing guide for the Helix Nebula (NGC 7293).
Albireo (Beta Cygni Color Double Star)
Coordinates, Gaia DR3 parallaxes of Beta Cygni A & B, 34.6″ angular separation, color contrast, and observing guide for Albireo in Cygnus.
Ring Nebula (M57) vs Dumbbell Nebula (M27)
Compare the two flagship summer planetary nebulae—the Ring Nebula (M57) in Lyra and Dumbbell Nebula (M27) in Vulpecula—in size, brightness, and optics.
Surface Brightness vs Magnitude Field Guide
Field guide to how surface brightness (mag/arcsec²) and integrated magnitude govern naked-eye, binocular, and telescope visibility of nebulae and galaxies.
Northern Summer Milky Way Observing Tour
Summer observing guide from the Summer Triangle (Vega, Altair, Deneb) and Hercules Keystone down the Milky Way rift to the Sagittarius Galactic Center.
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.
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.
Messier Catalog (M) Objects & Cross-Reference
Guide and cross-walk to Charles Messier's flagship deep-sky catalog (M1 to M104 in FastAstro), linking Messier numbers to NGC IDs, distances, and magnitudes.
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
- 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
- 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