# Draco II

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Extremely faint candidate satellite galaxy of the Milky Way

Draco II / Laevens 4 Photograph of the Draco II satellite galaxy. Observation data (J2000 epoch) Constellation Draco Right ascension 15h 52m 47.6s[1] Declination +64° 33′ 55″[1] Distance 70.1±1.3 kly (21.5±0.4 kpc)[2] Absolute magnitude (V) −0.8+0.4 −1[2] Characteristics Type dSph Mass/Light ratio 2.7+0.5 −0.8[3] M☉/L☉ Size 324 ly Other designations Lae 4, Dra II

**Draco II / Leavens 4** is a [dwarf](/source/Dwarf_galaxy) [satellite galaxy](/source/Satellite_galaxy) orbiting the [Milky Way](/source/Milky_Way) discovered by the [Pan-STARRS1 3π survey](/source/Pan-STARRS) in 2015.[3] Currently, it is both one of the nearest and dimmest galaxies known to astronomers. Analysis of its stars' distribution in [color–magnitude space](/source/Hertzsprung%E2%80%93Russell_diagram) show that Draco II is approximately 13.5 billion years old.[2]

## References

1. ^ [***a***](#cite_ref-SIMBAD_1-0) [***b***](#cite_ref-SIMBAD_1-1) ["NAME Draco II"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NAME+Draco+II). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2025-04-07.

1. ^ [***a***](#cite_ref-longeard_2-0) [***b***](#cite_ref-longeard_2-1) [***c***](#cite_ref-longeard_2-2) Longeard, Nicolas; Martin, Nicolas; Starkenburg, Else; Ibata, Rodrigo A; Collins, Michelle L M; Geha, Marla; Laevens, Benjamin P M; Rich, R Michael; Aguado, David S; Arentsen, Anke; Carlberg, Raymond G; Côté, Patrick; Hill, Vanessa; Jablonka, Pascale; González Hernández, Jonay I (2018-10-21). ["Pristine dwarf galaxy survey – I. A detailed photometric and spectroscopic study of the very metal-poor Draco II satellite"](https://academic.oup.com/mnras/article/480/2/2609/5060758). *Monthly Notices of the Royal Astronomical Society*. **480** (2): 2609–2627. [arXiv](/source/ArXiv_(identifier)):[1807.10655](https://arxiv.org/abs/1807.10655). [doi](/source/Doi_(identifier)):[10.1093/mnras/sty1986](https://doi.org/10.1093%2Fmnras%2Fsty1986). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. ^ [***a***](#cite_ref-martin_3-0) [***b***](#cite_ref-martin_3-1) Martin, Nicolas F.; Geha, Marla; Ibata, Rodrigo A.; Collins, Michelle L. M.; Laevens, Benjamin P. M.; Bell, Eric F.; Rix, Hans-Walter; Ferguson, Annette M. N.; Chambers, Kenneth C.; Wainscoat, Richard J.; Waters, Christopher (2016-03-01). ["Is Draco II one of the faintest dwarf galaxies? First study from Keck/DEIMOS spectroscopy"](https://academic.oup.com/mnrasl/article/458/1/L59/2589548). *Monthly Notices of the Royal Astronomical Society: Letters*. **458** (1): L59–L63. [arXiv](/source/ArXiv_(identifier)):[1510.01326](https://arxiv.org/abs/1510.01326). [doi](/source/Doi_(identifier)):[10.1093/mnrasl/slw013](https://doi.org/10.1093%2Fmnrasl%2Fslw013). [ISSN](/source/ISSN_(identifier)) [1745-3925](https://search.worldcat.org/issn/1745-3925).

v t e Milky Way Location Milky Way → Milky Way subgroup → Local Group → Local Sheet → Local Volume → Virgo Supercluster → Laniakea Supercluster → Pisces–Cetus Supercluster Complex → Local Hole → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". The Milky Way Galaxy Structure Galactic Center Sagittarius A Sagittarius A* Fermi bubbles Supermassive black hole Galactic Center filaments Galactic Center GeV excess Galactic Center Radio Arc Disk Carina–Sagittarius Norma–Cygnus Orion–Cygnus Perseus Scutum–Centaurus Near 3 kpc Arm Far 3 kpc Arm Halo Aquarius Stream Fimbulthul stream Gaia Sausage Helmi stream Magellanic Stream Monoceros Ring Palomar 5 stream Pisces–Eridanus stream Sagittarius Stream Virgo Stream Satellite galaxies Magellanic Clouds Large Magellanic Cloud Small Magellanic Cloud Magellanic Bridge Dwarfs Antlia II Boötes I Boötes II Boötes III Canes Venatici I Canes Venatici II Canis Major Carina Coma Berenices Crater 2 Draco Eridanus II Fornax Hercules Leo I Leo II Leo IV Leo V Leo T Phoenix Pisces Overdensity Pisces II Reticulum II Sagittarius Spheroidal Segue 1 Segue 2 Sculptor Sextans Triangulum II Ursa Major I Ursa Major II Ursa Major III Ursa Minor Virgo I Willman 1 Related Alternate names Andromeda–Milky Way collision Baade's Window In mythology Zone of Avoidance Astronomy portal Category

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Adapted from the Wikipedia article [Draco II](https://en.wikipedia.org/wiki/Draco_II) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Draco_II?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.